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</div> <div class="control"> <button class="button is-small is-link">Go</button> </div> </div> </form> </div> </div> <nav class="pagination is-small is-centered breathe-horizontal" role="navigation" aria-label="pagination"> <a href="" class="pagination-previous is-invisible">Previous </a> <a href="/search/?searchtype=author&query=Ferrer-Ribas%2C+E&start=50" class="pagination-next" >Next </a> <ul class="pagination-list"> <li> <a href="/search/?searchtype=author&query=Ferrer-Ribas%2C+E&start=0" class="pagination-link is-current" aria-label="Goto page 1">1 </a> </li> <li> <a href="/search/?searchtype=author&query=Ferrer-Ribas%2C+E&start=50" class="pagination-link " aria-label="Page 2" aria-current="page">2 </a> </li> </ul> </nav> <ol class="breathe-horizontal" start="1"> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2411.13915">arXiv:2411.13915</a> <span> [<a href="https://arxiv.org/pdf/2411.13915">pdf</a>, <a href="https://arxiv.org/format/2411.13915">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="High Energy Physics - Experiment">hep-ex</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Instrumentation and Methods for Astrophysics">astro-ph.IM</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Solar and Stellar Astrophysics">astro-ph.SR</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Computational Physics">physics.comp-ph</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Data Analysis, Statistics and Probability">physics.data-an</span> </div> </div> <p class="title is-5 mathjax"> An accurate solar axions ray-tracing response of BabyIAXO </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Ahyoune%2C+S">S. Ahyoune</a>, <a href="/search/physics?searchtype=author&query=Altenmueller%2C+K">K. Altenmueller</a>, <a href="/search/physics?searchtype=author&query=Antolin%2C+I">I. Antolin</a>, <a href="/search/physics?searchtype=author&query=Basso%2C+S">S. Basso</a>, <a href="/search/physics?searchtype=author&query=Brun%2C+P">P. Brun</a>, <a href="/search/physics?searchtype=author&query=Candon%2C+F+R">F. R. Candon</a>, <a href="/search/physics?searchtype=author&query=Castel%2C+J+F">J. F. Castel</a>, <a href="/search/physics?searchtype=author&query=Cebrian%2C+S">S. Cebrian</a>, <a href="/search/physics?searchtype=author&query=Chouhan%2C+D">D. Chouhan</a>, <a href="/search/physics?searchtype=author&query=Della+Ceca%2C+R">R. Della Ceca</a>, <a href="/search/physics?searchtype=author&query=Cervera-Cortes%2C+M">M. Cervera-Cortes</a>, <a href="/search/physics?searchtype=author&query=Chernov%2C+V">V. Chernov</a>, <a href="/search/physics?searchtype=author&query=Civitani%2C+M+M">M. M. Civitani</a>, <a href="/search/physics?searchtype=author&query=Cogollos%2C+C">C. Cogollos</a>, <a href="/search/physics?searchtype=author&query=Costa%2C+E">E. Costa</a>, <a href="/search/physics?searchtype=author&query=Cotroneo%2C+V">V. Cotroneo</a>, <a href="/search/physics?searchtype=author&query=Dafni%2C+T">T. Dafni</a>, <a href="/search/physics?searchtype=author&query=Derbin%2C+A">A. Derbin</a>, <a href="/search/physics?searchtype=author&query=Desch%2C+K">K. Desch</a>, <a href="/search/physics?searchtype=author&query=Diaz-Martin%2C+M+C">M. C. Diaz-Martin</a>, <a href="/search/physics?searchtype=author&query=Diaz-Morcillo%2C+A">A. Diaz-Morcillo</a>, <a href="/search/physics?searchtype=author&query=Diez-Ibanez%2C+D">D. Diez-Ibanez</a>, <a href="/search/physics?searchtype=author&query=Pardos%2C+C+D">C. Diez Pardos</a>, <a href="/search/physics?searchtype=author&query=Dinter%2C+M">M. Dinter</a>, <a href="/search/physics?searchtype=author&query=Doebrich%2C+B">B. Doebrich</a> , et al. (102 additional authors not shown) </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2411.13915v2-abstract-short" style="display: inline;"> BabyIAXO is the intermediate stage of the International Axion Observatory (IAXO) to be hosted at DESY. Its primary goal is the detection of solar axions following the axion helioscope technique. Axions are converted into photons in a large magnet that is pointing to the sun. The resulting X-rays are focused by appropriate X-ray optics and detected by sensitive low-background detectors placed at th… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2411.13915v2-abstract-full').style.display = 'inline'; document.getElementById('2411.13915v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2411.13915v2-abstract-full" style="display: none;"> BabyIAXO is the intermediate stage of the International Axion Observatory (IAXO) to be hosted at DESY. Its primary goal is the detection of solar axions following the axion helioscope technique. Axions are converted into photons in a large magnet that is pointing to the sun. The resulting X-rays are focused by appropriate X-ray optics and detected by sensitive low-background detectors placed at the focal spot. The aim of this article is to provide an accurate quantitative description of the different components (such as the magnet, optics, and X-ray detectors) involved in the detection of axions. Our efforts have focused on developing robust and integrated software tools to model these helioscope components, enabling future assessments of modifications or upgrades to any part of the IAXO axion helioscope and evaluating the potential impact on the experiment's sensitivity. In this manuscript, we demonstrate the application of these tools by presenting a precise signal calculation and response analysis of BabyIAXO's sensitivity to the axion-photon coupling. Though focusing on the Primakoff solar flux component, our virtual helioscope model can be used to test different production mechanisms, allowing for direct comparisons within a unified framework. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2411.13915v2-abstract-full').style.display = 'none'; document.getElementById('2411.13915v2-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 29 November, 2024; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 21 November, 2024; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> November 2024. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">36 pages, 18 figures, 4 tables, Submitted to JHEP</span> </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2407.15491">arXiv:2407.15491</a> <span> [<a href="https://arxiv.org/pdf/2407.15491">pdf</a>, <a href="https://arxiv.org/format/2407.15491">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Instrumentation and Detectors">physics.ins-det</span> </div> </div> <p class="title is-5 mathjax"> Spatial resolution studies using point spread function extraction in optically read out Micromegas and GEM detectors </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Cools%2C+A">A. Cools</a>, <a href="/search/physics?searchtype=author&query=Ferrer-Ribas%2C+E">E. Ferrer-Ribas</a>, <a href="/search/physics?searchtype=author&query=Papaevangelou%2C+T">T. Papaevangelou</a>, <a href="/search/physics?searchtype=author&query=Pollacco%2C+E+C">E. C. Pollacco</a>, <a href="/search/physics?searchtype=author&query=Lisowska%2C+M">M. Lisowska</a>, <a href="/search/physics?searchtype=author&query=Brunbauer%2C+F+M">F. M. Brunbauer</a>, <a href="/search/physics?searchtype=author&query=Oliveri%2C+E">E. Oliveri</a>, <a href="/search/physics?searchtype=author&query=Iguaz%2C+F+J">F. J. Iguaz</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2407.15491v1-abstract-short" style="display: inline;"> Optically read out gaseous detectors are used in track reconstruction and imaging applications requiring high granularity images. Among resolution-determining factors, the amplification stage plays a crucial role and optimisations of detector geometry are pursued to maximise spatial resolution. To compare MicroPattern Gaseous Detector (MPGD) technologies, focused low-energy X-ray beams at the SOLE… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2407.15491v1-abstract-full').style.display = 'inline'; document.getElementById('2407.15491v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2407.15491v1-abstract-full" style="display: none;"> Optically read out gaseous detectors are used in track reconstruction and imaging applications requiring high granularity images. Among resolution-determining factors, the amplification stage plays a crucial role and optimisations of detector geometry are pursued to maximise spatial resolution. To compare MicroPattern Gaseous Detector (MPGD) technologies, focused low-energy X-ray beams at the SOLEIL synchrotron facility were used to record and extract point spread function widths with Micromegas and GEM detectors. Point spread function width of $\approx$108\,\microns for Micromegas and $\approx$127\,\microns for GEM foils were extracted. The scanning of the beam with different intensities, energies and across the detector active region can be used to quantify resolution-limiting factors and improve imaging detectors using MPGD amplification stages. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2407.15491v1-abstract-full').style.display = 'none'; document.getElementById('2407.15491v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 22 July, 2024; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> July 2024. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">22 pages, 17 figures</span> </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2404.09727">arXiv:2404.09727</a> <span> [<a href="https://arxiv.org/pdf/2404.09727">pdf</a>, <a href="https://arxiv.org/format/2404.09727">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Instrumentation and Detectors">physics.ins-det</span> </div> </div> <p class="title is-5 mathjax"> Using Micromegas detectors for direct dark matter searches: challenges and perspectives </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Altenmueller%2C+K">K. Altenmueller</a>, <a href="/search/physics?searchtype=author&query=Antolin%2C+.">. Antolin</a>, <a href="/search/physics?searchtype=author&query=Calvet%2C+D">D. Calvet</a>, <a href="/search/physics?searchtype=author&query=Candon%2C+F+R">F. R. Candon</a>, <a href="/search/physics?searchtype=author&query=Castel%2C+J">J. Castel</a>, <a href="/search/physics?searchtype=author&query=Cebrian%2C+S">S. Cebrian</a>, <a href="/search/physics?searchtype=author&query=Cogollos%2C+C">C. Cogollos</a>, <a href="/search/physics?searchtype=author&query=Dafni%2C+T">T. Dafni</a>, <a href="/search/physics?searchtype=author&query=Ibanez%2C+D+D">D. Diez Ibanez</a>, <a href="/search/physics?searchtype=author&query=Ferrer-Ribas%2C+E">E. Ferrer-Ribas</a>, <a href="/search/physics?searchtype=author&query=Galan%2C+J">J. Galan</a>, <a href="/search/physics?searchtype=author&query=Garcia%2C+J+A">J. A. Garcia</a>, <a href="/search/physics?searchtype=author&query=Gomez%2C+H">H. Gomez</a>, <a href="/search/physics?searchtype=author&query=Gu%2C+Y">Y. Gu</a>, <a href="/search/physics?searchtype=author&query=Ezquerro%2C+A">A. Ezquerro</a>, <a href="/search/physics?searchtype=author&query=Irastorza%2C+I+G">I. G Irastorza</a>, <a href="/search/physics?searchtype=author&query=Luzon%2C+G">G. Luzon</a>, <a href="/search/physics?searchtype=author&query=Margalejo%2C+C">C. Margalejo</a>, <a href="/search/physics?searchtype=author&query=Mirallas%2C+H">H. Mirallas</a>, <a href="/search/physics?searchtype=author&query=Obis%2C+L">L. Obis</a>, <a href="/search/physics?searchtype=author&query=de+Solorzano%2C+A+O">A. Ortiz de Solorzano</a>, <a href="/search/physics?searchtype=author&query=Papaevangelou%2C+T">T. Papaevangelou</a>, <a href="/search/physics?searchtype=author&query=Perez%2C+O">O. Perez</a>, <a href="/search/physics?searchtype=author&query=Picatoste%2C+E">E. Picatoste</a>, <a href="/search/physics?searchtype=author&query=Porron%2C+J">J. Porron</a> , et al. (5 additional authors not shown) </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2404.09727v1-abstract-short" style="display: inline;"> Gas time projection chambers (TPCs) with Micromegas pixelated readouts are being used in dark matter searches and other rare event searches, due to their potential in terms of low background levels, energy and spatial resolution, gain, and operational stability. Moreover, these detectors can provide precious features,such as topological information, allowing for event directionality and powerful s… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2404.09727v1-abstract-full').style.display = 'inline'; document.getElementById('2404.09727v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2404.09727v1-abstract-full" style="display: none;"> Gas time projection chambers (TPCs) with Micromegas pixelated readouts are being used in dark matter searches and other rare event searches, due to their potential in terms of low background levels, energy and spatial resolution, gain, and operational stability. Moreover, these detectors can provide precious features,such as topological information, allowing for event directionality and powerful signal-background discrimination. The Micromegas technology of the microbulk type is particularly suited to low-background applications and is being exploited by detectors for CAST and IAXO (solar axions) and TREX-DM (low-mass WIMPs) experiments. Challenges for the future include reducing intrinsic background levels, reaching lower energy detection levels, and technical issues such as robustness of detector, new design choices, novel gas mixtures and operation points, scaling up to larger detector sizes, handling large readout granularity, etc. We report on the status and prospects of the development ongoing in the context of IAXO and TREX-DM experiments, pointing to promising perspectives for the use of Micromegas detectors in directdark matter searches <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2404.09727v1-abstract-full').style.display = 'none'; document.getElementById('2404.09727v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 15 April, 2024; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> April 2024. </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2403.06316">arXiv:2403.06316</a> <span> [<a href="https://arxiv.org/pdf/2403.06316">pdf</a>, <a href="https://arxiv.org/format/2403.06316">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Instrumentation and Detectors">physics.ins-det</span> </div> </div> <p class="title is-5 mathjax"> Background discrimination with a Micromegas detector prototype and veto system for BabyIAXO </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Altenm%C3%BCller%2C+K">K. Altenm眉ller</a>, <a href="/search/physics?searchtype=author&query=Castel%2C+J+F">J. F. Castel</a>, <a href="/search/physics?searchtype=author&query=Cebri%C3%A1n%2C+S">S. Cebri谩n</a>, <a href="/search/physics?searchtype=author&query=Dafni%2C+T">T. Dafni</a>, <a href="/search/physics?searchtype=author&query=D%C3%ADez-Iba%C3%B1ez%2C+D">D. D铆ez-Iba帽ez</a>, <a href="/search/physics?searchtype=author&query=Ezquerro%2C+A">A. Ezquerro</a>, <a href="/search/physics?searchtype=author&query=Ferrer-Ribas%2C+E">E. Ferrer-Ribas</a>, <a href="/search/physics?searchtype=author&query=Galan%2C+J">J. Galan</a>, <a href="/search/physics?searchtype=author&query=Galindo%2C+J">J. Galindo</a>, <a href="/search/physics?searchtype=author&query=Garc%C3%ADa%2C+J+A">J. A. Garc铆a</a>, <a href="/search/physics?searchtype=author&query=Giganon%2C+A">A. Giganon</a>, <a href="/search/physics?searchtype=author&query=Goblin%2C+C">C. Goblin</a>, <a href="/search/physics?searchtype=author&query=Irastorza%2C+I+G">I. G. Irastorza</a>, <a href="/search/physics?searchtype=author&query=Loiseau%2C+C">C. Loiseau</a>, <a href="/search/physics?searchtype=author&query=Luz%C3%B3n%2C+G">G. Luz贸n</a>, <a href="/search/physics?searchtype=author&query=Navick%2C+X+F">X. F. Navick</a>, <a href="/search/physics?searchtype=author&query=Margalejo%2C+C">C. Margalejo</a>, <a href="/search/physics?searchtype=author&query=Mirallas%2C+H">H. Mirallas</a>, <a href="/search/physics?searchtype=author&query=Obis%2C+L">L. Obis</a>, <a href="/search/physics?searchtype=author&query=de+Sol%C3%B3rzano%2C+A+O">A. Ortiz de Sol贸rzano</a>, <a href="/search/physics?searchtype=author&query=Papaevangelou%2C+T">T. Papaevangelou</a>, <a href="/search/physics?searchtype=author&query=P%C3%A9rez%2C+O">O. P茅rez</a>, <a href="/search/physics?searchtype=author&query=Quintana%2C+A">A. Quintana</a>, <a href="/search/physics?searchtype=author&query=Ruz%2C+J">J. Ruz</a>, <a href="/search/physics?searchtype=author&query=Vogel%2C+J+K">J. K. Vogel</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2403.06316v1-abstract-short" style="display: inline;"> In this paper we present measurements performed with a Micromegas X-ray detector setup. The detector is a prototype in the context of the BabyIAXO helioscope, which is under construction to search for an emission of the hypothetical axion particle from the sun. An important component of such a helioscope is a low background X-ray detector with a high efficiency in the 1-10 keV energy range. The go… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2403.06316v1-abstract-full').style.display = 'inline'; document.getElementById('2403.06316v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2403.06316v1-abstract-full" style="display: none;"> In this paper we present measurements performed with a Micromegas X-ray detector setup. The detector is a prototype in the context of the BabyIAXO helioscope, which is under construction to search for an emission of the hypothetical axion particle from the sun. An important component of such a helioscope is a low background X-ray detector with a high efficiency in the 1-10 keV energy range. The goal of the measurement was to study techniques for background discrimination. In addition to common techniques we used a multi-layer veto system designed to tag cosmogenic neutron background. Over an effective time of 52 days, a background level of $8.6 \times 10^{-7}\,\text{counts keV}^{-1}\,\text{cm}^{-2} \, \text{s}^{-1}$ was reached in a laboratory at above ground level. This is the lowest background level achieved at surface level. In this paper we present the experimental setup, show simulations of the neutron-induced background, and demonstrate the process to identify background signals in the data. Finally, prospects to reach lower background levels down to $10^{-7} \, \text{counts keV}^{-1} \, \text{cm}^{-2} \, \text{s}^{-1}$ will be discussed. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2403.06316v1-abstract-full').style.display = 'none'; document.getElementById('2403.06316v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 10 March, 2024; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> March 2024. </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2303.17444">arXiv:2303.17444</a> <span> [<a href="https://arxiv.org/pdf/2303.17444">pdf</a>, <a href="https://arxiv.org/format/2303.17444">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Instrumentation and Detectors">physics.ins-det</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1088/1748-0221/18/06/C06019">10.1088/1748-0221/18/06/C06019 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> X-ray imaging with Micromegas detectors with optical readout </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Cools%2C+A">A. Cools</a>, <a href="/search/physics?searchtype=author&query=Aune%2C+S">S. Aune</a>, <a href="/search/physics?searchtype=author&query=Beau%2C+F">F. Beau</a>, <a href="/search/physics?searchtype=author&query=Brunbauer%2C+F+M">F. M. Brunbauer</a>, <a href="/search/physics?searchtype=author&query=Benoit%2C+T">T. Benoit</a>, <a href="/search/physics?searchtype=author&query=Desforge%2C+D">D. Desforge</a>, <a href="/search/physics?searchtype=author&query=Ferrer-Ribas%2C+E">E. Ferrer-Ribas</a>, <a href="/search/physics?searchtype=author&query=Kallitsopoulou%2C+A">A. Kallitsopoulou</a>, <a href="/search/physics?searchtype=author&query=Malgorn%2C+C">C. Malgorn</a>, <a href="/search/physics?searchtype=author&query=Oliveri%2C+E">E. Oliveri</a>, <a href="/search/physics?searchtype=author&query=Papaevangelou%2C+T">T. Papaevangelou</a>, <a href="/search/physics?searchtype=author&query=Pollacco%2C+E+C">E. C. Pollacco</a>, <a href="/search/physics?searchtype=author&query=Ropelewski%2C+L">L. Ropelewski</a>, <a href="/search/physics?searchtype=author&query=Sari%2C+A">A. Sari</a>, <a href="/search/physics?searchtype=author&query=Iguaz%2C+F+J">F. J. Iguaz</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2303.17444v1-abstract-short" style="display: inline;"> In the last years, optical readout of Micromegas gaseous detectors has been achieved by implementing a Micromegas detector on a glass anode coupled to a CMOS camera. Effective X-ray radiography was demonstrated using integrated imaging approach. High granularity values have been reached for low-energy X-rays from radioactive sources and X-ray generators. Detector characterization with X-ray radi… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2303.17444v1-abstract-full').style.display = 'inline'; document.getElementById('2303.17444v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2303.17444v1-abstract-full" style="display: none;"> In the last years, optical readout of Micromegas gaseous detectors has been achieved by implementing a Micromegas detector on a glass anode coupled to a CMOS camera. Effective X-ray radiography was demonstrated using integrated imaging approach. High granularity values have been reached for low-energy X-rays from radioactive sources and X-ray generators. Detector characterization with X-ray radiography has led to two applications: neutron imaging for non-destructive examination of highly gamma-ray emitting objects and beta imaging for the single cell activity tagging in the field of oncology drug studies. First measurements investigating the achievable spatial resolution of the glass Micromegas detector at the SOLEIL synchrotron facility with a high-intensity and flat irradiation field will be shown in this article. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2303.17444v1-abstract-full').style.display = 'none'; document.getElementById('2303.17444v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 30 March, 2023; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> March 2023. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">6 pages, 4 figures, 7th International Conference on Micro Pattern Gaseous Detectors, 11-16 December 20223, Weizmann Institute of Science, Rehovot, Israel</span> </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2303.15028">arXiv:2303.15028</a> <span> [<a href="https://arxiv.org/pdf/2303.15028">pdf</a>, <a href="https://arxiv.org/format/2303.15028">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="High Energy Physics - Experiment">hep-ex</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Instrumentation and Detectors">physics.ins-det</span> </div> </div> <p class="title is-5 mathjax"> Ultra low background Micromegas detectors for BabyIAXO solar axion search </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Ferrer-Ribas%2C+E">E. Ferrer-Ribas</a>, <a href="/search/physics?searchtype=author&query=Altenm%C3%BCller%2C+K">K. Altenm眉ller</a>, <a href="/search/physics?searchtype=author&query=Biasuzzi%2C+B">B. Biasuzzi</a>, <a href="/search/physics?searchtype=author&query=Castel%2C+J+F">J. F. Castel</a>, <a href="/search/physics?searchtype=author&query=Cebri%C3%A1n%2C+S">S. Cebri谩n</a>, <a href="/search/physics?searchtype=author&query=Dafni%2C+T">T. Dafni</a>, <a href="/search/physics?searchtype=author&query=Desch%2C+K">K. Desch</a>, <a href="/search/physics?searchtype=author&query=D%C3%ADez-Iba%C3%B1ez%2C+D">D. D铆ez-Iba帽ez</a>, <a href="/search/physics?searchtype=author&query=Gal%C3%A1n%2C+J">J. Gal谩n</a>, <a href="/search/physics?searchtype=author&query=Galindo%2C+J">J. Galindo</a>, <a href="/search/physics?searchtype=author&query=Garc%C3%ADa%2C+J+A">J. A. Garc铆a</a>, <a href="/search/physics?searchtype=author&query=Giganon%2C+A">A. Giganon</a>, <a href="/search/physics?searchtype=author&query=Goblin%2C+C">C. Goblin</a>, <a href="/search/physics?searchtype=author&query=Irastorza%2C+I+G">I. G. Irastorza</a>, <a href="/search/physics?searchtype=author&query=Kaminski%2C+J">J. Kaminski</a>, <a href="/search/physics?searchtype=author&query=Luz%C3%B3n%2C+G">G. Luz贸n</a>, <a href="/search/physics?searchtype=author&query=Margalejo%2C+C">C. Margalejo</a>, <a href="/search/physics?searchtype=author&query=Mirallas%2C+H">H. Mirallas</a>, <a href="/search/physics?searchtype=author&query=Navick%2C+X+F">X. F. Navick</a>, <a href="/search/physics?searchtype=author&query=Obis%2C+L">L. Obis</a>, <a href="/search/physics?searchtype=author&query=de+Sol%C3%B3rzano%2C+A+O">A. Ortiz de Sol贸rzano</a>, <a href="/search/physics?searchtype=author&query=von+Oy%2C+J">J. von Oy</a>, <a href="/search/physics?searchtype=author&query=Papaevangelou%2C+T">T. Papaevangelou</a>, <a href="/search/physics?searchtype=author&query=P%C3%A9rez%2C+O">O. P茅rez</a>, <a href="/search/physics?searchtype=author&query=Picatoste%2C+E">E. Picatoste</a> , et al. (5 additional authors not shown) </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2303.15028v2-abstract-short" style="display: inline;"> The International AXion Observatory (IAXO) is a large scale axion helioscope that will look for axions and axion-like particles produced in the Sun with unprecedented sensitivity. BabyIAXO is an intermediate experimental stage that will be hosted at DESY (Germany) and that will test all IAXO subsystems serving as a prototype for IAXO but at the same time as a fully-fledged helioscope with potentia… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2303.15028v2-abstract-full').style.display = 'inline'; document.getElementById('2303.15028v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2303.15028v2-abstract-full" style="display: none;"> The International AXion Observatory (IAXO) is a large scale axion helioscope that will look for axions and axion-like particles produced in the Sun with unprecedented sensitivity. BabyIAXO is an intermediate experimental stage that will be hosted at DESY (Germany) and that will test all IAXO subsystems serving as a prototype for IAXO but at the same time as a fully-fledged helioscope with potential for discovery. One of the crucial components of the project is the ultra-low background X-ray detectors that will image the X-ray photons produced by axion conversion in the experiment. The baseline detection technology for this purpose are Micromegas (Microbulk) detectors. We will show the quest and the strategy to attain the very challenging levels of background targeted for BabyIAXO that need a multi-approach strategy coming from ground measurements, screening campaigns of components of the detector, underground measurements, background models, in-situ background measurements as well as powerful rejection algorithms. First results from the commissioning of the BabyIAXO prototype will be shown. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2303.15028v2-abstract-full').style.display = 'none'; document.getElementById('2303.15028v2-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 22 May, 2023; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 27 March, 2023; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> March 2023. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">4 pages, 2 figures, submitted for the proceedings of the International Conference on Micro Pattern Gaseous Detectors, December 2022, Israel</span> </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2109.09411">arXiv:2109.09411</a> <span> [<a href="https://arxiv.org/pdf/2109.09411">pdf</a>, <a href="https://arxiv.org/format/2109.09411">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Instrumentation and Detectors">physics.ins-det</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1016/j.nima.2022.166332">10.1016/j.nima.2022.166332 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Medica-Plus: a Micromegas-based proof-of-concept detector for sub-becquerel tritium activity assessment at the service of oncological research </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Jambon%2C+F">F. Jambon</a>, <a href="/search/physics?searchtype=author&query=Aune%2C+S">S. Aune</a>, <a href="/search/physics?searchtype=author&query=Baron%2C+P">P. Baron</a>, <a href="/search/physics?searchtype=author&query=Benoit%2C+T">T. Benoit</a>, <a href="/search/physics?searchtype=author&query=Bey%2C+T">T. Bey</a>, <a href="/search/physics?searchtype=author&query=Desforge%2C+D">D. Desforge</a>, <a href="/search/physics?searchtype=author&query=Ferrer-Ribas%2C+E">E. Ferrer-Ribas</a>, <a href="/search/physics?searchtype=author&query=Grabas%2C+A">A. Grabas</a>, <a href="/search/physics?searchtype=author&query=Kebbiri%2C+M">M. Kebbiri</a>, <a href="/search/physics?searchtype=author&query=Mandjavidze%2C+I">I. Mandjavidze</a>, <a href="/search/physics?searchtype=author&query=Papaevangelou%2C+T">T. Papaevangelou</a>, <a href="/search/physics?searchtype=author&query=Riallot%2C+M">M. Riallot</a>, <a href="/search/physics?searchtype=author&query=Vandenbroucke%2C+M">M. Vandenbroucke</a>, <a href="/search/physics?searchtype=author&query=Beau%2C+F">F. Beau</a>, <a href="/search/physics?searchtype=author&query=Dive%2C+V">V. Dive</a>, <a href="/search/physics?searchtype=author&query=Malgorn%2C+C">C. Malgorn</a>, <a href="/search/physics?searchtype=author&query=Malloggi%2C+F">F. Malloggi</a>, <a href="/search/physics?searchtype=author&query=Rousselot%2C+A">A. Rousselot</a>, <a href="/search/physics?searchtype=author&query=Carrel%2C+F">F. Carrel</a>, <a href="/search/physics?searchtype=author&query=Trocm%C3%A9%2C+M">M. Trocm茅</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2109.09411v1-abstract-short" style="display: inline;"> To fulfill needs in oncological research a new Micromegas detector has been developed to follow radiolabelled drugs in living organisms at the single cell level. This article describes the proof-of-concept of such a detector and compares its ability to detect and assess sub-becquerel \tritium~activities with a commercial $尾$-imager </span> <span class="abstract-full has-text-grey-dark mathjax" id="2109.09411v1-abstract-full" style="display: none;"> To fulfill needs in oncological research a new Micromegas detector has been developed to follow radiolabelled drugs in living organisms at the single cell level. This article describes the proof-of-concept of such a detector and compares its ability to detect and assess sub-becquerel \tritium~activities with a commercial $尾$-imager <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2109.09411v1-abstract-full').style.display = 'none'; document.getElementById('2109.09411v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 20 September, 2021; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> September 2021. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">14 pages, to be submitted to NIMA</span> </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2109.05863">arXiv:2109.05863</a> <span> [<a href="https://arxiv.org/pdf/2109.05863">pdf</a>, <a href="https://arxiv.org/format/2109.05863">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Computational Physics">physics.comp-ph</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Data Analysis, Statistics and Probability">physics.data-an</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Instrumentation and Detectors">physics.ins-det</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1016/j.cpc.2021.108281">10.1016/j.cpc.2021.108281 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> REST-for-Physics, a ROOT-based framework for event oriented data analysis and combined Monte Carlo response </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Altenm%C3%BCller%2C+K">Konrad Altenm眉ller</a>, <a href="/search/physics?searchtype=author&query=Cebri%C3%A1n%2C+S">Susana Cebri谩n</a>, <a href="/search/physics?searchtype=author&query=Dafni%2C+T">Theopisti Dafni</a>, <a href="/search/physics?searchtype=author&query=D%C3%ADez-Ib%C3%A1%C3%B1ez%2C+D">David D铆ez-Ib谩帽ez</a>, <a href="/search/physics?searchtype=author&query=Gal%C3%A1n%2C+J">Javier Gal谩n</a>, <a href="/search/physics?searchtype=author&query=Galindo%2C+J">Javier Galindo</a>, <a href="/search/physics?searchtype=author&query=Garc%C3%ADa%2C+J+A">Juan Antonio Garc铆a</a>, <a href="/search/physics?searchtype=author&query=Irastorza%2C+I+G">Igor G. Irastorza</a>, <a href="/search/physics?searchtype=author&query=Luz%C3%B3n%2C+G">Gloria Luz贸n</a>, <a href="/search/physics?searchtype=author&query=Margalejo%2C+C">Cristina Margalejo</a>, <a href="/search/physics?searchtype=author&query=Mirallas%2C+H">Hector Mirallas</a>, <a href="/search/physics?searchtype=author&query=Obis%2C+L">Luis Obis</a>, <a href="/search/physics?searchtype=author&query=P%C3%A9rez%2C+O">Oscar P茅rez</a>, <a href="/search/physics?searchtype=author&query=Han%2C+K">Ke Han</a>, <a href="/search/physics?searchtype=author&query=Ni%2C+K">Kaixiang Ni</a>, <a href="/search/physics?searchtype=author&query=Bedfer%2C+Y">Yann Bedfer</a>, <a href="/search/physics?searchtype=author&query=Biasuzzi%2C+B">Barbara Biasuzzi</a>, <a href="/search/physics?searchtype=author&query=Ferrer-Ribas%2C+E">Esther Ferrer-Ribas</a>, <a href="/search/physics?searchtype=author&query=Neyret%2C+D">Damien Neyret</a>, <a href="/search/physics?searchtype=author&query=Papaevangelou%2C+T">Thomas Papaevangelou</a>, <a href="/search/physics?searchtype=author&query=Cogollos%2C+C">Cristian Cogollos</a>, <a href="/search/physics?searchtype=author&query=Picatoste%2C+E">Eduardo Picatoste</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2109.05863v2-abstract-short" style="display: inline;"> The REST-for-Physics (Rare Event Searches Toolkit for Physics) framework is a ROOT-based solution providing the means to process and analyze experimental or Monte Carlo event data. Special care has been taken on the traceability of the code and the validation of the results produced within the framework, together with the connectivity between code and data stored registered through specific versio… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2109.05863v2-abstract-full').style.display = 'inline'; document.getElementById('2109.05863v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2109.05863v2-abstract-full" style="display: none;"> The REST-for-Physics (Rare Event Searches Toolkit for Physics) framework is a ROOT-based solution providing the means to process and analyze experimental or Monte Carlo event data. Special care has been taken on the traceability of the code and the validation of the results produced within the framework, together with the connectivity between code and data stored registered through specific version metadata members. The framework development was originally motivated to cover the needs at Rare Event Searches experiments (experiments looking for phenomena having extremely low occurrence probability like dark matter or neutrino interactions or rare nuclear decays), and its components naturally implement tools to address the challenges in these kinds of experiments; the integration of a detector physics response, the implementation of signal processing routines, or topological algorithms for physical event identification are some examples. Despite this specialization, the framework was conceived thinking in scalability, and other event-oriented applications could benefit from the data processing routines and/or metadata description implemented in REST, being the generic framework tools completely decoupled from dedicated libraries. REST-for-Physics is a consolidated piece of software already serving the needs of different physics experiments - using gaseous Time Projection Chambers (TPCs) as detection technology - for background data analysis and detector characterization, as well as generic detector R\&D. Even though REST has been exploited mainly with gaseous TPCs, the code could be easily applied or adapted to other detection technologies. We present in this work an overview of REST-for-Physics, providing a broad perspective to the infrastructure and organization of the project as a whole. The framework and its different components will be described in the text. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2109.05863v2-abstract-full').style.display = 'none'; document.getElementById('2109.05863v2-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 19 November, 2021; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 13 September, 2021; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> September 2021. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">27 pages, 14 figures, prepared for submission to Computer Physics Communications</span> </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2010.12076">arXiv:2010.12076</a> <span> [<a href="https://arxiv.org/pdf/2010.12076">pdf</a>, <a href="https://arxiv.org/format/2010.12076">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Instrumentation and Detectors">physics.ins-det</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Instrumentation and Methods for Astrophysics">astro-ph.IM</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="High Energy Physics - Experiment">hep-ex</span> </div> </div> <p class="title is-5 mathjax"> Conceptual Design of BabyIAXO, the intermediate stage towards the International Axion Observatory </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Abeln%2C+A">A. Abeln</a>, <a href="/search/physics?searchtype=author&query=Altenm%C3%BCller%2C+K">K. Altenm眉ller</a>, <a href="/search/physics?searchtype=author&query=Cuendis%2C+S+A">S. Arguedas Cuendis</a>, <a href="/search/physics?searchtype=author&query=Armengaud%2C+E">E. Armengaud</a>, <a href="/search/physics?searchtype=author&query=Atti%C3%A9%2C+D">D. Atti茅</a>, <a href="/search/physics?searchtype=author&query=Aune%2C+S">S. Aune</a>, <a href="/search/physics?searchtype=author&query=Basso%2C+S">S. Basso</a>, <a href="/search/physics?searchtype=author&query=Berg%C3%A9%2C+L">L. Berg茅</a>, <a href="/search/physics?searchtype=author&query=Biasuzzi%2C+B">B. Biasuzzi</a>, <a href="/search/physics?searchtype=author&query=De+Sousa%2C+P+T+C+B">P. T. C. Borges De Sousa</a>, <a href="/search/physics?searchtype=author&query=Brun%2C+P">P. Brun</a>, <a href="/search/physics?searchtype=author&query=Bykovskiy%2C+N">N. Bykovskiy</a>, <a href="/search/physics?searchtype=author&query=Calvet%2C+D">D. Calvet</a>, <a href="/search/physics?searchtype=author&query=Carmona%2C+J+M">J. M. Carmona</a>, <a href="/search/physics?searchtype=author&query=Castel%2C+J+F">J. F. Castel</a>, <a href="/search/physics?searchtype=author&query=Cebri%C3%A1n%2C+S">S. Cebri谩n</a>, <a href="/search/physics?searchtype=author&query=Chernov%2C+V">V. Chernov</a>, <a href="/search/physics?searchtype=author&query=Christensen%2C+F+E">F. E. Christensen</a>, <a href="/search/physics?searchtype=author&query=Civitani%2C+M+M">M. M. Civitani</a>, <a href="/search/physics?searchtype=author&query=Cogollos%2C+C">C. Cogollos</a>, <a href="/search/physics?searchtype=author&query=Dafn%C3%AD%2C+T">T. Dafn铆</a>, <a href="/search/physics?searchtype=author&query=Derbin%2C+A">A. Derbin</a>, <a href="/search/physics?searchtype=author&query=Desch%2C+K">K. Desch</a>, <a href="/search/physics?searchtype=author&query=D%C3%ADez%2C+D">D. D铆ez</a>, <a href="/search/physics?searchtype=author&query=Dinter%2C+M">M. Dinter</a> , et al. (101 additional authors not shown) </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2010.12076v3-abstract-short" style="display: inline;"> This article describes BabyIAXO, an intermediate experimental stage of the International Axion Observatory (IAXO), proposed to be sited at DESY. IAXO is a large-scale axion helioscope that will look for axions and axion-like particles (ALPs), produced in the Sun, with unprecedented sensitivity. BabyIAXO is conceived to test all IAXO subsystems (magnet, optics and detectors) at a relevant scale for… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2010.12076v3-abstract-full').style.display = 'inline'; document.getElementById('2010.12076v3-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2010.12076v3-abstract-full" style="display: none;"> This article describes BabyIAXO, an intermediate experimental stage of the International Axion Observatory (IAXO), proposed to be sited at DESY. IAXO is a large-scale axion helioscope that will look for axions and axion-like particles (ALPs), produced in the Sun, with unprecedented sensitivity. BabyIAXO is conceived to test all IAXO subsystems (magnet, optics and detectors) at a relevant scale for the final system and thus serve as prototype for IAXO, but at the same time as a fully-fledged helioscope with relevant physics reach itself, and with potential for discovery. The BabyIAXO magnet will feature two 10 m long, 70 cm diameter bores, and will host two detection lines (optics and detector) of dimensions similar to the final ones foreseen for IAXO. BabyIAXO will detect or reject solar axions or ALPs with axion-photon couplings down to $g_{a纬} \sim 1.5 \times 10^{-11}$ GeV$^{-1}$, and masses up to $m_a\sim 0.25$ eV. BabyIAXO will offer additional opportunities for axion research in view of IAXO, like the development of precision x-ray detectors to identify particular spectral features in the solar axion spectrum, and the implementation of radiofrequency-cavity-based axion dark matter setups. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2010.12076v3-abstract-full').style.display = 'none'; document.getElementById('2010.12076v3-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 4 March, 2021; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 22 October, 2020; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> October 2020. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">77 pages, 49 figures. Prepared for submission to JHEP. Third version after referees comments</span> </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1903.03979">arXiv:1903.03979</a> <span> [<a href="https://arxiv.org/pdf/1903.03979">pdf</a>, <a href="https://arxiv.org/ps/1903.03979">ps</a>, <a href="https://arxiv.org/format/1903.03979">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Instrumentation and Detectors">physics.ins-det</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="High Energy Physics - Experiment">hep-ex</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1088/1361-6471/ab4dbe">10.1088/1361-6471/ab4dbe <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Topological background discrimination in the PandaX-III neutrinoless double beta decay experiment </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Galan%2C+J">J Galan</a>, <a href="/search/physics?searchtype=author&query=Chen%2C+X">X Chen</a>, <a href="/search/physics?searchtype=author&query=Du%2C+H">H Du</a>, <a href="/search/physics?searchtype=author&query=Fu%2C+C">C Fu</a>, <a href="/search/physics?searchtype=author&query=Giboni%2C+K">K Giboni</a>, <a href="/search/physics?searchtype=author&query=Giuliani%2C+F">F Giuliani</a>, <a href="/search/physics?searchtype=author&query=Han%2C+K">K Han</a>, <a href="/search/physics?searchtype=author&query=Jiang%2C+B">B Jiang</a>, <a href="/search/physics?searchtype=author&query=Ji%2C+X">X Ji</a>, <a href="/search/physics?searchtype=author&query=Lin%2C+H">H Lin</a>, <a href="/search/physics?searchtype=author&query=Lin%2C+Y">Y Lin</a>, <a href="/search/physics?searchtype=author&query=Liu%2C+J">J Liu</a>, <a href="/search/physics?searchtype=author&query=Ni%2C+K">K Ni</a>, <a href="/search/physics?searchtype=author&query=Ren%2C+X">X Ren</a>, <a href="/search/physics?searchtype=author&query=Wang%2C+S">S Wang</a>, <a href="/search/physics?searchtype=author&query=Wu%2C+S">S Wu</a>, <a href="/search/physics?searchtype=author&query=Xie%2C+C">C Xie</a>, <a href="/search/physics?searchtype=author&query=Yang%2C+Y">Y Yang</a>, <a href="/search/physics?searchtype=author&query=Zhang%2C+D">D Zhang</a>, <a href="/search/physics?searchtype=author&query=Zhang%2C+T">T Zhang</a>, <a href="/search/physics?searchtype=author&query=Zhao%2C+L">L Zhao</a>, <a href="/search/physics?searchtype=author&query=Aune%2C+S">S Aune</a>, <a href="/search/physics?searchtype=author&query=Bedfer%2C+Y">Y Bedfer</a>, <a href="/search/physics?searchtype=author&query=Berthoumieux%2C+E">E Berthoumieux</a>, <a href="/search/physics?searchtype=author&query=Calvet%2C+D">D Calvet</a> , et al. (42 additional authors not shown) </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="1903.03979v2-abstract-short" style="display: inline;"> The PandaX-III experiment plans to search for neutrinoless double beta decay (0$谓尾尾$) of $^{136}$Xe in the China JinPing underground Laboratory (CJPL). The experiment will use a high pressure gaseous Time Projection Chamber (TPC) to register both the energy and the electron track topology of an event. This article is devoted to the software side of the experiment. As software tool we use REST, a f… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1903.03979v2-abstract-full').style.display = 'inline'; document.getElementById('1903.03979v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1903.03979v2-abstract-full" style="display: none;"> The PandaX-III experiment plans to search for neutrinoless double beta decay (0$谓尾尾$) of $^{136}$Xe in the China JinPing underground Laboratory (CJPL). The experiment will use a high pressure gaseous Time Projection Chamber (TPC) to register both the energy and the electron track topology of an event. This article is devoted to the software side of the experiment. As software tool we use REST, a framework developed for the reconstruction and simulation of TPC-based detector systems. We study the potential for background reduction by introducing appropiate parameters based on the properties of 0$谓尾尾$ events. We exploit for the first time not only the energy density of the electron track-ends, but also the electron scattering angles produced by an electron near the end of its trajectory. To implement this, we have added new algorithms for detector signal and track processing inside REST. Their assessment shows that background can be reduced by about 7 orders of magnitude while keeping 0$谓尾尾$ efficiency above 20% for the PandaX-III baseline readout scheme, a 2-dimensional 3mm-pitch stripped readout. More generally, we use the potential of REST to handle 2D/3D data to assess the impact on signal-to-background significance at different detector granularities, and to validate the PandaX-III baseline choice. Finally, we demonstrate the potential to discriminate surface background events generated at the readout plane in the absence of $t_o$, by making use of event parameters related with the diffusion of electrons. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1903.03979v2-abstract-full').style.display = 'none'; document.getElementById('1903.03979v2-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 22 July, 2019; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 10 March, 2019; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> March 2019. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">40 pages, 15 figures. Prepared for submission to Journal of Physics G</span> </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1808.00066">arXiv:1808.00066</a> <span> [<a href="https://arxiv.org/pdf/1808.00066">pdf</a>, <a href="https://arxiv.org/format/1808.00066">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="High Energy Physics - Experiment">hep-ex</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Instrumentation and Detectors">physics.ins-det</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1088/1475-7516/2019/01/032">10.1088/1475-7516/2019/01/032 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Improved Search for Solar Chameleons with a GridPix Detector at CAST </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Anastassopoulos%2C+V">V. Anastassopoulos</a>, <a href="/search/physics?searchtype=author&query=Aune%2C+S">S. Aune</a>, <a href="/search/physics?searchtype=author&query=Barth%2C+K">K. Barth</a>, <a href="/search/physics?searchtype=author&query=Belov%2C+A">A. Belov</a>, <a href="/search/physics?searchtype=author&query=Br%C3%A4uninger%2C+H">H. Br盲uninger</a>, <a href="/search/physics?searchtype=author&query=Cantatore%2C+G">G. Cantatore</a>, <a href="/search/physics?searchtype=author&query=Carmona%2C+J+M">J. M. Carmona</a>, <a href="/search/physics?searchtype=author&query=Castel%2C+J+F">J. F. Castel</a>, <a href="/search/physics?searchtype=author&query=Cetin%2C+S+A">S. A. Cetin</a>, <a href="/search/physics?searchtype=author&query=Christensen%2C+F">F. Christensen</a>, <a href="/search/physics?searchtype=author&query=Dafni%2C+T">T. Dafni</a>, <a href="/search/physics?searchtype=author&query=Davenport%2C+M">M. Davenport</a>, <a href="/search/physics?searchtype=author&query=Dermenev%2C+A">A. Dermenev</a>, <a href="/search/physics?searchtype=author&query=Desch%2C+K">K. Desch</a>, <a href="/search/physics?searchtype=author&query=D%C3%B6brich%2C+B">B. D枚brich</a>, <a href="/search/physics?searchtype=author&query=Eleftheriadis%2C+C">C. Eleftheriadis</a>, <a href="/search/physics?searchtype=author&query=Fanourakis%2C+G">G. Fanourakis</a>, <a href="/search/physics?searchtype=author&query=Ferrer-Ribas%2C+E">E. Ferrer-Ribas</a>, <a href="/search/physics?searchtype=author&query=Fischer%2C+H">H. Fischer</a>, <a href="/search/physics?searchtype=author&query=Funk%2C+W">W. Funk</a>, <a href="/search/physics?searchtype=author&query=Garc%C3%ADa%2C+J+A">J. A. Garc铆a</a>, <a href="/search/physics?searchtype=author&query=Gardikiotis%2C+A">A. Gardikiotis</a>, <a href="/search/physics?searchtype=author&query=Garza%2C+J+G">J. G. Garza</a>, <a href="/search/physics?searchtype=author&query=Gazis%2C+E+N">E. N. Gazis</a>, <a href="/search/physics?searchtype=author&query=Geralis%2C+T">T. Geralis</a> , et al. (44 additional authors not shown) </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="1808.00066v2-abstract-short" style="display: inline;"> We report on a new search for solar chameleons with the CERN Axion Solar Telescope (CAST). A GridPix detector was used to search for soft X-ray photons in the energy range from 200 eV to 10 keV from converted solar chameleons. No signiffcant excess over the expected background has been observed in the data taken in 2014 and 2015. We set an improved limit on the chameleon photon coupling,… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1808.00066v2-abstract-full').style.display = 'inline'; document.getElementById('1808.00066v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1808.00066v2-abstract-full" style="display: none;"> We report on a new search for solar chameleons with the CERN Axion Solar Telescope (CAST). A GridPix detector was used to search for soft X-ray photons in the energy range from 200 eV to 10 keV from converted solar chameleons. No signiffcant excess over the expected background has been observed in the data taken in 2014 and 2015. We set an improved limit on the chameleon photon coupling, $尾_纬< 5.7\times10^{10}$ for $1<尾_\mathrm{m}<10^6$ at 95% C.L. improving our previous results by a factor two and for the first time reaching sensitivity below the solar luminosity bound for tachocline magnetic fields up to $12.5\,\mathrm{T}$. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1808.00066v2-abstract-full').style.display = 'none'; document.getElementById('1808.00066v2-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 8 November, 2018; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 31 July, 2018; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> August 2018. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">19 pages, 12 figures, 3 tables</span> </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1705.02290">arXiv:1705.02290</a> <span> [<a href="https://arxiv.org/pdf/1705.02290">pdf</a>, <a href="https://arxiv.org/format/1705.02290">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="High Energy Physics - Experiment">hep-ex</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Instrumentation and Detectors">physics.ins-det</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1038/nphys4109">10.1038/nphys4109 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> New CAST Limit on the Axion-Photon Interaction </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=CAST+collaboration"> CAST collaboration</a>, <a href="/search/physics?searchtype=author&query=Anastassopoulos%2C+V">V. Anastassopoulos</a>, <a href="/search/physics?searchtype=author&query=Aune%2C+S">S. Aune</a>, <a href="/search/physics?searchtype=author&query=Barth%2C+K">K. Barth</a>, <a href="/search/physics?searchtype=author&query=Belov%2C+A">A. Belov</a>, <a href="/search/physics?searchtype=author&query=Br%7Fauninger%2C+H">H. Brauninger</a>, <a href="/search/physics?searchtype=author&query=Cantatore%2C+G">G. Cantatore</a>, <a href="/search/physics?searchtype=author&query=Carmona%2C+J+M">J. M. Carmona</a>, <a href="/search/physics?searchtype=author&query=Castel%2C+J+F">J. F. Castel</a>, <a href="/search/physics?searchtype=author&query=Cetin%2C+S+A">S. A. Cetin</a>, <a href="/search/physics?searchtype=author&query=Christensen%2C+F">F. Christensen</a>, <a href="/search/physics?searchtype=author&query=Collar%2C+J+I">J. I. Collar</a>, <a href="/search/physics?searchtype=author&query=Dafni%2C+T">T. Dafni</a>, <a href="/search/physics?searchtype=author&query=Davenport%2C+M">M. Davenport</a>, <a href="/search/physics?searchtype=author&query=Decker%2C+T+A">T. A. Decker</a>, <a href="/search/physics?searchtype=author&query=Dermenev%2C+A">A. Dermenev</a>, <a href="/search/physics?searchtype=author&query=Desch%2C+K">K. Desch</a>, <a href="/search/physics?searchtype=author&query=Eleftheriadis%2C+C">C. Eleftheriadis</a>, <a href="/search/physics?searchtype=author&query=Fanourakis%2C+G">G. Fanourakis</a>, <a href="/search/physics?searchtype=author&query=Ferrer-Ribas%2C+E">E. Ferrer-Ribas</a>, <a href="/search/physics?searchtype=author&query=Fischer%2C+H">H. Fischer</a>, <a href="/search/physics?searchtype=author&query=Garcia%2C+J+A">J. A. Garcia</a>, <a href="/search/physics?searchtype=author&query=Gardikiotis%2C+A">A. Gardikiotis</a>, <a href="/search/physics?searchtype=author&query=Garza%2C+J+G">J. G. Garza</a>, <a href="/search/physics?searchtype=author&query=Gazis%2C+E+N">E. N. Gazis</a> , et al. (42 additional authors not shown) </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="1705.02290v2-abstract-short" style="display: inline;"> During 2003--2015, the CERN Axion Solar Telescope (CAST) has searched for $a\to纬$ conversion in the 9 T magnetic field of a refurbished LHC test magnet that can be directed toward the Sun. In its final phase of solar axion searches (2013--2015), CAST has returned to evacuated magnet pipes, which is optimal for small axion masses. The absence of a significant signal above background provides a worl… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1705.02290v2-abstract-full').style.display = 'inline'; document.getElementById('1705.02290v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1705.02290v2-abstract-full" style="display: none;"> During 2003--2015, the CERN Axion Solar Telescope (CAST) has searched for $a\to纬$ conversion in the 9 T magnetic field of a refurbished LHC test magnet that can be directed toward the Sun. In its final phase of solar axion searches (2013--2015), CAST has returned to evacuated magnet pipes, which is optimal for small axion masses. The absence of a significant signal above background provides a world leading limit of $g_{a纬} < 0.66 \times 10^{-10} {\rm GeV}^{-1}$ (95% C.L.) on the axion-photon coupling strength for $m_a \lesssim 0.02$ eV. Compared with the first vacuum phase (2003--2004), the sensitivity was vastly increased with low-background x-ray detectors and a new x-ray telescope. These innovations also serve as pathfinders for a possible next-generation axion helioscope. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1705.02290v2-abstract-full').style.display = 'none'; document.getElementById('1705.02290v2-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 20 December, 2017; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 5 May, 2017; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> May 2017. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">Second version after referees comments (post-print). Published version available Open Access at https://www.nature.com/articles/nphys4109</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Nature Phys. 13 (2017) 584-590 </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1610.08883">arXiv:1610.08883</a> <span> [<a href="https://arxiv.org/pdf/1610.08883">pdf</a>, <a href="https://arxiv.org/format/1610.08883">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Instrumentation and Detectors">physics.ins-det</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="High Energy Physics - Experiment">hep-ex</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Nuclear Experiment">nucl-ex</span> </div> </div> <p class="title is-5 mathjax"> PandaX-III: Searching for Neutrinoless Double Beta Decay with High Pressure $^{136}$Xe Gas Time Projection Chambers </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Chen%2C+X">Xun Chen</a>, <a href="/search/physics?searchtype=author&query=Fu%2C+C">Changbo Fu</a>, <a href="/search/physics?searchtype=author&query=Galan%2C+J">Javier Galan</a>, <a href="/search/physics?searchtype=author&query=Giboni%2C+K">Karl Giboni</a>, <a href="/search/physics?searchtype=author&query=Giuliani%2C+F">Franco Giuliani</a>, <a href="/search/physics?searchtype=author&query=Gu%2C+L">Linghui Gu</a>, <a href="/search/physics?searchtype=author&query=Han%2C+K">Ke Han</a>, <a href="/search/physics?searchtype=author&query=Ji%2C+X">Xiangdong Ji</a>, <a href="/search/physics?searchtype=author&query=Lin%2C+H">Heng Lin</a>, <a href="/search/physics?searchtype=author&query=Liu%2C+J">Jianglai Liu</a>, <a href="/search/physics?searchtype=author&query=Ni%2C+K">Kaixiang Ni</a>, <a href="/search/physics?searchtype=author&query=Kusano%2C+H">Hiroki Kusano</a>, <a href="/search/physics?searchtype=author&query=Ren%2C+X">Xiangxiang Ren</a>, <a href="/search/physics?searchtype=author&query=Wang%2C+S">Shaobo Wang</a>, <a href="/search/physics?searchtype=author&query=Yang%2C+Y">Yong Yang</a>, <a href="/search/physics?searchtype=author&query=Zhang%2C+D">Dan Zhang</a>, <a href="/search/physics?searchtype=author&query=Zhang%2C+T">Tao Zhang</a>, <a href="/search/physics?searchtype=author&query=Zhao%2C+L">Li Zhao</a>, <a href="/search/physics?searchtype=author&query=Sun%2C+X">Xiangming Sun</a>, <a href="/search/physics?searchtype=author&query=Hu%2C+S">Shouyang Hu</a>, <a href="/search/physics?searchtype=author&query=Jian%2C+S">Siyu Jian</a>, <a href="/search/physics?searchtype=author&query=Li%2C+X">Xinglong Li</a>, <a href="/search/physics?searchtype=author&query=Li%2C+X">Xiaomei Li</a>, <a href="/search/physics?searchtype=author&query=Liang%2C+H">Hao Liang</a>, <a href="/search/physics?searchtype=author&query=Zhang%2C+H">Huanqiao Zhang</a> , et al. (45 additional authors not shown) </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="1610.08883v2-abstract-short" style="display: inline;"> Searching for the Neutrinoless Double Beta Decay (NLDBD) is now regarded as the topmost promising technique to explore the nature of neutrinos after the discovery of neutrino masses in oscillation experiments. PandaX-III (Particle And Astrophysical Xenon Experiment III) will search for the NLDBD of $^{136}$Xe at the China Jin Ping underground Laboratory (CJPL). In the first phase of the experiment… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1610.08883v2-abstract-full').style.display = 'inline'; document.getElementById('1610.08883v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1610.08883v2-abstract-full" style="display: none;"> Searching for the Neutrinoless Double Beta Decay (NLDBD) is now regarded as the topmost promising technique to explore the nature of neutrinos after the discovery of neutrino masses in oscillation experiments. PandaX-III (Particle And Astrophysical Xenon Experiment III) will search for the NLDBD of $^{136}$Xe at the China Jin Ping underground Laboratory (CJPL). In the first phase of the experiment, a high pressure gas Time Projection Chamber (TPC) will contain 200 kg, 90% $^{136}$Xe enriched gas operated at 10 bar. Fine pitch micro-pattern gas detector (Microbulk Micromegas) will be used at both ends of the TPC for the charge readout with a cathode in the middle. Charge signals can be used to reconstruct tracks of NLDBD events and provide good energy and spatial resolution. The detector will be immersed in a large water tank to ensure $\sim$5 m of water shielding in all directions. The second phase, a ton-scale experiment, will consist of five TPCs in the same water tank, with improved energy resolution and better control over backgrounds. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1610.08883v2-abstract-full').style.display = 'none'; document.getElementById('1610.08883v2-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 27 October, 2016; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 27 October, 2016; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> October 2016. </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1610.02396">arXiv:1610.02396</a> <span> [<a href="https://arxiv.org/pdf/1610.02396">pdf</a>, <a href="https://arxiv.org/format/1610.02396">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Instrumentation and Detectors">physics.ins-det</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Cosmology and Nongalactic Astrophysics">astro-ph.CO</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Instrumentation and Methods for Astrophysics">astro-ph.IM</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="High Energy Physics - Experiment">hep-ex</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1016/j.physrep.2016.10.001">10.1016/j.physrep.2016.10.001 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Readout technologies for directional WIMP Dark Matter detection </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Battat%2C+J+B+R">J. B. R. Battat</a>, <a href="/search/physics?searchtype=author&query=Irastorza%2C+I+G">I. G. Irastorza</a>, <a href="/search/physics?searchtype=author&query=Aleksandrov%2C+A">A. Aleksandrov</a>, <a href="/search/physics?searchtype=author&query=Guler%2C+M+A">M. Ali Guler</a>, <a href="/search/physics?searchtype=author&query=Asada%2C+T">T. Asada</a>, <a href="/search/physics?searchtype=author&query=Baracchini%2C+E">E. Baracchini</a>, <a href="/search/physics?searchtype=author&query=Billard%2C+J">J. Billard</a>, <a href="/search/physics?searchtype=author&query=Bosson%2C+G">G. Bosson</a>, <a href="/search/physics?searchtype=author&query=Bourrion%2C+O">O. Bourrion</a>, <a href="/search/physics?searchtype=author&query=Bouvier%2C+J">J. Bouvier</a>, <a href="/search/physics?searchtype=author&query=Buonaura%2C+A">A. Buonaura</a>, <a href="/search/physics?searchtype=author&query=Burdge%2C+K">K. Burdge</a>, <a href="/search/physics?searchtype=author&query=Cebrian%2C+S">S. Cebrian</a>, <a href="/search/physics?searchtype=author&query=Colas%2C+P">P. Colas</a>, <a href="/search/physics?searchtype=author&query=Consiglio%2C+L">L. Consiglio</a>, <a href="/search/physics?searchtype=author&query=Dafni%2C+T">T. Dafni</a>, <a href="/search/physics?searchtype=author&query=D%27Ambrosio%2C+N">N. D'Ambrosio</a>, <a href="/search/physics?searchtype=author&query=Deaconu%2C+C">C. Deaconu</a>, <a href="/search/physics?searchtype=author&query=De+Lellis%2C+G">G. De Lellis</a>, <a href="/search/physics?searchtype=author&query=Descombes%2C+T">T. Descombes</a>, <a href="/search/physics?searchtype=author&query=Di+Crescenzo%2C+A">A. Di Crescenzo</a>, <a href="/search/physics?searchtype=author&query=Di+Marco%2C+N">N. Di Marco</a>, <a href="/search/physics?searchtype=author&query=Druitt%2C+G">G. Druitt</a>, <a href="/search/physics?searchtype=author&query=Eggleston%2C+R">R. Eggleston</a>, <a href="/search/physics?searchtype=author&query=Ferrer-Ribas%2C+E">E. Ferrer-Ribas</a> , et al. (68 additional authors not shown) </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="1610.02396v1-abstract-short" style="display: inline;"> The measurement of the direction of WIMP-induced nuclear recoils is a compelling but technologically challenging strategy to provide an unambiguous signature of the detection of Galactic dark matter. Most directional detectors aim to reconstruct the dark-matter-induced nuclear recoil tracks, either in gas or solid targets. The main challenge with directional detection is the need for high spatial… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1610.02396v1-abstract-full').style.display = 'inline'; document.getElementById('1610.02396v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1610.02396v1-abstract-full" style="display: none;"> The measurement of the direction of WIMP-induced nuclear recoils is a compelling but technologically challenging strategy to provide an unambiguous signature of the detection of Galactic dark matter. Most directional detectors aim to reconstruct the dark-matter-induced nuclear recoil tracks, either in gas or solid targets. The main challenge with directional detection is the need for high spatial resolution over large volumes, which puts strong requirements on the readout technologies. In this paper we review the various detector readout technologies used by directional detectors. In particular, we summarize the challenges, advantages and drawbacks of each approach, and discuss future prospects for these technologies. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1610.02396v1-abstract-full').style.display = 'none'; document.getElementById('1610.02396v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 6 October, 2016; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> October 2016. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">58 pages, 26 figures, accepted by Physics Reports</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Physics Reports 662 (2016) pp. 1-46 </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1609.06459">arXiv:1609.06459</a> <span> [<a href="https://arxiv.org/pdf/1609.06459">pdf</a>, <a href="https://arxiv.org/ps/1609.06459">ps</a>, <a href="https://arxiv.org/format/1609.06459">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Instrumentation and Detectors">physics.ins-det</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="High Energy Physics - Experiment">hep-ex</span> </div> </div> <p class="title is-5 mathjax"> Micromegas for dark matter searches: CAST/IAXO & TREX-DM </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Garza%2C+J+G">J. G. Garza</a>, <a href="/search/physics?searchtype=author&query=Aune%2C+S">S. Aune</a>, <a href="/search/physics?searchtype=author&query=Castel%2C+J+F">J. F. Castel</a>, <a href="/search/physics?searchtype=author&query=Cebri%C3%A1n%2C+S">S. Cebri谩n</a>, <a href="/search/physics?searchtype=author&query=Dafni%2C+T">T. Dafni</a>, <a href="/search/physics?searchtype=author&query=Ferrer-Ribas%2C+E">E. Ferrer-Ribas</a>, <a href="/search/physics?searchtype=author&query=Gal%C3%A1n%2C+J">J. Gal谩n</a>, <a href="/search/physics?searchtype=author&query=Garc%C3%ADa%2C+J+A">J. A. Garc铆a</a>, <a href="/search/physics?searchtype=author&query=Giomataris%2C+I">I. Giomataris</a>, <a href="/search/physics?searchtype=author&query=Iguaz%2C+F+J">F. J. Iguaz</a>, <a href="/search/physics?searchtype=author&query=Irastorza%2C+I+G">I. G. Irastorza</a>, <a href="/search/physics?searchtype=author&query=Luz%C3%B3n%2C+G">G. Luz贸n</a>, <a href="/search/physics?searchtype=author&query=Mirallas%2C+H">H. Mirallas</a>, <a href="/search/physics?searchtype=author&query=Papaevangelou%2C+T">T. Papaevangelou</a>, <a href="/search/physics?searchtype=author&query=Peir%C3%B3%2C+A">A. Peir贸</a>, <a href="/search/physics?searchtype=author&query=Tom%C3%A1s%2C+A">A. Tom谩s</a>, <a href="/search/physics?searchtype=author&query=Vafeiadis%2C+T">T. Vafeiadis</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="1609.06459v1-abstract-short" style="display: inline;"> The most compelling candidates for Dark Matter to day are WIMPs and axions. The applicability of gasesous Time Projection Chambers (TPCs) with Micromesh Gas Structures (Micromegas) to the search of these particles is explored within this work. Both particles would produce an extremely low rate at very low energies in particle detectors. Micromegas detectors can provide both low background rates an… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1609.06459v1-abstract-full').style.display = 'inline'; document.getElementById('1609.06459v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1609.06459v1-abstract-full" style="display: none;"> The most compelling candidates for Dark Matter to day are WIMPs and axions. The applicability of gasesous Time Projection Chambers (TPCs) with Micromesh Gas Structures (Micromegas) to the search of these particles is explored within this work. Both particles would produce an extremely low rate at very low energies in particle detectors. Micromegas detectors can provide both low background rates and low en- ergy threshold, due to the high granularity, radiopurity and uniformity of the readout. Small (few cm wide) Micromegas detectors are used to image the axion-induced x-ray signal expected in the CERN Axion Solar Telescope (CAST) experiment. We show the background levels obtained in CAST and the prospects to further reduce them to the values required by the Internation Axion Observatory (IAXO). We also present TREX-DM, a scaled-up version of the Micromegas used in axion research, but this time dedicated to the low-mass WIMP detection. TREX-DM is a high-pressure Micromegas-based TPC designed to host a few hundreds of grams of light nuclei (argon or neon) with energy thresholds potentially at the level of 100 eV. The detector is described in detail, as well as the results of the commissioning and characterization phase on surface. Besides, the back- ground model of TREX-DM is presented, along with the anticipated sensitivity of this search, which could go beyond current experimental limits. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1609.06459v1-abstract-full').style.display = 'none'; document.getElementById('1609.06459v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 21 September, 2016; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> September 2016. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">4 pages, 5 figures. 4th International Conference on Micro Pattern Gaseous Detectors. (Trieste, 12-15 October 2015)</span> </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1601.00123">arXiv:1601.00123</a> <span> [<a href="https://arxiv.org/pdf/1601.00123">pdf</a>, <a href="https://arxiv.org/ps/1601.00123">ps</a>, <a href="https://arxiv.org/format/1601.00123">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Instrumentation and Detectors">physics.ins-det</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="High Energy Physics - Experiment">hep-ex</span> </div> </div> <p class="title is-5 mathjax"> Fast Timing for High-Rate Environments with Micromegas </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Papaevangelou%2C+T">Thomas Papaevangelou</a>, <a href="/search/physics?searchtype=author&query=Desforge%2C+D">Daniel Desforge</a>, <a href="/search/physics?searchtype=author&query=Ferrer-Ribas%2C+E">Esther Ferrer-Ribas</a>, <a href="/search/physics?searchtype=author&query=Giomataris%2C+I">Ioannis Giomataris</a>, <a href="/search/physics?searchtype=author&query=Godinot%2C+C">Cyprien Godinot</a>, <a href="/search/physics?searchtype=author&query=Diaz%2C+D+G">Diego Gonzalez Diaz</a>, <a href="/search/physics?searchtype=author&query=Gustavsson%2C+T">Thomas Gustavsson</a>, <a href="/search/physics?searchtype=author&query=Kebbiri%2C+M">Mariam Kebbiri</a>, <a href="/search/physics?searchtype=author&query=Oliveri%2C+E">Eraldo Oliveri</a>, <a href="/search/physics?searchtype=author&query=Resnati%2C+F">Filippo Resnati</a>, <a href="/search/physics?searchtype=author&query=Ropelewski%2C+L">Leszek Ropelewski</a>, <a href="/search/physics?searchtype=author&query=Tsiledakis%2C+G">Georgios Tsiledakis</a>, <a href="/search/physics?searchtype=author&query=Veenhof%2C+R">Rob Veenhof</a>, <a href="/search/physics?searchtype=author&query=White%2C+S">Sebastian White</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="1601.00123v2-abstract-short" style="display: inline;"> The current state of the art in fast timing resolution for existing experiments is of the order of 100 ps on the time of arrival of both charged particles and electromagnetic showers. Current R&D on charged particle timing is approaching the level of 10 ps but is not primarily directed at sustained performance at high rates and under high radiation (as would be needed for HL-LHC pileup mitigation)… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1601.00123v2-abstract-full').style.display = 'inline'; document.getElementById('1601.00123v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1601.00123v2-abstract-full" style="display: none;"> The current state of the art in fast timing resolution for existing experiments is of the order of 100 ps on the time of arrival of both charged particles and electromagnetic showers. Current R&D on charged particle timing is approaching the level of 10 ps but is not primarily directed at sustained performance at high rates and under high radiation (as would be needed for HL-LHC pileup mitigation). We demonstrate a Micromegas based solution to reach this level of performance. The Micromegas acts as a photomultiplier coupled to a Cerenkov-radiator front window, which produces sufficient UV photons to convert the ~100 ps single-photoelectron jitter into a timing response of the order of 10-20 ps per incident charged particle. A prototype has been built in order to demonstrate this performance. The first laboratory tests with a pico-second laser have shown a time resolution of the order of 27 ps for ~50 primary photoelectrons, using a bulk Micromegas readout. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1601.00123v2-abstract-full').style.display = 'none'; document.getElementById('1601.00123v2-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 12 January, 2016; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 1 January, 2016; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> January 2016. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">MPGD2015 (4th Conference on Micro-Pattern Gaseous Detectors, Trieste, Italy, 12 - 15 October, 2015). 5 pages, 8 figures</span> </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1509.06190">arXiv:1509.06190</a> <span> [<a href="https://arxiv.org/pdf/1509.06190">pdf</a>, <a href="https://arxiv.org/format/1509.06190">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Instrumentation and Detectors">physics.ins-det</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Instrumentation and Methods for Astrophysics">astro-ph.IM</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="High Energy Physics - Experiment">hep-ex</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1088/1475-7516/2015/12/008">10.1088/1475-7516/2015/12/008 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> A Micromegas-based low-background x-ray detector coupled to a slumped-glass telescope for axion research </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Aznar%2C+F">F. Aznar</a>, <a href="/search/physics?searchtype=author&query=Castel%2C+J">J. Castel</a>, <a href="/search/physics?searchtype=author&query=Christensen%2C+F+E">F. E. Christensen</a>, <a href="/search/physics?searchtype=author&query=Dafni%2C+T">T. Dafni</a>, <a href="/search/physics?searchtype=author&query=Decker%2C+T+A">T. A. Decker</a>, <a href="/search/physics?searchtype=author&query=Ferrer-Ribas%2C+E">E. Ferrer-Ribas</a>, <a href="/search/physics?searchtype=author&query=Garcia%2C+J+A">J. A. Garcia</a>, <a href="/search/physics?searchtype=author&query=Giomataris%2C+I">I. Giomataris</a>, <a href="/search/physics?searchtype=author&query=Gracia%2C+J+G">J. G. Gracia</a>, <a href="/search/physics?searchtype=author&query=Hailey%2C+C+J">C. J. Hailey</a>, <a href="/search/physics?searchtype=author&query=Hill%2C+R+M">R. M. Hill</a>, <a href="/search/physics?searchtype=author&query=Iguaz%2C+F+J">F. J. Iguaz</a>, <a href="/search/physics?searchtype=author&query=Irastorza%2C+I+G">I. G. Irastorza</a>, <a href="/search/physics?searchtype=author&query=Jakobsen%2C+A+C">A. C. Jakobsen</a>, <a href="/search/physics?searchtype=author&query=Luzon%2C+G">G. Luzon</a>, <a href="/search/physics?searchtype=author&query=Mirallas%2C+H">H. Mirallas</a>, <a href="/search/physics?searchtype=author&query=Papaevangelou%2C+T">T. Papaevangelou</a>, <a href="/search/physics?searchtype=author&query=Pivovaroff%2C+M+J">M. J. Pivovaroff</a>, <a href="/search/physics?searchtype=author&query=Ruz%2C+J">J. Ruz</a>, <a href="/search/physics?searchtype=author&query=Vafeiadis%2C+T">T. Vafeiadis</a>, <a href="/search/physics?searchtype=author&query=Vogel%2C+J+K">J. K. Vogel</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="1509.06190v1-abstract-short" style="display: inline;"> We report on the design, construction and operation of a low background x-ray detection line composed of a shielded Micromegas (micromesh gaseous structure) detector of the microbulk technique. The detector is made from radiopure materials and is placed at the focal point of a $\sim$~5 cm diameter, 1.3 m focal-length, cone-approximation Wolter I x-ray telescope (XRT) comprised of thermally-formed… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1509.06190v1-abstract-full').style.display = 'inline'; document.getElementById('1509.06190v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1509.06190v1-abstract-full" style="display: none;"> We report on the design, construction and operation of a low background x-ray detection line composed of a shielded Micromegas (micromesh gaseous structure) detector of the microbulk technique. The detector is made from radiopure materials and is placed at the focal point of a $\sim$~5 cm diameter, 1.3 m focal-length, cone-approximation Wolter I x-ray telescope (XRT) comprised of thermally-formed (or "slumped") glass substrates deposited with multilayer coatings. The system has been conceived as a technological pathfinder for the future International Axion Observatory (IAXO), as it combines two of the techniques (optic and detector) proposed in the conceptual design of the project. It is innovative for two reasons: it is the first time an x-ray optic has been designed and fabricated specifically for axion research, and the first time a Micromegas detector has been operated with an x-ray optic. The line has been installed at one end of the CERN Axion Solar Telescope (CAST) magnet and is currently looking for solar axions. The combination of the XRT and Micromegas detector provides the best signal-to-noise ratio obtained so far by any detection system of the CAST experiment with a background rate of 5.4$\times$10$^{-3}\;$counts per hour in the energy region-of-interest and signal spot area. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1509.06190v1-abstract-full').style.display = 'none'; document.getElementById('1509.06190v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 21 September, 2015; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> September 2015. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">21 pages, 16 figures</span> </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1508.03006">arXiv:1508.03006</a> <span> [<a href="https://arxiv.org/pdf/1508.03006">pdf</a>, <a href="https://arxiv.org/format/1508.03006">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Instrumentation and Methods for Astrophysics">astro-ph.IM</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Instrumentation and Detectors">physics.ins-det</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1088/1475-7516/2015/12/012">10.1088/1475-7516/2015/12/012 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Exploring 0.1-10$\,$eV axions with a new helioscope concept </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Gal%C3%A1n%2C+J">J. Gal谩n</a>, <a href="/search/physics?searchtype=author&query=Dafni%2C+T">T. Dafni</a>, <a href="/search/physics?searchtype=author&query=Ferrer-Ribas%2C+E">E. Ferrer-Ribas</a>, <a href="/search/physics?searchtype=author&query=Giomataris%2C+I">I. Giomataris</a>, <a href="/search/physics?searchtype=author&query=Iguaz%2C+F+J">F. J. Iguaz</a>, <a href="/search/physics?searchtype=author&query=Irastorza%2C+I+G">I. G. Irastorza</a>, <a href="/search/physics?searchtype=author&query=Garc%C3%ADa%2C+J+A">J. A. Garc铆a</a>, <a href="/search/physics?searchtype=author&query=Gracia%2C+J">J. Gracia</a>, <a href="/search/physics?searchtype=author&query=Luz%C3%B3n%2C+G">G. Luz贸n</a>, <a href="/search/physics?searchtype=author&query=Papaevangelou%2C+T">T. Papaevangelou</a>, <a href="/search/physics?searchtype=author&query=Redondo%2C+J">J. Redondo</a>, <a href="/search/physics?searchtype=author&query=Tom%C3%A1s%2C+A">A. Tom谩s</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="1508.03006v2-abstract-short" style="display: inline;"> We explore the possibility to develop a new axion helioscope type, sensitive to the higher axion mass region favored by axion models. We propose to use a low background large volume TPC immersed in an intense magnetic field. Contrary to traditional tracking helioscopes, this detection technique takes advantage of the capability to directly detect the photons converted on the buffer gas which defin… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1508.03006v2-abstract-full').style.display = 'inline'; document.getElementById('1508.03006v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1508.03006v2-abstract-full" style="display: none;"> We explore the possibility to develop a new axion helioscope type, sensitive to the higher axion mass region favored by axion models. We propose to use a low background large volume TPC immersed in an intense magnetic field. Contrary to traditional tracking helioscopes, this detection technique takes advantage of the capability to directly detect the photons converted on the buffer gas which defines the axion mass sensitivity region, and does not require pointing the magnet to the Sun. The operation flexibility of a TPC to be used with different gas mixtures (He, Ne, Xe, etc) and pressures (from 10 mbar to 10 bar) will allow to enhance sensitivity for axion masses from few meV to several eV. We present different helioscope data taking scenarios, considering detection efficiency and axion absorption probability, and show the sensitivities reachable with this technique to be few $\times$ 10$^{-11}\,$GeV$^{-1}$ for a 5$\,$T$\,$m$^3$ scale TPC. We show that a few years program taking data with such setup would allow to probe the KSVZ axion model for axion masses above 100 meV. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1508.03006v2-abstract-full').style.display = 'none'; document.getElementById('1508.03006v2-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 7 September, 2015; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 12 August, 2015; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> August 2015. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">prepared for submission to JCAP</span> </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1504.05865">arXiv:1504.05865</a> <span> [<a href="https://arxiv.org/pdf/1504.05865">pdf</a>, <a href="https://arxiv.org/format/1504.05865">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Instrumentation and Methods for Astrophysics">astro-ph.IM</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Nuclear Experiment">nucl-ex</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Instrumentation and Detectors">physics.ins-det</span> </div> </div> <p class="title is-5 mathjax"> First detection of tracks of radon progeny recoils by MIMAC </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Riffard%2C+Q">Q. Riffard</a>, <a href="/search/physics?searchtype=author&query=Santos%2C+D">D. Santos</a>, <a href="/search/physics?searchtype=author&query=Bosson%2C+G">G. Bosson</a>, <a href="/search/physics?searchtype=author&query=Bourrion%2C+O">O. Bourrion</a>, <a href="/search/physics?searchtype=author&query=Descombes%2C+T">T. Descombes</a>, <a href="/search/physics?searchtype=author&query=Fourel%2C+C">C. Fourel</a>, <a href="/search/physics?searchtype=author&query=Guillaudin%2C+O">O. Guillaudin</a>, <a href="/search/physics?searchtype=author&query=Muraz%2C+J+-">J. -F. Muraz</a>, <a href="/search/physics?searchtype=author&query=Colas%2C+P">P. Colas</a>, <a href="/search/physics?searchtype=author&query=Ferrer-Ribas%2C+E">E. Ferrer-Ribas</a>, <a href="/search/physics?searchtype=author&query=Giomataris%2C+I">I. Giomataris</a>, <a href="/search/physics?searchtype=author&query=Busto%2C+J">J. Busto</a>, <a href="/search/physics?searchtype=author&query=Fouchez%2C+D">D. Fouchez</a>, <a href="/search/physics?searchtype=author&query=Tao%2C+C">C. Tao</a>, <a href="/search/physics?searchtype=author&query=Lebreton%2C+L">L. Lebreton</a>, <a href="/search/physics?searchtype=author&query=Maire%2C+D">D. Maire</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="1504.05865v2-abstract-short" style="display: inline;"> The MIMAC experiment is a $渭$-TPC matrix project for directional dark matter search. Directional detection is a strategy based on the measurement of the WIMP flux anisotropy due to the solar system motion with respect to the dark matter halo. The main purpose of MIMAC project is the measurement of the energy and the direction of nuclear recoils in 3D produced by elastic scattering of WIMPs. Since… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1504.05865v2-abstract-full').style.display = 'inline'; document.getElementById('1504.05865v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1504.05865v2-abstract-full" style="display: none;"> The MIMAC experiment is a $渭$-TPC matrix project for directional dark matter search. Directional detection is a strategy based on the measurement of the WIMP flux anisotropy due to the solar system motion with respect to the dark matter halo. The main purpose of MIMAC project is the measurement of the energy and the direction of nuclear recoils in 3D produced by elastic scattering of WIMPs. Since June 2012 a bi-chamber prototype is operating at the Modane underground laboratory. In this paper, we report the first ionization energy and 3D track observations of nuclear recoils produced by the radon progeny. This measurement shows the capability of the MIMAC detector and opens the possibility to explore the low energy recoil directionality signature. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1504.05865v2-abstract-full').style.display = 'none'; document.getElementById('1504.05865v2-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 20 June, 2017; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 22 April, 2015; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> April 2015. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">11 pages, 12 figures, submitted to PRD</span> </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1504.03678">arXiv:1504.03678</a> <span> [<a href="https://arxiv.org/pdf/1504.03678">pdf</a>, <a href="https://arxiv.org/ps/1504.03678">ps</a>, <a href="https://arxiv.org/format/1504.03678">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Instrumentation and Detectors">physics.ins-det</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1016/j.nima.2015.08.033">10.1016/j.nima.2015.08.033 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Accurate gamma and MeV-electron track reconstruction with an ultra-low diffusion Xenon/TMA TPC at 10 atmospheres </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Gonzalez-Diaz%2C+D">Diego Gonzalez-Diaz</a>, <a href="/search/physics?searchtype=author&query=Alvarez%2C+V">V. Alvarez</a>, <a href="/search/physics?searchtype=author&query=Borges%2C+F+I+G">F. I. G. Borges</a>, <a href="/search/physics?searchtype=author&query=Camargo%2C+M">M. Camargo</a>, <a href="/search/physics?searchtype=author&query=Carcel%2C+S">S. Carcel</a>, <a href="/search/physics?searchtype=author&query=Cebrian%2C+S">S. Cebrian</a>, <a href="/search/physics?searchtype=author&query=Cervera%2C+A">A. Cervera</a>, <a href="/search/physics?searchtype=author&query=Conde%2C+C+A+N">C. A. N. Conde</a>, <a href="/search/physics?searchtype=author&query=Dafni%2C+T">T. Dafni</a>, <a href="/search/physics?searchtype=author&query=Diaz%2C+J">J. Diaz</a>, <a href="/search/physics?searchtype=author&query=Esteve%2C+R">R. Esteve</a>, <a href="/search/physics?searchtype=author&query=Fernandes%2C+L+M+P">L. M. P. Fernandes</a>, <a href="/search/physics?searchtype=author&query=Ferrario%2C+P">P. Ferrario</a>, <a href="/search/physics?searchtype=author&query=Ferreira%2C+A+L">A. L. Ferreira</a>, <a href="/search/physics?searchtype=author&query=Freitas%2C+E+D+C">E. D. C. Freitas</a>, <a href="/search/physics?searchtype=author&query=Gehman%2C+V+M">V. M. Gehman</a>, <a href="/search/physics?searchtype=author&query=Goldschmidt%2C+A">A. Goldschmidt</a>, <a href="/search/physics?searchtype=author&query=Gomez-Cadenas%2C+J+J">J. J. Gomez-Cadenas</a>, <a href="/search/physics?searchtype=author&query=Gutierrez%2C+R+M">R. M. Gutierrez</a>, <a href="/search/physics?searchtype=author&query=Hauptman%2C+J">J. Hauptman</a>, <a href="/search/physics?searchtype=author&query=Morata%2C+J+A+H">J. A. Hernando Morata</a>, <a href="/search/physics?searchtype=author&query=Herrera%2C+D+C">D. C. Herrera</a>, <a href="/search/physics?searchtype=author&query=Irastorza%2C+I+G">I. G. Irastorza</a>, <a href="/search/physics?searchtype=author&query=Labarga%2C+L">L. Labarga</a>, <a href="/search/physics?searchtype=author&query=Laing%2C+A">A. Laing</a> , et al. (58 additional authors not shown) </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="1504.03678v2-abstract-short" style="display: inline;"> We report the performance of a 10 atm Xenon/trimethylamine time projection chamber (TPC) for the detection of X-rays (30 keV) and gamma-rays (0.511-1.275 MeV) in conjunction with the accurate tracking of the associated electrons. When operated at such a high pressure and in 1%-admixtures, trimethylamine (TMA) endows Xenon with an extremely low electron diffusion (1.3 +-0.13 mm-sigma (longitudinal)… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1504.03678v2-abstract-full').style.display = 'inline'; document.getElementById('1504.03678v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1504.03678v2-abstract-full" style="display: none;"> We report the performance of a 10 atm Xenon/trimethylamine time projection chamber (TPC) for the detection of X-rays (30 keV) and gamma-rays (0.511-1.275 MeV) in conjunction with the accurate tracking of the associated electrons. When operated at such a high pressure and in 1%-admixtures, trimethylamine (TMA) endows Xenon with an extremely low electron diffusion (1.3 +-0.13 mm-sigma (longitudinal), 0.8 +-0.15 mm-sigma (transverse) along 1 m drift) besides forming a convenient Penning-Fluorescent mixture. The TPC, that houses 1.1 kg of gas in its active volume, operated continuously for 100 live-days in charge amplification mode. The readout was performed through the recently introduced microbulk Micromegas technology and the AFTER chip, providing a 3D voxelization of 8mm x 8mm x 1.2mm for approximately 10 cm/MeV-long electron tracks. This work was developed as part of the R&D program of the NEXT collaboration for future detector upgrades in the search of the 0bbnu decay in 136Xe, specifically those based on novel gas mixtures. Therefore we ultimately focus on the calorimetric and topological properties of the reconstructed MeV-electron tracks. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1504.03678v2-abstract-full').style.display = 'none'; document.getElementById('1504.03678v2-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 17 June, 2015; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 14 April, 2015; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> April 2015. </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1504.03640">arXiv:1504.03640</a> <span> [<a href="https://arxiv.org/pdf/1504.03640">pdf</a>, <a href="https://arxiv.org/ps/1504.03640">ps</a>, <a href="https://arxiv.org/format/1504.03640">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Instrumentation and Detectors">physics.ins-det</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1088/1742-6596/650/1/012013">10.1088/1742-6596/650/1/012013 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Lessons from the operation of the "Penning-Fluorescent" TPC and prospects </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Gonzalez-Diaz%2C+D">Diego Gonzalez-Diaz</a>, <a href="/search/physics?searchtype=author&query=Aznar%2C+F">F. Aznar</a>, <a href="/search/physics?searchtype=author&query=Castel%2C+J">J. Castel</a>, <a href="/search/physics?searchtype=author&query=Cebrian%2C+S">S. Cebrian</a>, <a href="/search/physics?searchtype=author&query=Dafni%2C+T">T. Dafni</a>, <a href="/search/physics?searchtype=author&query=Garcia%2C+J+A">J. A. Garcia</a>, <a href="/search/physics?searchtype=author&query=Garza%2C+J+G">J. G. Garza</a>, <a href="/search/physics?searchtype=author&query=Gomez%2C+H">H. Gomez</a>, <a href="/search/physics?searchtype=author&query=Herrera%2C+D+C">D. C. Herrera</a>, <a href="/search/physics?searchtype=author&query=Iguaz%2C+F+J">F. J. Iguaz</a>, <a href="/search/physics?searchtype=author&query=Irastorza%2C+I+G">I. G. Irastorza</a>, <a href="/search/physics?searchtype=author&query=Lagraba%2C+A">A. Lagraba</a>, <a href="/search/physics?searchtype=author&query=Luzon%2C+G">G. Luzon</a>, <a href="/search/physics?searchtype=author&query=Rodriguez%2C+A">A. Rodriguez</a>, <a href="/search/physics?searchtype=author&query=Ruiz-Choliz%2C+E">E. Ruiz-Choliz</a>, <a href="/search/physics?searchtype=author&query=Segui%2C+L">L. Segui</a>, <a href="/search/physics?searchtype=author&query=Ferrer-Ribas%2C+A+T+E">A. Tomas E. Ferrer-Ribas</a>, <a href="/search/physics?searchtype=author&query=Giomataris%2C+I">I. Giomataris</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="1504.03640v2-abstract-short" style="display: inline;"> We have recently reported the development of a new type of high-pressure Xenon time projection chamber operated with an ultra-low diffusion mixture and that simultaneously displays Penning effect and fluorescence in the near-visible region (300 nm). The concept, dubbed `Penning-Fluorescent' TPC, allows the simultaneous reconstruction of primary charge and scintillation with high topological and ca… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1504.03640v2-abstract-full').style.display = 'inline'; document.getElementById('1504.03640v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1504.03640v2-abstract-full" style="display: none;"> We have recently reported the development of a new type of high-pressure Xenon time projection chamber operated with an ultra-low diffusion mixture and that simultaneously displays Penning effect and fluorescence in the near-visible region (300 nm). The concept, dubbed `Penning-Fluorescent' TPC, allows the simultaneous reconstruction of primary charge and scintillation with high topological and calorimetric fidelity. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1504.03640v2-abstract-full').style.display = 'none'; document.getElementById('1504.03640v2-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 15 May, 2015; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 14 April, 2015; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> April 2015. </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1503.05107">arXiv:1503.05107</a> <span> [<a href="https://arxiv.org/pdf/1503.05107">pdf</a>, <a href="https://arxiv.org/format/1503.05107">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Instrumentation and Detectors">physics.ins-det</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Nuclear Experiment">nucl-ex</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1088/1742-6596/650/1/012008">10.1088/1742-6596/650/1/012008 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Low Background Micromegas in CAST </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Garza%2C+J+G">J. G. Garza</a>, <a href="/search/physics?searchtype=author&query=Aune%2C+S">S. Aune</a>, <a href="/search/physics?searchtype=author&query=Calvet%2C+D">D. Calvet</a>, <a href="/search/physics?searchtype=author&query=Castel%2C+J+F">J. F. Castel</a>, <a href="/search/physics?searchtype=author&query=Christensen%2C+F+E">F. E. Christensen</a>, <a href="/search/physics?searchtype=author&query=Dafni%2C+T">T. Dafni</a>, <a href="/search/physics?searchtype=author&query=Davenport%2C+M">M. Davenport</a>, <a href="/search/physics?searchtype=author&query=Decker%2C+T">T. Decker</a>, <a href="/search/physics?searchtype=author&query=Ferrer-Ribas%2C+E">E. Ferrer-Ribas</a>, <a href="/search/physics?searchtype=author&query=Gal%C3%A1n%2C+J">J. Gal谩n</a>, <a href="/search/physics?searchtype=author&query=Garc%C3%ADa%2C+J+A">J. A. Garc铆a</a>, <a href="/search/physics?searchtype=author&query=Giomataris%2C+I">I. Giomataris</a>, <a href="/search/physics?searchtype=author&query=Hill%2C+R+M">R. M. Hill</a>, <a href="/search/physics?searchtype=author&query=Iguaz%2C+F+J">F. J. Iguaz</a>, <a href="/search/physics?searchtype=author&query=Irastorza%2C+I+G">I. G. Irastorza</a>, <a href="/search/physics?searchtype=author&query=Jakobsen%2C+A+C">A. C. Jakobsen</a>, <a href="/search/physics?searchtype=author&query=Jourde%2C+D">D. Jourde</a>, <a href="/search/physics?searchtype=author&query=Mirallas%2C+H">H. Mirallas</a>, <a href="/search/physics?searchtype=author&query=Ortega%2C+I">I. Ortega</a>, <a href="/search/physics?searchtype=author&query=Papaevangelou%2C+T">T. Papaevangelou</a>, <a href="/search/physics?searchtype=author&query=Pivovaroff%2C+M+J">M. J. Pivovaroff</a>, <a href="/search/physics?searchtype=author&query=Ruz%2C+J">J. Ruz</a>, <a href="/search/physics?searchtype=author&query=Tom%C3%A1s%2C+A">A. Tom谩s</a>, <a href="/search/physics?searchtype=author&query=Vafeiadis%2C+T">T. Vafeiadis</a>, <a href="/search/physics?searchtype=author&query=Vogel%2C+J+K">J. K. Vogel</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="1503.05107v1-abstract-short" style="display: inline;"> Solar axions could be converted into x-rays inside the strong magnetic field of an axion helioscope, triggering the detection of this elusive particle. Low background x-ray detectors are an essential component for the sensitivity of these searches. We report on the latest developments of the Micromegas detectors for the CERN Axion Solar Telescope (CAST), including technological pathfinder activiti… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1503.05107v1-abstract-full').style.display = 'inline'; document.getElementById('1503.05107v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1503.05107v1-abstract-full" style="display: none;"> Solar axions could be converted into x-rays inside the strong magnetic field of an axion helioscope, triggering the detection of this elusive particle. Low background x-ray detectors are an essential component for the sensitivity of these searches. We report on the latest developments of the Micromegas detectors for the CERN Axion Solar Telescope (CAST), including technological pathfinder activities for the future International Axion Observatory (IAXO). The use of low background techniques and the application of discrimination algorithms based on the high granularity of the readout have led to background levels below 10$^{-6}$ counts/keV/cm$^2$/s, more than a factor 100 lower than the first generation of Micromegas detectors. The best levels achieved at the Canfranc Underground Laboratory (LSC) are as low as 10$^{-7}$ counts/keV/cm$^2$/s, showing good prospects for the application of this technology in IAXO. The current background model, based on underground and surface measurements, is presented, as well as the strategies to further reduce the background level. Finally, we will describe the R&D paths to achieve sub-keV energy thresholds, which could broaden the physics case of axion helioscopes. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1503.05107v1-abstract-full').style.display = 'none'; document.getElementById('1503.05107v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 17 March, 2015; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> March 2015. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">6 pages, 3 figures, Large TPC Conference 2014, Paris</span> </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1503.04561">arXiv:1503.04561</a> <span> [<a href="https://arxiv.org/pdf/1503.04561">pdf</a>, <a href="https://arxiv.org/format/1503.04561">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Solar and Stellar Astrophysics">astro-ph.SR</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="High Energy Physics - Phenomenology">hep-ph</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Instrumentation and Detectors">physics.ins-det</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1016/j.physletb.2015.07.049">10.1016/j.physletb.2015.07.049 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Search for chameleons with CAST </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Anastassopoulos%2C+V">V. Anastassopoulos</a>, <a href="/search/physics?searchtype=author&query=Arik%2C+M">M. Arik</a>, <a href="/search/physics?searchtype=author&query=Aune%2C+S">S. Aune</a>, <a href="/search/physics?searchtype=author&query=Barth%2C+K">K. Barth</a>, <a href="/search/physics?searchtype=author&query=Belov%2C+A">A. Belov</a>, <a href="/search/physics?searchtype=author&query=Br%C3%A4uninger%2C+H">H. Br盲uninger</a>, <a href="/search/physics?searchtype=author&query=Cantatore%2C+G">G. Cantatore</a>, <a href="/search/physics?searchtype=author&query=Carmona%2C+J+M">J. M. Carmona</a>, <a href="/search/physics?searchtype=author&query=Cetin%2C+S+A">S. A. Cetin</a>, <a href="/search/physics?searchtype=author&query=Christensen%2C+F">F. Christensen</a>, <a href="/search/physics?searchtype=author&query=Collar%2C+J+I">J. I. Collar</a>, <a href="/search/physics?searchtype=author&query=Dafni%2C+T">T. Dafni</a>, <a href="/search/physics?searchtype=author&query=Davenport%2C+M">M. Davenport</a>, <a href="/search/physics?searchtype=author&query=Desch%2C+K">K. Desch</a>, <a href="/search/physics?searchtype=author&query=Dermenev%2C+A">A. Dermenev</a>, <a href="/search/physics?searchtype=author&query=Eleftheriadis%2C+C">C. Eleftheriadis</a>, <a href="/search/physics?searchtype=author&query=Fanourakis%2C+G">G. Fanourakis</a>, <a href="/search/physics?searchtype=author&query=Ferrer-Ribas%2C+E">E. Ferrer-Ribas</a>, <a href="/search/physics?searchtype=author&query=Friedrich%2C+P">P. Friedrich</a>, <a href="/search/physics?searchtype=author&query=Gal%C3%A1n%2C+J">J. Gal谩n</a>, <a href="/search/physics?searchtype=author&query=Garc%C3%ADa%2C+J+A">J. A. Garc铆a</a>, <a href="/search/physics?searchtype=author&query=Gardikiotis%2C+A">A. Gardikiotis</a>, <a href="/search/physics?searchtype=author&query=Garza%2C+J+G">J. G. Garza</a>, <a href="/search/physics?searchtype=author&query=Gazis%2C+E+N">E. N. Gazis</a>, <a href="/search/physics?searchtype=author&query=Geralis%2C+T">T. Geralis</a> , et al. (39 additional authors not shown) </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="1503.04561v2-abstract-short" style="display: inline;"> In this work we present a search for (solar) chameleons with the CERN Axion Solar Telescope (CAST). This novel experimental technique, in the field of dark energy research, exploits both the chameleon coupling to matter ($尾_{\rm m}$) and to photons ($尾_纬$) via the Primakoff effect. By reducing the X-ray detection energy threshold used for axions from 1$\,$keV to 400$\,$eV CAST became sensitive to… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1503.04561v2-abstract-full').style.display = 'inline'; document.getElementById('1503.04561v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1503.04561v2-abstract-full" style="display: none;"> In this work we present a search for (solar) chameleons with the CERN Axion Solar Telescope (CAST). This novel experimental technique, in the field of dark energy research, exploits both the chameleon coupling to matter ($尾_{\rm m}$) and to photons ($尾_纬$) via the Primakoff effect. By reducing the X-ray detection energy threshold used for axions from 1$\,$keV to 400$\,$eV CAST became sensitive to the converted solar chameleon spectrum which peaks around 600$\,$eV. Even though we have not observed any excess above background, we can provide a 95% C.L. limit for the coupling strength of chameleons to photons of $尾_纬\!\lesssim\!10^{11}$ for $1<尾_{\rm m}<10^6$. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1503.04561v2-abstract-full').style.display = 'none'; document.getElementById('1503.04561v2-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 18 March, 2016; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 16 March, 2015; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> March 2015. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">8 pages, 12 figures</span> </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1503.00610">arXiv:1503.00610</a> <span> [<a href="https://arxiv.org/pdf/1503.00610">pdf</a>, <a href="https://arxiv.org/ps/1503.00610">ps</a>, <a href="https://arxiv.org/format/1503.00610">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="High Energy Physics - Experiment">hep-ex</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Instrumentation and Detectors">physics.ins-det</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1103/PhysRevD.92.021101">10.1103/PhysRevD.92.021101 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> New solar axion search in CAST with $^4$He filling </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Arik%2C+M">M. Arik</a>, <a href="/search/physics?searchtype=author&query=Aune%2C+S">S. Aune</a>, <a href="/search/physics?searchtype=author&query=Barth%2C+K">K. Barth</a>, <a href="/search/physics?searchtype=author&query=Belov%2C+A">A. Belov</a>, <a href="/search/physics?searchtype=author&query=Br%7F%C3%A4uninger%2C+H">H. Br盲uninger</a>, <a href="/search/physics?searchtype=author&query=Bremer%2C+J">J. Bremer</a>, <a href="/search/physics?searchtype=author&query=Burwitz%2C+V">V. Burwitz</a>, <a href="/search/physics?searchtype=author&query=Cantatore%2C+G">G. Cantatore</a>, <a href="/search/physics?searchtype=author&query=Carmona%2C+J+M">J. M. Carmona</a>, <a href="/search/physics?searchtype=author&query=Cetin%2C+S+A">S. A. Cetin</a>, <a href="/search/physics?searchtype=author&query=Collar%2C+J+I">J. I. Collar</a>, <a href="/search/physics?searchtype=author&query=Da+Riva%2C+E">E. Da Riva</a>, <a href="/search/physics?searchtype=author&query=Dafni%2C+T">T. Dafni</a>, <a href="/search/physics?searchtype=author&query=Davenport%2C+M">M. Davenport</a>, <a href="/search/physics?searchtype=author&query=Dermenev%2C+A">A. Dermenev</a>, <a href="/search/physics?searchtype=author&query=Eleftheriadis%2C+C">C. Eleftheriadis</a>, <a href="/search/physics?searchtype=author&query=Elias%2C+N">N. Elias</a>, <a href="/search/physics?searchtype=author&query=Fanourakis%2C+G">G. Fanourakis</a>, <a href="/search/physics?searchtype=author&query=Ferrer-Ribas%2C+E">E. Ferrer-Ribas</a>, <a href="/search/physics?searchtype=author&query=Gal%C3%A1n%2C+J">J. Gal谩n</a>, <a href="/search/physics?searchtype=author&query=Garc%C3%ADa%2C+J+A">J. A. Garc铆a</a>, <a href="/search/physics?searchtype=author&query=Gardikiotis%2C+A">A. Gardikiotis</a>, <a href="/search/physics?searchtype=author&query=Garza%2C+J+G">J. G. Garza</a>, <a href="/search/physics?searchtype=author&query=Gazis%2C+E+N">E. N. Gazis</a>, <a href="/search/physics?searchtype=author&query=Geralis%2C+T">T. Geralis</a> , et al. (38 additional authors not shown) </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="1503.00610v2-abstract-short" style="display: inline;"> The CERN Axion Solar Telescope (CAST) searches for $a\to纬$ conversion in the 9 T magnetic field of a refurbished LHC test magnet that can be directed toward the Sun. Two parallel magnet bores can be filled with helium of adjustable pressure to match the X-ray refractive mass $m_纬$ to the axion search mass $m_a$. After the vacuum phase (2003--2004), which is optimal for $m_a\lesssim0.02$ eV, we use… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1503.00610v2-abstract-full').style.display = 'inline'; document.getElementById('1503.00610v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1503.00610v2-abstract-full" style="display: none;"> The CERN Axion Solar Telescope (CAST) searches for $a\to纬$ conversion in the 9 T magnetic field of a refurbished LHC test magnet that can be directed toward the Sun. Two parallel magnet bores can be filled with helium of adjustable pressure to match the X-ray refractive mass $m_纬$ to the axion search mass $m_a$. After the vacuum phase (2003--2004), which is optimal for $m_a\lesssim0.02$ eV, we used $^4$He in 2005--2007 to cover the mass range of 0.02--0.39 eV and $^3$He in 2009--2011 to scan from 0.39--1.17 eV. After improving the detectors and shielding, we returned to $^4$He in 2012 to investigate a narrow $m_a$ range around 0.2 eV ("candidate setting" of our earlier search) and 0.39--0.42 eV, the upper axion mass range reachable with $^4$He, to "cross the axion line" for the KSVZ model. We have improved the limit on the axion-photon coupling to $g_{a纬}< 1.47\times10^{-10} {\rm GeV}^{-1}$ (95% C.L.), depending on the pressure settings. Since 2013, we have returned to vacuum and aim for a significant increase in sensitivity. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1503.00610v2-abstract-full').style.display = 'none'; document.getElementById('1503.00610v2-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 11 June, 2015; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 2 March, 2015; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> March 2015. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">CAST Collaboration 6 pages 3 figures</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Phys. Rev. D 92, 021101 (2015) </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1501.01466">arXiv:1501.01466</a> <span> [<a href="https://arxiv.org/pdf/1501.01466">pdf</a>, <a href="https://arxiv.org/format/1501.01466">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Instrumentation and Methods for Astrophysics">astro-ph.IM</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="High Energy Physics - Experiment">hep-ex</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Instrumentation and Detectors">physics.ins-det</span> </div> </div> <p class="title is-5 mathjax"> Lowering the background level and the energy threshold of Micromegas x-ray detectors for axion searches </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Iguaz%2C+F+J">F. J. Iguaz</a>, <a href="/search/physics?searchtype=author&query=Aune%2C+S">S. Aune</a>, <a href="/search/physics?searchtype=author&query=Aznar%2C+F">F. Aznar</a>, <a href="/search/physics?searchtype=author&query=Castel%2C+J+F">J. F. Castel</a>, <a href="/search/physics?searchtype=author&query=Dafni%2C+T">T. Dafni</a>, <a href="/search/physics?searchtype=author&query=Davenport%2C+M">M. Davenport</a>, <a href="/search/physics?searchtype=author&query=Ferrer-Ribas%2C+E">E. Ferrer-Ribas</a>, <a href="/search/physics?searchtype=author&query=Galan%2C+J">J. Galan</a>, <a href="/search/physics?searchtype=author&query=Garcia%2C+J+A">J. A. Garcia</a>, <a href="/search/physics?searchtype=author&query=Garza%2C+J+G">J. G. Garza</a>, <a href="/search/physics?searchtype=author&query=Giomataris%2C+I">I. Giomataris</a>, <a href="/search/physics?searchtype=author&query=Irastorza%2C+I+G">I. G. Irastorza</a>, <a href="/search/physics?searchtype=author&query=Papaevangelou%2C+T">T. Papaevangelou</a>, <a href="/search/physics?searchtype=author&query=Rodriguez%2C+A">A. Rodriguez</a>, <a href="/search/physics?searchtype=author&query=Tomas%2C+A">A. Tomas</a>, <a href="/search/physics?searchtype=author&query=Vafeiadis%2C+T">T. Vafeiadis</a>, <a href="/search/physics?searchtype=author&query=Yildiz%2C+S+C">S. C. Yildiz</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="1501.01466v1-abstract-short" style="display: inline;"> Axion helioscopes search for solar axions by their conversion in x-rays in the presence of high magnetic fields. The use of low background x-ray detectors is an essential component contributing to the sensitivity of these searches. In this work, we review the recent advances on Micromegas detectors used in the CERN Axion Solar Telescope (CAST) and proposed for the future International Axion Observ… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1501.01466v1-abstract-full').style.display = 'inline'; document.getElementById('1501.01466v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1501.01466v1-abstract-full" style="display: none;"> Axion helioscopes search for solar axions by their conversion in x-rays in the presence of high magnetic fields. The use of low background x-ray detectors is an essential component contributing to the sensitivity of these searches. In this work, we review the recent advances on Micromegas detectors used in the CERN Axion Solar Telescope (CAST) and proposed for the future International Axion Observatory (IAXO). The actual setup in CAST has achieved background levels below 10$^{-6}$ keV$^{-1}$ cm$^{-2}$ s$^{-1}$, a factor 100 lower than the first generation of Micromegas detectors. This reduction is based on active and passive shielding techniques, the selection of radiopure materials, offline discrimination techniques and the high granularity of the readout. We describe in detail the background model of the detector, based on its operation at CAST site and at the Canfranc Underground Laboratory (LSC), as well as on Geant4 simulations. The best levels currently achieved at LSC are low than 10$^{-7}$ keV$^{-1}$ cm$^{-2}$ s$^{-1}$ and show good prospects for the application of this technology in IAXO. Finally, we present some ideas and results for reducing the energy threshold of these detectors below 1 keV, using high-transparent windows, autotrigger electronics and studying the cluster shape at different energies. As a high flux of axion-like-particles is expected in this energy range, a sub-keV threshold detector could enlarge the physics case of axion helioscopes. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1501.01466v1-abstract-full').style.display = 'none'; document.getElementById('1501.01466v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 7 January, 2015; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> January 2015. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">Proceedings of 3rd International Conference on Technology and Instrumentation in Particle Physics (TIPP 2014)</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Pos(TIPP2014) 295 </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1401.3233">arXiv:1401.3233</a> <span> [<a href="https://arxiv.org/pdf/1401.3233">pdf</a>, <a href="https://arxiv.org/format/1401.3233">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Instrumentation and Detectors">physics.ins-det</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="High Energy Physics - Experiment">hep-ex</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1088/1748-0221/9/05/T05002">10.1088/1748-0221/9/05/T05002 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Conceptual Design of the International Axion Observatory (IAXO) </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Armengaud%2C+E">E. Armengaud</a>, <a href="/search/physics?searchtype=author&query=Avignone%2C+F+T">F. T. Avignone</a>, <a href="/search/physics?searchtype=author&query=Betz%2C+M">M. Betz</a>, <a href="/search/physics?searchtype=author&query=Brax%2C+P">P. Brax</a>, <a href="/search/physics?searchtype=author&query=Brun%2C+P">P. Brun</a>, <a href="/search/physics?searchtype=author&query=Cantatore%2C+G">G. Cantatore</a>, <a href="/search/physics?searchtype=author&query=Carmona%2C+J+M">J. M. Carmona</a>, <a href="/search/physics?searchtype=author&query=Carosi%2C+G+P">G. P. Carosi</a>, <a href="/search/physics?searchtype=author&query=Caspers%2C+F">F. Caspers</a>, <a href="/search/physics?searchtype=author&query=Caspi%2C+S">S. Caspi</a>, <a href="/search/physics?searchtype=author&query=Cetin%2C+S+A">S. A. Cetin</a>, <a href="/search/physics?searchtype=author&query=Chelouche%2C+D">D. Chelouche</a>, <a href="/search/physics?searchtype=author&query=Christensen%2C+F+E">F. E. Christensen</a>, <a href="/search/physics?searchtype=author&query=Dael%2C+A">A. Dael</a>, <a href="/search/physics?searchtype=author&query=Dafni%2C+T">T. Dafni</a>, <a href="/search/physics?searchtype=author&query=Davenport%2C+M">M. Davenport</a>, <a href="/search/physics?searchtype=author&query=Derbin%2C+A+V">A. V. Derbin</a>, <a href="/search/physics?searchtype=author&query=Desch%2C+K">K. Desch</a>, <a href="/search/physics?searchtype=author&query=Diago%2C+A">A. Diago</a>, <a href="/search/physics?searchtype=author&query=D%C3%B6brich%2C+B">B. D枚brich</a>, <a href="/search/physics?searchtype=author&query=Dratchnev%2C+I">I. Dratchnev</a>, <a href="/search/physics?searchtype=author&query=Dudarev%2C+A">A. Dudarev</a>, <a href="/search/physics?searchtype=author&query=Eleftheriadis%2C+C">C. Eleftheriadis</a>, <a href="/search/physics?searchtype=author&query=Fanourakis%2C+G">G. Fanourakis</a>, <a href="/search/physics?searchtype=author&query=Ferrer-Ribas%2C+E">E. Ferrer-Ribas</a> , et al. (63 additional authors not shown) </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="1401.3233v1-abstract-short" style="display: inline;"> The International Axion Observatory (IAXO) will be a forth generation axion helioscope. As its primary physics goal, IAXO will look for axions or axion-like particles (ALPs) originating in the Sun via the Primakoff conversion of the solar plasma photons. In terms of signal-to-noise ratio, IAXO will be about 4-5 orders of magnitude more sensitive than CAST, currently the most powerful axion heliosc… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1401.3233v1-abstract-full').style.display = 'inline'; document.getElementById('1401.3233v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1401.3233v1-abstract-full" style="display: none;"> The International Axion Observatory (IAXO) will be a forth generation axion helioscope. As its primary physics goal, IAXO will look for axions or axion-like particles (ALPs) originating in the Sun via the Primakoff conversion of the solar plasma photons. In terms of signal-to-noise ratio, IAXO will be about 4-5 orders of magnitude more sensitive than CAST, currently the most powerful axion helioscope, reaching sensitivity to axion-photon couplings down to a few $\times 10^{-12}$ GeV$^{-1}$ and thus probing a large fraction of the currently unexplored axion and ALP parameter space. IAXO will also be sensitive to solar axions produced by mechanisms mediated by the axion-electron coupling $g_{ae}$ with sensitivity $-$for the first time$-$ to values of $g_{ae}$ not previously excluded by astrophysics. With several other possible physics cases, IAXO has the potential to serve as a multi-purpose facility for generic axion and ALP research in the next decade. In this paper we present the conceptual design of IAXO, which follows the layout of an enhanced axion helioscope, based on a purpose-built 20m-long 8-coils toroidal superconducting magnet. All the eight 60cm-diameter magnet bores are equipped with focusing x-ray optics, able to focus the signal photons into $\sim 0.2$ cm$^2$ spots that are imaged by ultra-low-background Micromegas x-ray detectors. The magnet is built into a structure with elevation and azimuth drives that will allow for solar tracking for $\sim$12 h each day. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1401.3233v1-abstract-full').style.display = 'none'; document.getElementById('1401.3233v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 14 January, 2014; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> January 2014. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">47 pages, submitted to JINST</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> JINST 9 (2014) T05002 </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1312.4282">arXiv:1312.4282</a> <span> [<a href="https://arxiv.org/pdf/1312.4282">pdf</a>, <a href="https://arxiv.org/format/1312.4282">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Instrumentation and Detectors">physics.ins-det</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1088/1748-0221/8/12/C12042">10.1088/1748-0221/8/12/C12042 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> X-ray detection with Micromegas with background levels below 10$^{-6}$ keV$^{-1}$cm$^{-2}$s$^{-1}$ </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Aune%2C+S">S. Aune</a>, <a href="/search/physics?searchtype=author&query=Aznar%2C+F">F. Aznar</a>, <a href="/search/physics?searchtype=author&query=Calvet%2C+D">D. Calvet</a>, <a href="/search/physics?searchtype=author&query=Dafni%2C+T">T. Dafni</a>, <a href="/search/physics?searchtype=author&query=Diago%2C+A">A. Diago</a>, <a href="/search/physics?searchtype=author&query=Druillole%2C+F">F. Druillole</a>, <a href="/search/physics?searchtype=author&query=Fanourakis%2C+G">G. Fanourakis</a>, <a href="/search/physics?searchtype=author&query=Ferrer-Ribas%2C+E">E. Ferrer-Ribas</a>, <a href="/search/physics?searchtype=author&query=Gal%C3%A1n%2C+J">J. Gal谩n</a>, <a href="/search/physics?searchtype=author&query=Garc%C3%ADa%2C+J+A">J. A. Garc铆a</a>, <a href="/search/physics?searchtype=author&query=Gardikiotis%2C+A">A. Gardikiotis</a>, <a href="/search/physics?searchtype=author&query=Garza%2C+J+G">J. G. Garza</a>, <a href="/search/physics?searchtype=author&query=Geralis%2C+T">T. Geralis</a>, <a href="/search/physics?searchtype=author&query=Giomataris%2C+I">I. Giomataris</a>, <a href="/search/physics?searchtype=author&query=G%C3%B3mez%2C+H">H. G贸mez</a>, <a href="/search/physics?searchtype=author&query=Gonz%C3%A1lez-D%C3%ADaz%2C+D">D. Gonz谩lez-D铆az</a>, <a href="/search/physics?searchtype=author&query=Herrera%2C+D+C">D. C. Herrera</a>, <a href="/search/physics?searchtype=author&query=Iguaz%2C+F+J">F. J. Iguaz</a>, <a href="/search/physics?searchtype=author&query=Irastorza%2C+I+G">I. G. Irastorza</a>, <a href="/search/physics?searchtype=author&query=Jourde%2C+D">D. Jourde</a>, <a href="/search/physics?searchtype=author&query=Luz%C3%B3n%2C+G">G. Luz贸n</a>, <a href="/search/physics?searchtype=author&query=Mirallas%2C+H">H. Mirallas</a>, <a href="/search/physics?searchtype=author&query=Mols%2C+J+P">J. P. Mols</a>, <a href="/search/physics?searchtype=author&query=Papaevangelou%2C+T">T. Papaevangelou</a>, <a href="/search/physics?searchtype=author&query=Rodr%C3%ADguez%2C+A">A. Rodr铆guez</a> , et al. (4 additional authors not shown) </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="1312.4282v1-abstract-short" style="display: inline;"> Micromegas detectors are an optimum technological choice for the detection of low energy x-rays. The low background techniques applied to these detectors yielded remarkable background reductions over the years, being the CAST experiment beneficiary of these developments. In this document we report on the latest upgrades towards further background reductions and better understanding of the detector… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1312.4282v1-abstract-full').style.display = 'inline'; document.getElementById('1312.4282v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1312.4282v1-abstract-full" style="display: none;"> Micromegas detectors are an optimum technological choice for the detection of low energy x-rays. The low background techniques applied to these detectors yielded remarkable background reductions over the years, being the CAST experiment beneficiary of these developments. In this document we report on the latest upgrades towards further background reductions and better understanding of the detectors' response. The upgrades encompass the readout electronics, a new detector design and the implementation of a more efficient cosmic muon veto system. Background levels below 10$^{-6}$keV$^{-1}$cm$^{-2}$s$^{-1}$ have been obtained at sea level for the first time, demonstrating the feasibility of the expectations posed by IAXO, the next generation axion helioscope. Some results obtained with a set of measurements conducted in the x-ray beam of the CAST Detector Laboratory will be also presented and discussed. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1312.4282v1-abstract-full').style.display = 'none'; document.getElementById('1312.4282v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 16 December, 2013; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> December 2013. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> JINST 8 (2013) C12042 </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1311.3535">arXiv:1311.3535</a> <span> [<a href="https://arxiv.org/pdf/1311.3535">pdf</a>, <a href="https://arxiv.org/ps/1311.3535">ps</a>, <a href="https://arxiv.org/format/1311.3535">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Instrumentation and Detectors">physics.ins-det</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1088/1748-0221/9/04/C04015">10.1088/1748-0221/9/04/C04015 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Characterization of a medium size Xe/TMA TPC instrumented with microbulk Micromegas, using low-energy $纬$-rays </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=The+NEXT+collaboration"> The NEXT collaboration</a>, <a href="/search/physics?searchtype=author&query=Alvarez%2C+V">V. Alvarez</a>, <a href="/search/physics?searchtype=author&query=Borges%2C+F+I+G+M">F. I. G. M. Borges</a>, <a href="/search/physics?searchtype=author&query=Carcel%2C+S">S. Carcel</a>, <a href="/search/physics?searchtype=author&query=Castel%2C+J">J. Castel</a>, <a href="/search/physics?searchtype=author&query=Cebrian%2C+S">S. Cebrian</a>, <a href="/search/physics?searchtype=author&query=Cervera%2C+A">A. Cervera</a>, <a href="/search/physics?searchtype=author&query=Conde%2C+C+A+N">C. A. N. Conde</a>, <a href="/search/physics?searchtype=author&query=Dafni%2C+T">T. Dafni</a>, <a href="/search/physics?searchtype=author&query=Dias%2C+T+H+V+T">T. H. V. T. Dias</a>, <a href="/search/physics?searchtype=author&query=Diaz%2C+J">J. Diaz</a>, <a href="/search/physics?searchtype=author&query=Egorov%2C+M">M. Egorov</a>, <a href="/search/physics?searchtype=author&query=Esteve%2C+R">R. Esteve</a>, <a href="/search/physics?searchtype=author&query=Evtoukhovitch%2C+P">P. Evtoukhovitch</a>, <a href="/search/physics?searchtype=author&query=Fernandes%2C+L+M+P">L. M. P. Fernandes</a>, <a href="/search/physics?searchtype=author&query=Ferrario%2C+P">P. Ferrario</a>, <a href="/search/physics?searchtype=author&query=Ferreira%2C+A+L">A. L. Ferreira</a>, <a href="/search/physics?searchtype=author&query=Freitas%2C+E+D+C">E. D. C. Freitas</a>, <a href="/search/physics?searchtype=author&query=Gehman%2C+V+M">V. M. Gehman</a>, <a href="/search/physics?searchtype=author&query=Gil%2C+A">A. Gil</a>, <a href="/search/physics?searchtype=author&query=Goldschmidt%2C+A">A. Goldschmidt</a>, <a href="/search/physics?searchtype=author&query=Gomez%2C+H">H. Gomez</a>, <a href="/search/physics?searchtype=author&query=Gomez-Cadenas%2C+J+J">J. J. Gomez-Cadenas</a>, <a href="/search/physics?searchtype=author&query=Gonzalez-Diaz%2C+D">D. Gonzalez-Diaz</a>, <a href="/search/physics?searchtype=author&query=Gutierrez%2C+R+M">R. M. Gutierrez</a> , et al. (65 additional authors not shown) </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="1311.3535v2-abstract-short" style="display: inline;"> NEXT-MM is a general-purpose high pressure (10 bar, $\sim25$ l active volume) Xenon-based TPC, read out in charge mode with an 8 cm $\times$8 cm-segmented 700 cm$^2$ plane (1152 ch) of the latest microbulk-Micromegas technology. It has been recently commissioned at University of Zaragoza as part of the R&D of the NEXT $0谓尾尾$ experiment, although the experiment's first stage is currently being buil… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1311.3535v2-abstract-full').style.display = 'inline'; document.getElementById('1311.3535v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1311.3535v2-abstract-full" style="display: none;"> NEXT-MM is a general-purpose high pressure (10 bar, $\sim25$ l active volume) Xenon-based TPC, read out in charge mode with an 8 cm $\times$8 cm-segmented 700 cm$^2$ plane (1152 ch) of the latest microbulk-Micromegas technology. It has been recently commissioned at University of Zaragoza as part of the R&D of the NEXT $0谓尾尾$ experiment, although the experiment's first stage is currently being built based on a SiPM/PMT-readout concept relying on electroluminescence. Around 2 million events were collected during the last months, stemming from the low energy $纬$-rays emitted by a $^{241}$Am source when interacting with the Xenon gas ($蔚$ = 26, 30, 59.5 keV). The localized nature of such events above atmospheric pressure, the long drift times, as well as the possibility to determine their production time from the associated $伪$ particle in coincidence, allow the extraction of primordial properties of the TPC filling gas, namely the drift velocity, diffusion and attachment coefficients. In this work we focus on the little explored combination of Xe and trimethylamine (TMA) for which, in particular, such properties are largely unknown. This gas mixture offers potential advantages over pure Xenon when aimed at Rare Event Searches, mainly due to its Penning characteristics, wave-length shifting properties and reduced diffusion, and it is being actively investigated by our collaboration. The chamber is currently operated at 2.7 bar, as an intermediate step towards the envisaged 10 bar. We report here its performance as well as a first implementation of the calibration procedures that have allowed the extension of the previously reported energy resolution to the whole readout plane (10.6%FWHM@30keV). <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1311.3535v2-abstract-full').style.display = 'none'; document.getElementById('1311.3535v2-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 17 November, 2013; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 14 November, 2013; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> November 2013. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">22 pages, 13 figures</span> </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1311.3242">arXiv:1311.3242</a> <span> [<a href="https://arxiv.org/pdf/1311.3242">pdf</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Instrumentation and Detectors">physics.ins-det</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1088/1748-0221/9/03/P03010">10.1088/1748-0221/9/03/P03010 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Description and commissioning of NEXT-MM prototype: first results from operation in a Xenon-Trimethylamine gas mixture </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=NEXT+Collaboration"> NEXT Collaboration</a>, <a href="/search/physics?searchtype=author&query=%C3%81lvarez%2C+V">V. 脕lvarez</a>, <a href="/search/physics?searchtype=author&query=Aznar%2C+F">F. Aznar</a>, <a href="/search/physics?searchtype=author&query=Borges%2C+F+I+G+M">F. I. G. M. Borges</a>, <a href="/search/physics?searchtype=author&query=Calvet%2C+D">D. Calvet</a>, <a href="/search/physics?searchtype=author&query=C%C3%A1rcel%2C+S">S. C谩rcel</a>, <a href="/search/physics?searchtype=author&query=Castel%2C+J">J. Castel</a>, <a href="/search/physics?searchtype=author&query=Cebri%C3%A1n%2C+S">S. Cebri谩n</a>, <a href="/search/physics?searchtype=author&query=Cervera%2C+A">A. Cervera</a>, <a href="/search/physics?searchtype=author&query=Conde%2C+C+A+N">C. A. N. Conde</a>, <a href="/search/physics?searchtype=author&query=Dafni%2C+T">T. Dafni</a>, <a href="/search/physics?searchtype=author&query=Dias%2C+T+H+V+T">T. H. V. T. Dias</a>, <a href="/search/physics?searchtype=author&query=D%C3%ADaz%2C+J">J. D铆az</a>, <a href="/search/physics?searchtype=author&query=Druillole%2C+F">F. Druillole</a>, <a href="/search/physics?searchtype=author&query=Egorov%2C+M">M. Egorov</a>, <a href="/search/physics?searchtype=author&query=Esteve%2C+R">R. Esteve</a>, <a href="/search/physics?searchtype=author&query=Evtoukhovitch%2C+P">P. Evtoukhovitch</a>, <a href="/search/physics?searchtype=author&query=Fernandes%2C+L+M+P">L. M. P. Fernandes</a>, <a href="/search/physics?searchtype=author&query=Ferrario%2C+P">P. Ferrario</a>, <a href="/search/physics?searchtype=author&query=Ferreira%2C+A+L">A. L. Ferreira</a>, <a href="/search/physics?searchtype=author&query=Ferrer-Ribas%2C+E">E. Ferrer-Ribas</a>, <a href="/search/physics?searchtype=author&query=Freitas%2C+E+D+C">E. D. C. Freitas</a>, <a href="/search/physics?searchtype=author&query=Gehman%2C+V+M">V. M. Gehman</a>, <a href="/search/physics?searchtype=author&query=Gil%2C+A">A. Gil</a>, <a href="/search/physics?searchtype=author&query=Giomataris%2C+I">I. Giomataris</a> , et al. (60 additional authors not shown) </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="1311.3242v2-abstract-short" style="display: inline;"> A technical description of NEXT-MM and its commissioning and first performance is reported. Having an active volume of ~35 cm drift $\times$ 28 cm diameter, it constitutes the largest Micromegas-read TPC operated in Xenon ever constructed, made by a sectorial arrangement of the 4 largest single wafers manufactured with the Microbulk technique to date. It is equipped with a suitably pixelized reado… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1311.3242v2-abstract-full').style.display = 'inline'; document.getElementById('1311.3242v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1311.3242v2-abstract-full" style="display: none;"> A technical description of NEXT-MM and its commissioning and first performance is reported. Having an active volume of ~35 cm drift $\times$ 28 cm diameter, it constitutes the largest Micromegas-read TPC operated in Xenon ever constructed, made by a sectorial arrangement of the 4 largest single wafers manufactured with the Microbulk technique to date. It is equipped with a suitably pixelized readout and with a sufficiently large sensitive volume (~23 l) so as to contain long (~20 cm) electron tracks. First results obtained at 1 bar for Xenon and trimethylamine (Xe-(2 %)TMA) mixture are presented. The TPC can accurately reconstruct extended background tracks. An encouraging full-width half-maximum of 11.6 % was obtained for ~29 keV gammas without resorting to any data post-processing. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1311.3242v2-abstract-full').style.display = 'none'; document.getElementById('1311.3242v2-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 27 November, 2013; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 13 November, 2013; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> November 2013. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">22 pages, 9 figures</span> </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1310.3391">arXiv:1310.3391</a> <span> [<a href="https://arxiv.org/pdf/1310.3391">pdf</a>, <a href="https://arxiv.org/format/1310.3391">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Instrumentation and Detectors">physics.ins-det</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="High Energy Physics - Experiment">hep-ex</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1088/1748-0221/9/01/P0100101001">10.1088/1748-0221/9/01/P0100101001 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Low background x-ray detection with Micromegas for axion research </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Aune%2C+S">S. Aune</a>, <a href="/search/physics?searchtype=author&query=Castel%2C+J+F">J. F. Castel</a>, <a href="/search/physics?searchtype=author&query=Dafni%2C+T">T. Dafni</a>, <a href="/search/physics?searchtype=author&query=Davenport%2C+M">M. Davenport</a>, <a href="/search/physics?searchtype=author&query=Fanourakis%2C+G">G. Fanourakis</a>, <a href="/search/physics?searchtype=author&query=Ferrer-Ribas%2C+E">E. Ferrer-Ribas</a>, <a href="/search/physics?searchtype=author&query=Galan%2C+J">J. Galan</a>, <a href="/search/physics?searchtype=author&query=Garcia%2C+J+A">J. A. Garcia</a>, <a href="/search/physics?searchtype=author&query=Gardikiotis%2C+A">A. Gardikiotis</a>, <a href="/search/physics?searchtype=author&query=Geralis%2C+T">T. Geralis</a>, <a href="/search/physics?searchtype=author&query=Giomataris%2C+I">I. Giomataris</a>, <a href="/search/physics?searchtype=author&query=Gomez%2C+H">H. Gomez</a>, <a href="/search/physics?searchtype=author&query=Garza%2C+J+G">J. G. Garza</a>, <a href="/search/physics?searchtype=author&query=Herrera%2C+D+C">D. C. Herrera</a>, <a href="/search/physics?searchtype=author&query=Iguaz%2C+F+J">F. J. Iguaz</a>, <a href="/search/physics?searchtype=author&query=Irastorza%2C+I+G">I. G. Irastorza</a>, <a href="/search/physics?searchtype=author&query=Jourde%2C+D">D. Jourde</a>, <a href="/search/physics?searchtype=author&query=Luzon%2C+G">G. Luzon</a>, <a href="/search/physics?searchtype=author&query=Mols%2C+J+P">J. P. Mols</a>, <a href="/search/physics?searchtype=author&query=Papaevangelou%2C+T">T. Papaevangelou</a>, <a href="/search/physics?searchtype=author&query=Rodriguez%2C+A">A. Rodriguez</a>, <a href="/search/physics?searchtype=author&query=Ruz%2C+J">J. Ruz</a>, <a href="/search/physics?searchtype=author&query=Segui%2C+L">L. Segui</a>, <a href="/search/physics?searchtype=author&query=Tomas%2C+A">A. Tomas</a>, <a href="/search/physics?searchtype=author&query=Vafeiadis%2C+T">T. Vafeiadis</a> , et al. (1 additional authors not shown) </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="1310.3391v1-abstract-short" style="display: inline;"> Axion helioscopes aim at the detection of solar axions through their conversion into x-rays in laboratory magnetic fields. The use of low background x-ray detectors is an essential component contributing to the sensitivity of these searches. Here we review the recent advances on Micromegas detectors used in the CERN Axion Solar Telescope (CAST) and proposed for the future International Axion Obser… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1310.3391v1-abstract-full').style.display = 'inline'; document.getElementById('1310.3391v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1310.3391v1-abstract-full" style="display: none;"> Axion helioscopes aim at the detection of solar axions through their conversion into x-rays in laboratory magnetic fields. The use of low background x-ray detectors is an essential component contributing to the sensitivity of these searches. Here we review the recent advances on Micromegas detectors used in the CERN Axion Solar Telescope (CAST) and proposed for the future International Axion Observatory (IAXO). The most recent Micromegas setups in CAST have achieved background levels of 1.5$\times10^{-6}$\ckcs, a factor of more than 100 lower than the ones obtained by the first generation of CAST detectors. This improvement is due to the development of active and passive shielding techniques, offline discrimination techniques allowed by highly granular readout patterns, as well as the use of radiopure detector components. The status of the intensive R&D to reduce the background levels will be described, including the operation of replica detectors in test benches and the detailed Geant4 simulation of the detector setup and the detector response, which has allowed the progressive understanding of background origins. The best levels currently achieved in a test setup operating in the Canfranc Underground Laboratory (LSC) are as low as $\sim10^{-7}$\ckcs, showing the good prospects of this technology for application in the future IAXO. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1310.3391v1-abstract-full').style.display = 'none'; document.getElementById('1310.3391v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 12 October, 2013; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> October 2013. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">26 pages, 21 figures</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> S Aune et al 2014 JINST 9 P010011 </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1310.1242">arXiv:1310.1242</a> <span> [<a href="https://arxiv.org/pdf/1310.1242">pdf</a>, <a href="https://arxiv.org/format/1310.1242">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Instrumentation and Detectors">physics.ins-det</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1088/1748-0221/8/11/C11007">10.1088/1748-0221/8/11/C11007 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Piggyback resistive Micromegas </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Atti%C3%A9%2C+D">D. Atti茅</a>, <a href="/search/physics?searchtype=author&query=Chaus%2C+A">A. Chaus</a>, <a href="/search/physics?searchtype=author&query=Durand%2C+D">D. Durand</a>, <a href="/search/physics?searchtype=author&query=Ferrer-Ribas%2C+D+D+E">D. Deforges E. Ferrer-Ribas</a>, <a href="/search/physics?searchtype=author&query=Gal%C3%A1n%2C+J">J. Gal谩n</a>, <a href="/search/physics?searchtype=author&query=Giomataris%2C+Y">Y. Giomataris</a>, <a href="/search/physics?searchtype=author&query=Gongadze%2C+A">A. Gongadze</a>, <a href="/search/physics?searchtype=author&query=Iguaz%2C+F+J">F. J. Iguaz</a>, <a href="/search/physics?searchtype=author&query=Jeanneau%2C+F">F. Jeanneau</a>, <a href="/search/physics?searchtype=author&query=de+Oliveira%2C+R">R. de Oliveira</a>, <a href="/search/physics?searchtype=author&query=Papaevangelou%2C+T">T. Papaevangelou</a>, <a href="/search/physics?searchtype=author&query=Peyaud%2C+A">A. Peyaud</a>, <a href="/search/physics?searchtype=author&query=Teixeira%2C+A">A. Teixeira</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="1310.1242v1-abstract-short" style="display: inline;"> Piggyback Micromegas consists in a novel readout architecture where the anode element is made of a resistive layer on a ceramic substrate. The resistive layer is deposited on the thin ceramic substrate by an industrial process which provides large dynamic range of resistivity (10$^6$ to 10$^{10}$\,M$惟$/square). The particularity of this new structure is that the active part is entirely dissociated… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1310.1242v1-abstract-full').style.display = 'inline'; document.getElementById('1310.1242v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1310.1242v1-abstract-full" style="display: none;"> Piggyback Micromegas consists in a novel readout architecture where the anode element is made of a resistive layer on a ceramic substrate. The resistive layer is deposited on the thin ceramic substrate by an industrial process which provides large dynamic range of resistivity (10$^6$ to 10$^{10}$\,M$惟$/square). The particularity of this new structure is that the active part is entirely dissociated from the read-out element. This gives a large flexibility on the design of the anode structure and the readout scheme. Without significant loss, signals are transmitted by capacitive coupling to the read-out pads. The detector provides high gas gain, good energy resolution and the resistive layer assures spark protection for the electronics. This assembly could be combined with modern pixel array electronic ASICs. First tests with different Piggyback detectors and configurations will be presented. This structure is adequate for cost effective fabrication and low outgassing detectors. It was designed to perform in sealed mode and its long term stability has been extensively studied. In addition perspectives on the future developments will be evoked. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1310.1242v1-abstract-full').style.display = 'none'; document.getElementById('1310.1242v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 4 October, 2013; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> October 2013. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">7 pages, prepared for the MPGD 2013 conference</span> </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1307.1985">arXiv:1307.1985</a> <span> [<a href="https://arxiv.org/pdf/1307.1985">pdf</a>, <a href="https://arxiv.org/ps/1307.1985">ps</a>, <a href="https://arxiv.org/format/1307.1985">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="High Energy Physics - Experiment">hep-ex</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Instrumentation and Methods for Astrophysics">astro-ph.IM</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Instrumentation and Detectors">physics.ins-det</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1103/PhysRevLett.112.091302">10.1103/PhysRevLett.112.091302 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> CAST solar axion search with 3^He buffer gas: Closing the hot dark matter gap </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Arik%2C+M">M. Arik</a>, <a href="/search/physics?searchtype=author&query=Aune%2C+S">S. Aune</a>, <a href="/search/physics?searchtype=author&query=Barth%2C+K">K. Barth</a>, <a href="/search/physics?searchtype=author&query=Belov%2C+A">A. Belov</a>, <a href="/search/physics?searchtype=author&query=Borghi%2C+S">S. Borghi</a>, <a href="/search/physics?searchtype=author&query=Brauninger%2C+H">H. Brauninger</a>, <a href="/search/physics?searchtype=author&query=Cantatore%2C+G">G. Cantatore</a>, <a href="/search/physics?searchtype=author&query=Carmona%2C+J+M">J. M. Carmona</a>, <a href="/search/physics?searchtype=author&query=Cetin%2C+S+A">S. A. Cetin</a>, <a href="/search/physics?searchtype=author&query=Collar%2C+J+I">J. I. Collar</a>, <a href="/search/physics?searchtype=author&query=Da+Riva%2C+E">E. Da Riva</a>, <a href="/search/physics?searchtype=author&query=Dafni%2C+T">T. Dafni</a>, <a href="/search/physics?searchtype=author&query=Davenport%2C+M">M. Davenport</a>, <a href="/search/physics?searchtype=author&query=Eleftheriadis%2C+C">C. Eleftheriadis</a>, <a href="/search/physics?searchtype=author&query=Elias%2C+N">N. Elias</a>, <a href="/search/physics?searchtype=author&query=Fanourakis%2C+G">G. Fanourakis</a>, <a href="/search/physics?searchtype=author&query=Ferrer-Ribas%2C+E">E. Ferrer-Ribas</a>, <a href="/search/physics?searchtype=author&query=Friedrich%2C+P">P. Friedrich</a>, <a href="/search/physics?searchtype=author&query=Galan%2C+J">J. Galan</a>, <a href="/search/physics?searchtype=author&query=Garcia%2C+J+A">J. A. Garcia</a>, <a href="/search/physics?searchtype=author&query=Gardikiotis%2C+A">A. Gardikiotis</a>, <a href="/search/physics?searchtype=author&query=Garza%2C+J+G">J. G. Garza</a>, <a href="/search/physics?searchtype=author&query=Gazis%2C+E+N">E. N. Gazis</a>, <a href="/search/physics?searchtype=author&query=Geralis%2C+T">T. Geralis</a>, <a href="/search/physics?searchtype=author&query=Georgiopoulou%2C+E">E. Georgiopoulou</a> , et al. (50 additional authors not shown) </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="1307.1985v2-abstract-short" style="display: inline;"> The CERN Axion Solar Telescope (CAST) has finished its search for solar axions with 3^He buffer gas, covering the search range 0.64 eV < m_a <1.17 eV. This closes the gap to the cosmological hot dark matter limit and actually overlaps with it. From the absence of excess X-rays when the magnet was pointing to the Sun we set a typical upper limit on the axion-photon coupling of g_ag < 3.3 x 10^{-10}… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1307.1985v2-abstract-full').style.display = 'inline'; document.getElementById('1307.1985v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1307.1985v2-abstract-full" style="display: none;"> The CERN Axion Solar Telescope (CAST) has finished its search for solar axions with 3^He buffer gas, covering the search range 0.64 eV < m_a <1.17 eV. This closes the gap to the cosmological hot dark matter limit and actually overlaps with it. From the absence of excess X-rays when the magnet was pointing to the Sun we set a typical upper limit on the axion-photon coupling of g_ag < 3.3 x 10^{-10} GeV^{-1} at 95% CL, with the exact value depending on the pressure setting. Future direct solar axion searches will focus on increasing the sensitivity to smaller values of g_a, for example by the currently discussed next generation helioscope IAXO. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1307.1985v2-abstract-full').style.display = 'none'; document.getElementById('1307.1985v2-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 15 September, 2014; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 8 July, 2013; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> July 2013. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">5 pages, 2 figures. Last version uploaded</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Phys. Rev. Lett. 112, 091302 (2014) </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1304.2057">arXiv:1304.2057</a> <span> [<a href="https://arxiv.org/pdf/1304.2057">pdf</a>, <a href="https://arxiv.org/format/1304.2057">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Instrumentation and Detectors">physics.ins-det</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Computational Physics">physics.comp-ph</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1016/j.nima.2013.08.011">10.1016/j.nima.2013.08.011 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Characterization and simulation of resistive-MPGDs with resistive strip and layer topologies </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Galan%2C+J">J. Galan</a>, <a href="/search/physics?searchtype=author&query=Attie%2C+D">D. Attie</a>, <a href="/search/physics?searchtype=author&query=Chaus%2C+A">A. Chaus</a>, <a href="/search/physics?searchtype=author&query=Colas%2C+P">P. Colas</a>, <a href="/search/physics?searchtype=author&query=Delbart%2C+A">A. Delbart</a>, <a href="/search/physics?searchtype=author&query=Ferrer-Ribas%2C+E">E. Ferrer-Ribas</a>, <a href="/search/physics?searchtype=author&query=Giomataris%2C+I">I. Giomataris</a>, <a href="/search/physics?searchtype=author&query=Iguaz%2C+F+J">F. J. Iguaz</a>, <a href="/search/physics?searchtype=author&query=Gongadze%2C+A">A. Gongadze</a>, <a href="/search/physics?searchtype=author&query=Papaevangelou%2C+T">T. Papaevangelou</a>, <a href="/search/physics?searchtype=author&query=Peyaud%2C+A">A. Peyaud</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="1304.2057v1-abstract-short" style="display: inline;"> The use of resistive technologies to MPGD detectors is taking advantage for many new applications, including high rate and energetic particle flux scenarios. The recent use of these technologies in large area detectors makes necessary to understand and characterize the response of this type of detectors in order to optimize or constrain the parameters used in its production, material resistivity,… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1304.2057v1-abstract-full').style.display = 'inline'; document.getElementById('1304.2057v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1304.2057v1-abstract-full" style="display: none;"> The use of resistive technologies to MPGD detectors is taking advantage for many new applications, including high rate and energetic particle flux scenarios. The recent use of these technologies in large area detectors makes necessary to understand and characterize the response of this type of detectors in order to optimize or constrain the parameters used in its production, material resistivity, strip width, or layer thickness. The values to be chosen will depend on the environmental conditions in which the detector will be placed, and the requirements in time resolution and gain, improving the detector performance for each given application. We present two different methods to calculate the propagation of charge diffusion through different resistive topologies; one is based on a FEM of solving the telegraph equation in our particular strip detector scheme, the other is based on a semi-analytical approach of charge diffusion and is used to determine the charge evolution in a resistive layer. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1304.2057v1-abstract-full').style.display = 'none'; document.getElementById('1304.2057v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 7 April, 2013; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> April 2013. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">VCI2013 conference</span> </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1304.2053">arXiv:1304.2053</a> <span> [<a href="https://arxiv.org/pdf/1304.2053">pdf</a>, <a href="https://arxiv.org/format/1304.2053">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Instrumentation and Detectors">physics.ins-det</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="High Energy Physics - Experiment">hep-ex</span> </div> </div> <p class="title is-5 mathjax"> Ageing studies of resistive Micromegas detectors for the HL-LHC </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Galan%2C+J">J. Galan</a>, <a href="/search/physics?searchtype=author&query=Attie%2C+D">D. Attie</a>, <a href="/search/physics?searchtype=author&query=Ferrer-Ribas%2C+E">E. Ferrer-Ribas</a>, <a href="/search/physics?searchtype=author&query=Giganon%2C+A">A. Giganon</a>, <a href="/search/physics?searchtype=author&query=Giomataris%2C+I">I. Giomataris</a>, <a href="/search/physics?searchtype=author&query=Herlant%2C+S">S. Herlant</a>, <a href="/search/physics?searchtype=author&query=Jeanneau%2C+F">F. Jeanneau</a>, <a href="/search/physics?searchtype=author&query=Peyaud%2C+A">A. Peyaud</a>, <a href="/search/physics?searchtype=author&query=Schune%2C+P">Ph. Schune</a>, <a href="/search/physics?searchtype=author&query=Alexopoulos%2C+T">T. Alexopoulos</a>, <a href="/search/physics?searchtype=author&query=Byszewski%2C+M">M. Byszewski</a>, <a href="/search/physics?searchtype=author&query=Iakovidis%2C+G">G. Iakovidis</a>, <a href="/search/physics?searchtype=author&query=Iengo%2C+P">P. Iengo</a>, <a href="/search/physics?searchtype=author&query=Ntekas%2C+K">K. Ntekas</a>, <a href="/search/physics?searchtype=author&query=Leontsinis%2C+S">S. Leontsinis</a>, <a href="/search/physics?searchtype=author&query=de+Oliveira%2C+R">R. de Oliveira</a>, <a href="/search/physics?searchtype=author&query=Tsipolitis%2C+Y">Y. Tsipolitis</a>, <a href="/search/physics?searchtype=author&query=Wotschack%2C+J">J. Wotschack</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="1304.2053v1-abstract-short" style="display: inline;"> Resistive-anode Micromegas detectors are in development since several years, in an effort to solve the problem of sparks when working in high flux and high radiations environment like in the HL-LHC (ten times the luminosity of the LHC). They have been chosen as one of the technologies that will be part of the ATLAS New Small Wheel project (forward muon system). An ageing study is mandatory to asse… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1304.2053v1-abstract-full').style.display = 'inline'; document.getElementById('1304.2053v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1304.2053v1-abstract-full" style="display: none;"> Resistive-anode Micromegas detectors are in development since several years, in an effort to solve the problem of sparks when working in high flux and high radiations environment like in the HL-LHC (ten times the luminosity of the LHC). They have been chosen as one of the technologies that will be part of the ATLAS New Small Wheel project (forward muon system). An ageing study is mandatory to assess their capabilities to handle the HL-LHC environment on a long-term period. A prototype has been exposed to several types of irradiations (X-rays, cold neutrons, 60 Co gammas) up to an equivalent HL-LHC time of more than five years without showing any degradation of the performances in terms of gain and energy resolution. Beam test studies took place in October 2012 to assess the tracking performances (efficiency, spatial resolution,...). Results of ageing studies and beam test performances are reported in this paper. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1304.2053v1-abstract-full').style.display = 'none'; document.getElementById('1304.2053v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 7 April, 2013; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> April 2013. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">proceedings VCI2013 conference</span> </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1303.5790">arXiv:1303.5790</a> <span> [<a href="https://arxiv.org/pdf/1303.5790">pdf</a>, <a href="https://arxiv.org/format/1303.5790">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Instrumentation and Detectors">physics.ins-det</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1088/1742-6596/460/1/012012">10.1088/1742-6596/460/1/012012 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Micromegas-TPC operation at high pressure in Xenon-trimethylamine mixtures </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Herrera%2C+D+C">D. C. Herrera</a>, <a href="/search/physics?searchtype=author&query=Cebri%C3%A1n%2C+S">S. Cebri谩n</a>, <a href="/search/physics?searchtype=author&query=Dafni%2C+T">T. Dafni</a>, <a href="/search/physics?searchtype=author&query=Ferrer-Ribas%2C+E">E. Ferrer-Ribas</a>, <a href="/search/physics?searchtype=author&query=Giomataris%2C+I">I. Giomataris</a>, <a href="/search/physics?searchtype=author&query=Gonzalez-Diaz%2C+D">D. Gonzalez-Diaz</a>, <a href="/search/physics?searchtype=author&query=G%C3%B3mez%2C+H">H. G贸mez</a>, <a href="/search/physics?searchtype=author&query=Iguaz%2C+F+J">F. J. Iguaz</a>, <a href="/search/physics?searchtype=author&query=Irastorza%2C+I+G">I. G. Irastorza</a>, <a href="/search/physics?searchtype=author&query=Luzon%2C+G">G. Luzon</a>, <a href="/search/physics?searchtype=author&query=Rodr%C3%ADguez%2C+A">A. Rodr铆guez</a>, <a href="/search/physics?searchtype=author&query=Segui%2C+L">L. Segui</a>, <a href="/search/physics?searchtype=author&query=Tom%C3%A1s%2C+A">A. Tom谩s</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="1303.5790v1-abstract-short" style="display: inline;"> We present in this work measurements performed with a small Micromegas-TPC using a xenon-trimethylamine (Xe-TMA) Penning-mixture as filling gas. Measurements of gas gain and energy resolutions for 22.1 keV X-rays are presented, spanning several TMA concentrations and pressures between 1 and 10 bar. Across this pressure range, the best energy resolution and largest increase in gain at constant fiel… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1303.5790v1-abstract-full').style.display = 'inline'; document.getElementById('1303.5790v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1303.5790v1-abstract-full" style="display: none;"> We present in this work measurements performed with a small Micromegas-TPC using a xenon-trimethylamine (Xe-TMA) Penning-mixture as filling gas. Measurements of gas gain and energy resolutions for 22.1 keV X-rays are presented, spanning several TMA concentrations and pressures between 1 and 10 bar. Across this pressure range, the best energy resolution and largest increase in gain at constant field (a standard figure for characterizing Penning-like energy transfers) is observed to be in the 1.5%-2.5% TMA region. A gain increase (at constant field) up to a factor 100 and a best energy resolution improved by up to a factor 3 with respect to the one previously reported in pure Xe -operated Micromegas, can be obtained. In virtue of the VUV-quenching properties of the mixture, the overall maximum gain achievable is also notably increased (up to 400 at 10bar), a factor x 3 higher than in pure Xe. In addition, preliminary measurements of the electron drift velocity in a modified setup have been performed and show good agreement with the one obtained from Magboltz. These results are of great interest for calorimetric applications in gas Xe TPCs, in particular for the search of the neutrino-less double beta decay of Xe-136. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1303.5790v1-abstract-full').style.display = 'none'; document.getElementById('1303.5790v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 22 March, 2013; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> March 2013. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">8 pages, 7 figures, proceeding</span> </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1302.3273">arXiv:1302.3273</a> <span> [<a href="https://arxiv.org/pdf/1302.3273">pdf</a>, <a href="https://arxiv.org/ps/1302.3273">ps</a>, <a href="https://arxiv.org/format/1302.3273">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Instrumentation and Detectors">physics.ins-det</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="High Energy Physics - Experiment">hep-ex</span> </div> </div> <p class="title is-5 mathjax"> IAXO - The International Axion Observatory </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Vogel%2C+J+K">J. K. Vogel</a>, <a href="/search/physics?searchtype=author&query=Avignone%2C+F+T">F. T. Avignone</a>, <a href="/search/physics?searchtype=author&query=Cantatore%2C+G">G. Cantatore</a>, <a href="/search/physics?searchtype=author&query=Carmona%2C+J+M">J. M. Carmona</a>, <a href="/search/physics?searchtype=author&query=Caspi%2C+S">S. Caspi</a>, <a href="/search/physics?searchtype=author&query=Cetin%2C+S+A">S. A. Cetin</a>, <a href="/search/physics?searchtype=author&query=Christensen%2C+F+E">F. E. Christensen</a>, <a href="/search/physics?searchtype=author&query=Dael%2C+A">A. Dael</a>, <a href="/search/physics?searchtype=author&query=Dafni%2C+T">T. Dafni</a>, <a href="/search/physics?searchtype=author&query=Davenport%2C+M">M. Davenport</a>, <a href="/search/physics?searchtype=author&query=Derbin%2C+A+V">A. V. Derbin</a>, <a href="/search/physics?searchtype=author&query=Desch%2C+K">K. Desch</a>, <a href="/search/physics?searchtype=author&query=Diago%2C+A">A. Diago</a>, <a href="/search/physics?searchtype=author&query=Dudarev%2C+A">A. Dudarev</a>, <a href="/search/physics?searchtype=author&query=Eleftheriadis%2C+C">C. Eleftheriadis</a>, <a href="/search/physics?searchtype=author&query=Fanourakis%2C+G">G. Fanourakis</a>, <a href="/search/physics?searchtype=author&query=Ferrer-Ribas%2C+E">E. Ferrer-Ribas</a>, <a href="/search/physics?searchtype=author&query=Galan%2C+J">J. Galan</a>, <a href="/search/physics?searchtype=author&query=Garcia%2C+J+A">J. A. Garcia</a>, <a href="/search/physics?searchtype=author&query=Garza%2C+J+G">J. G. Garza</a>, <a href="/search/physics?searchtype=author&query=Geralis%2C+T">T. Geralis</a>, <a href="/search/physics?searchtype=author&query=Gimeno%2C+B">B. Gimeno</a>, <a href="/search/physics?searchtype=author&query=Giomataris%2C+I">I. Giomataris</a>, <a href="/search/physics?searchtype=author&query=Gninenko%2C+S">S. Gninenko</a>, <a href="/search/physics?searchtype=author&query=Gomez%2C+H">H. Gomez</a> , et al. (39 additional authors not shown) </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="1302.3273v1-abstract-short" style="display: inline;"> The International Axion Observatory (IAXO) is a next generation axion helioscope aiming at a sensitivity to the axion-photon coupling of a few 10^{-12} GeV^{-1}, i.e. 1-1.5 orders of magnitude beyond sensitivities achieved by the currently most sensitive axion helioscope, the CERN Axion Solar Telescope (CAST). Crucial factors in improving the sensitivity for IAXO are the increase of the magnetic f… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1302.3273v1-abstract-full').style.display = 'inline'; document.getElementById('1302.3273v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1302.3273v1-abstract-full" style="display: none;"> The International Axion Observatory (IAXO) is a next generation axion helioscope aiming at a sensitivity to the axion-photon coupling of a few 10^{-12} GeV^{-1}, i.e. 1-1.5 orders of magnitude beyond sensitivities achieved by the currently most sensitive axion helioscope, the CERN Axion Solar Telescope (CAST). Crucial factors in improving the sensitivity for IAXO are the increase of the magnetic field volume together with the extensive use of x-ray focusing optics and low background detectors, innovations already successfully tested at CAST. Electron-coupled axions invoked to explain the white dwarf cooling, relic axions, and a large variety of more generic axion-like particles (ALPs) along with other novel excitations at the low-energy frontier of elementary particle physics could provide additional physics motivation for IAXO. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1302.3273v1-abstract-full').style.display = 'none'; document.getElementById('1302.3273v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 13 February, 2013; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> February 2013. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">6 pages, 1 figure, Contribution to the 8th Patras Workshop on Axions, WIMPs and WISPs, Chicago, IL, USA, 2012</span> </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1301.7648">arXiv:1301.7648</a> <span> [<a href="https://arxiv.org/pdf/1301.7648">pdf</a>, <a href="https://arxiv.org/format/1301.7648">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Instrumentation and Detectors">physics.ins-det</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="High Energy Physics - Experiment">hep-ex</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Accelerator Physics">physics.acc-ph</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1088/1748-0221/8/04/P04028">10.1088/1748-0221/8/04/P04028 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> An ageing study of resistive micromegas for the HL-LHC environment </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Gal%C3%A1n%2C+J">J. Gal谩n</a>, <a href="/search/physics?searchtype=author&query=Atti%C3%A9%2C+D">D. Atti茅</a>, <a href="/search/physics?searchtype=author&query=Ferrer-Ribas%2C+E">E. Ferrer-Ribas</a>, <a href="/search/physics?searchtype=author&query=Giganon%2C+A">A. Giganon</a>, <a href="/search/physics?searchtype=author&query=Giomataris%2C+I">I. Giomataris</a>, <a href="/search/physics?searchtype=author&query=Herlant%2C+S">S. Herlant</a>, <a href="/search/physics?searchtype=author&query=Jeanneau%2C+F">F. Jeanneau</a>, <a href="/search/physics?searchtype=author&query=Peyaud%2C+A">A. Peyaud</a>, <a href="/search/physics?searchtype=author&query=Schune%2C+P">Ph. Schune</a>, <a href="/search/physics?searchtype=author&query=Alexopoulos%2C+T">T. Alexopoulos</a>, <a href="/search/physics?searchtype=author&query=Byszewski%2C+M">M. Byszewski</a>, <a href="/search/physics?searchtype=author&query=Iakovidis%2C+G">G. Iakovidis</a>, <a href="/search/physics?searchtype=author&query=Iengo%2C+P">P. Iengo</a>, <a href="/search/physics?searchtype=author&query=Ntekas%2C+K">K. Ntekas</a>, <a href="/search/physics?searchtype=author&query=Leontsinis%2C+S">S. Leontsinis</a>, <a href="/search/physics?searchtype=author&query=de+Oliveira%2C+R">R. de Oliveira</a>, <a href="/search/physics?searchtype=author&query=Tsipolitis%2C+Y">Y. Tsipolitis</a>, <a href="/search/physics?searchtype=author&query=Wotschack%2C+J">J. Wotschack</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="1301.7648v1-abstract-short" style="display: inline;"> Resistive-anode micromegas detectors are in development since several years, in an effort to solve the problem of sparks when working at high flux and high ionizing radiation like in the HL-LHC (up to ten times the luminosity of the LHC). They have been chosen as one of the technologies that will be part of the ATLAS New Small Wheel project (forward muon system). An ageing study is mandatory to as… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1301.7648v1-abstract-full').style.display = 'inline'; document.getElementById('1301.7648v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1301.7648v1-abstract-full" style="display: none;"> Resistive-anode micromegas detectors are in development since several years, in an effort to solve the problem of sparks when working at high flux and high ionizing radiation like in the HL-LHC (up to ten times the luminosity of the LHC). They have been chosen as one of the technologies that will be part of the ATLAS New Small Wheel project (forward muon system). An ageing study is mandatory to assess their capabilities to handle the HL-LHC environment on a long-term period. A prototype has been exposed to several types of irradiation (X-rays, cold neutrons, $^{60}$Co gammas and alphas) above the equivalent charge produced at the detector in five HL-LHC running years without showing any degradation of the performances in terms of gain and energy resolution. This study has been completed with the characterization of the tracking performances in terms of efficiency and spatial resolution, verifying the compatibility of results obtained with both resistive micromegas detectors, irradiated and non-irradiated one. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1301.7648v1-abstract-full').style.display = 'none'; document.getElementById('1301.7648v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 31 January, 2013; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> January 2013. </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1210.3287">arXiv:1210.3287</a> <span> [<a href="https://arxiv.org/pdf/1210.3287">pdf</a>, <a href="https://arxiv.org/format/1210.3287">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Instrumentation and Detectors">physics.ins-det</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Instrumentation and Methods for Astrophysics">astro-ph.IM</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="High Energy Physics - Experiment">hep-ex</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1088/1748-0221/8/01/P01012">10.1088/1748-0221/8/01/P01012 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Micromegas-TPC operation at high pressure in xenon-trimethylamine mixtures </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Cebri%C3%A1n%2C+S">S. Cebri谩n</a>, <a href="/search/physics?searchtype=author&query=Dafni%2C+T">T. Dafni</a>, <a href="/search/physics?searchtype=author&query=Ferrer-Ribas%2C+E">E. Ferrer-Ribas</a>, <a href="/search/physics?searchtype=author&query=Giomataris%2C+I">I. Giomataris</a>, <a href="/search/physics?searchtype=author&query=Gonzalez-Diaz%2C+D">D. Gonzalez-Diaz</a>, <a href="/search/physics?searchtype=author&query=G%C3%B3mez%2C+H">H. G贸mez</a>, <a href="/search/physics?searchtype=author&query=Herrera%2C+D+C">D. C. Herrera</a>, <a href="/search/physics?searchtype=author&query=Iguaz%2C+F+J">F. J. Iguaz</a>, <a href="/search/physics?searchtype=author&query=Irastorza%2C+I+G">I. G. Irastorza</a>, <a href="/search/physics?searchtype=author&query=Luzon%2C+G">G. Luzon</a>, <a href="/search/physics?searchtype=author&query=Rodr%C3%ADguez%2C+A">A. Rodr铆guez</a>, <a href="/search/physics?searchtype=author&query=Segui%2C+L">L. Segui</a>, <a href="/search/physics?searchtype=author&query=Tom%C3%A1s%2C+A">A. Tom谩s</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="1210.3287v3-abstract-short" style="display: inline;"> In this work we present a systematic study of Micromegas detectors in high pressure gaseous Xenon using trimethylamine (TMA) as quencher gas. Gas gains and energy resolutions for 22.1 keV X-rays are measured for pressures between 1 and 10 bar and various relative concentrations of TMA from 0.3 % to 15 %. We observe stable operation at all pressures, and a strongly enhanced gas gain, suggestive of… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1210.3287v3-abstract-full').style.display = 'inline'; document.getElementById('1210.3287v3-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1210.3287v3-abstract-full" style="display: none;"> In this work we present a systematic study of Micromegas detectors in high pressure gaseous Xenon using trimethylamine (TMA) as quencher gas. Gas gains and energy resolutions for 22.1 keV X-rays are measured for pressures between 1 and 10 bar and various relative concentrations of TMA from 0.3 % to 15 %. We observe stable operation at all pressures, and a strongly enhanced gas gain, suggestive of Penning-like energy-transfer processes. The effect is present at all pressures and it is strongest at TMA concentrations ranging from 1.5 % to 3 %. Operating in this concentration range, the maximum gain reached values as high as x10^3 (x10^2) at 1 (10) bar. Besides, the energy resolution achievable for 22.1 keV X-rays is substantially better than the one previously obtained in pure Xe, going down to 7.3 % (9.6 %) FWHM for 1 (10) bar. These results are of interest for calorimetric applications of high pressure gas Xe TPCs, in particular for the search of the neutrinoless double beta decay of Xe-136. The resolutions achieved would extrapolate into 0.7 % (0.9 %) FWHM at the Qbb value of Xe-136 for 1 (10) bar. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1210.3287v3-abstract-full').style.display = 'none'; document.getElementById('1210.3287v3-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 23 November, 2012; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 11 October, 2012; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> October 2012. </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1208.5690">arXiv:1208.5690</a> <span> [<a href="https://arxiv.org/pdf/1208.5690">pdf</a>, <a href="https://arxiv.org/format/1208.5690">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Instrumentation and Detectors">physics.ins-det</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Solar and Stellar Astrophysics">astro-ph.SR</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="High Energy Physics - Experiment">hep-ex</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1016/j.phpro.2012.02.399">10.1016/j.phpro.2012.02.399 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> CAST microbulk micromegas in the Canfranc Underground Laboratory </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Tom%C3%A1s%2C+A">A. Tom谩s</a>, <a href="/search/physics?searchtype=author&query=Aune%2C+S">S. Aune</a>, <a href="/search/physics?searchtype=author&query=Dafni%2C+T">T. Dafni</a>, <a href="/search/physics?searchtype=author&query=Fanourakis%2C+G">G. Fanourakis</a>, <a href="/search/physics?searchtype=author&query=Ferrer-Ribas%2C+E">E. Ferrer-Ribas</a>, <a href="/search/physics?searchtype=author&query=Gal%C3%A1n%2C+J">J. Gal谩n</a>, <a href="/search/physics?searchtype=author&query=Garc%C3%ADa%2C+J+A">J. A. Garc铆a</a>, <a href="/search/physics?searchtype=author&query=Gardikiotis%2C+A">A. Gardikiotis</a>, <a href="/search/physics?searchtype=author&query=Geralis%2C+T">T. Geralis</a>, <a href="/search/physics?searchtype=author&query=Giomataris%2C+I">I. Giomataris</a>, <a href="/search/physics?searchtype=author&query=G%C3%B3mez%2C+H">H. G贸mez</a>, <a href="/search/physics?searchtype=author&query=Garza%2C+J+G">J. G. Garza</a>, <a href="/search/physics?searchtype=author&query=Herrera%2C+D+C">D. C. Herrera</a>, <a href="/search/physics?searchtype=author&query=Iguaz%2C+F+J">F. J. Iguaz</a>, <a href="/search/physics?searchtype=author&query=Irastorza%2C+I+G">I. G. Irastorza</a>, <a href="/search/physics?searchtype=author&query=Luz%C3%B3n%2C+G">G. Luz贸n</a>, <a href="/search/physics?searchtype=author&query=Papaevangelou%2C+T">T. Papaevangelou</a>, <a href="/search/physics?searchtype=author&query=Rodr%C3%ADguez%2C+A">A. Rodr铆guez</a>, <a href="/search/physics?searchtype=author&query=Ruz%2C+J">J. Ruz</a>, <a href="/search/physics?searchtype=author&query=Segu%C3%AD%2C+L">L. Segu铆</a>, <a href="/search/physics?searchtype=author&query=Vafeiadis%2C+T">T. Vafeiadis</a>, <a href="/search/physics?searchtype=author&query=Yildiz%2C+S+C">S. C. Yildiz</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="1208.5690v1-abstract-short" style="display: inline;"> During the last taking data campaigns of the CAST experiment, the micromegas detectors have achieved background levels of $\approx 5 \times 10^{-6}$keV$^{-1}$cm$^{-2}$s$^{-1}$ between 2 and 9 keV. This performance has been possible thanks to the introduction of the microbulk technology, the implementation of a shielding and the development of discrimination algorithms. It has motivated new studies… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1208.5690v1-abstract-full').style.display = 'inline'; document.getElementById('1208.5690v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1208.5690v1-abstract-full" style="display: none;"> During the last taking data campaigns of the CAST experiment, the micromegas detectors have achieved background levels of $\approx 5 \times 10^{-6}$keV$^{-1}$cm$^{-2}$s$^{-1}$ between 2 and 9 keV. This performance has been possible thanks to the introduction of the microbulk technology, the implementation of a shielding and the development of discrimination algorithms. It has motivated new studies towards a deeper understanding of CAST detectors background. One of the working lines includes the construction of a replica of the set-up used in CAST by micromegas detectors and its installation in the Canfranc Underground Laboratory. Thanks to the comparison between the performance of the detectors underground and at surface, shielding upgrades, etc, different contributions to the detectors background have been evaluated. In particular, an upper limit $< 2 \times 10^{-7}$keV$^{-1}$cm$^{-2}$s$^{-1}$ for the intrinsic background of the detector has been obtained. This work means a first evaluation of the potential of the newest micromegas technology in an underground laboratory, the most suitable environment for Rare Event Searches. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1208.5690v1-abstract-full').style.display = 'none'; document.getElementById('1208.5690v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 28 August, 2012; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> August 2012. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">6 pages, 8 figures. To appear in the proceedings of the 2nd International Conference on Technology and Instrumentation for Particle Physics (TIPP 2011)</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Proceedings of the 2nd International Conference on Technology and Instrumentation in Particle Physics (TIPP 2011) Volume 37, 2012, Pages 478-482 </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1206.6199">arXiv:1206.6199</a> <span> [<a href="https://arxiv.org/pdf/1206.6199">pdf</a>, <a href="https://arxiv.org/format/1206.6199">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Instrumentation and Detectors">physics.ins-det</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="High Energy Physics - Experiment">hep-ex</span> </div> </div> <p class="title is-5 mathjax"> Design and characterization of the SiPM tracking system of NEXT-DEMO, a demonstrator prototype of the NEXT-100 experiment </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=NEXT+Collaboration"> NEXT Collaboration</a>, <a href="/search/physics?searchtype=author&query=%C3%81lvarez%2C+V">V. 脕lvarez</a>, <a href="/search/physics?searchtype=author&query=Ball%2C+M">M. Ball</a>, <a href="/search/physics?searchtype=author&query=Borges%2C+F+I+G+M">F. I. G. M. Borges</a>, <a href="/search/physics?searchtype=author&query=C%C3%A1rcel%2C+S">S. C谩rcel</a>, <a href="/search/physics?searchtype=author&query=Carmona%2C+J+M">J. M. Carmona</a>, <a href="/search/physics?searchtype=author&query=Castel%2C+J">J. Castel</a>, <a href="/search/physics?searchtype=author&query=Catal%C3%A1%2C+J+M">J. M. Catal谩</a>, <a href="/search/physics?searchtype=author&query=Cebri%C3%A1n%2C+S">S. Cebri谩n</a>, <a href="/search/physics?searchtype=author&query=Cervera%2C+A">A. Cervera</a>, <a href="/search/physics?searchtype=author&query=Chan%2C+D">D. Chan</a>, <a href="/search/physics?searchtype=author&query=Conde%2C+C+A+N">C. A. N. Conde</a>, <a href="/search/physics?searchtype=author&query=Dafni%2C+T">T. Dafni</a>, <a href="/search/physics?searchtype=author&query=Dias%2C+T+H+V+T">T. H. V. T. Dias</a>, <a href="/search/physics?searchtype=author&query=D%C3%ADaz%2C+J">J. D铆az</a>, <a href="/search/physics?searchtype=author&query=Egorov%2C+M">M. Egorov</a>, <a href="/search/physics?searchtype=author&query=Esteve%2C+R">R. Esteve</a>, <a href="/search/physics?searchtype=author&query=Evtoukhovitch%2C+P">P. Evtoukhovitch</a>, <a href="/search/physics?searchtype=author&query=Fernandes%2C+L+M+P">L. M. P. Fernandes</a>, <a href="/search/physics?searchtype=author&query=Ferrario%2C+P">P. Ferrario</a>, <a href="/search/physics?searchtype=author&query=Ferreira%2C+A+L">A. L. Ferreira</a>, <a href="/search/physics?searchtype=author&query=Ferrer-Ribas%2C+E">E. Ferrer-Ribas</a>, <a href="/search/physics?searchtype=author&query=Freitas%2C+E+D+C">E. D. C. Freitas</a>, <a href="/search/physics?searchtype=author&query=Garcia%2C+A+N+C">A. N. C. Garcia</a>, <a href="/search/physics?searchtype=author&query=Gehman%2C+V+M">V. M. Gehman</a> , et al. (64 additional authors not shown) </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="1206.6199v2-abstract-short" style="display: inline;"> NEXT-100 experiment aims at searching the neutrinoless double-beta decay of the Xe-136 isotope using a TPC filled with a 100 kg of high-pressure gaseous xenon, with 90% isotopic enrichment. The experiment will take place at the Laboratorio Subterr谩neo de Canfranc (LSC), Spain. NEXT-100 uses electroluminescence (EL) technology for energy measurement with a resolution better than 1% FWHM. The gaseou… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1206.6199v2-abstract-full').style.display = 'inline'; document.getElementById('1206.6199v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1206.6199v2-abstract-full" style="display: none;"> NEXT-100 experiment aims at searching the neutrinoless double-beta decay of the Xe-136 isotope using a TPC filled with a 100 kg of high-pressure gaseous xenon, with 90% isotopic enrichment. The experiment will take place at the Laboratorio Subterr谩neo de Canfranc (LSC), Spain. NEXT-100 uses electroluminescence (EL) technology for energy measurement with a resolution better than 1% FWHM. The gaseous xenon in the TPC additionally allows the tracks of the two beta particles to be recorded, which are expected to have a length of up to 30 cm at 10 bar pressure. The ability to record the topological signature of the neutrinoless double-beta events provides a powerful background rejection factor for the double-beta experiment. In this paper, we present a novel 3D imaging concept using SiPMs coated with tetraphenyl butadiene (TPB) for the EL read out and its first implementation in NEXT-DEMO, a large-scale prototype of the NEXT-100 experiment. The design and the first characterization measurements of the NEXT-DEMO SiPM tracking system are presented. The SiPM response uniformity over the tracking plane drawn from its gain map is shown to be better than 4%. An automated active control system for the stabilization of the SiPMs gain was developed, based on the voltage supply compensation of the gain drifts. The gain is shown to be stabilized within 0.2% relative variation around its nominal value, provided by Hamamatsu, in a temperature range of 10 degree C. The noise level from the electronics and the SiPM dark noise is shown to lay typically below the level of 10 photoelectrons (pe) in the ADC. Hence, a detection threshold at 10 pe is set for the acquisition of the tracking signals. The ADC full dynamic range (4096 channels) is shown to be adequate for signal levels of up to 200 pe/microsecond, which enables recording most of the tracking signals. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1206.6199v2-abstract-full').style.display = 'none'; document.getElementById('1206.6199v2-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 22 February, 2013; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 27 June, 2012; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> June 2012. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">Submitted to JINST</span> </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1202.1074">arXiv:1202.1074</a> <span> [<a href="https://arxiv.org/pdf/1202.1074">pdf</a>, <a href="https://arxiv.org/format/1202.1074">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Instrumentation and Detectors">physics.ins-det</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="High Energy Physics - Experiment">hep-ex</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1088/1748-0221/7/03/C03040">10.1088/1748-0221/7/03/C03040 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Performances of Anode-resistive Micromegas for HL-LHC </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Manjarres%2C+J">J. Manjarres</a>, <a href="/search/physics?searchtype=author&query=Alexopoulos%2C+T">T. Alexopoulos</a>, <a href="/search/physics?searchtype=author&query=Attie%2C+D">D. Attie</a>, <a href="/search/physics?searchtype=author&query=Boyer%2C+M">M. Boyer</a>, <a href="/search/physics?searchtype=author&query=Derre%2C+J">J. Derre</a>, <a href="/search/physics?searchtype=author&query=Fanourakis%2C+G">G. Fanourakis</a>, <a href="/search/physics?searchtype=author&query=Ferrer-Ribas%2C+E">E. Ferrer-Ribas</a>, <a href="/search/physics?searchtype=author&query=Galan%2C+J">J. Galan</a>, <a href="/search/physics?searchtype=author&query=Gazis%2C+E">E. Gazis</a>, <a href="/search/physics?searchtype=author&query=Geralis%2C+T">T. Geralis</a>, <a href="/search/physics?searchtype=author&query=Giganon%2C+A">A. Giganon</a>, <a href="/search/physics?searchtype=author&query=Giomataris%2C+I">I. Giomataris</a>, <a href="/search/physics?searchtype=author&query=Herlant%2C+S">S. Herlant</a>, <a href="/search/physics?searchtype=author&query=Jeanneau%2C+F">F. Jeanneau</a>, <a href="/search/physics?searchtype=author&query=Schune%2C+P">Ph. Schune</a>, <a href="/search/physics?searchtype=author&query=Titov%2C+M">M. Titov</a>, <a href="/search/physics?searchtype=author&query=Tsipolitis%2C+G">G. Tsipolitis</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="1202.1074v1-abstract-short" style="display: inline;"> Micromegas technology is a promising candidate to replace Atlas forward muon chambers -tracking and trigger- for future HL-LHC upgrade of the experiment. The increase on background and pile-up event probability requires detector performances which are currently under studies in intensive RD activities. We studied performances of four different resistive Micromegas detectors with different read-o… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1202.1074v1-abstract-full').style.display = 'inline'; document.getElementById('1202.1074v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1202.1074v1-abstract-full" style="display: none;"> Micromegas technology is a promising candidate to replace Atlas forward muon chambers -tracking and trigger- for future HL-LHC upgrade of the experiment. The increase on background and pile-up event probability requires detector performances which are currently under studies in intensive RD activities. We studied performances of four different resistive Micromegas detectors with different read-out strip pitches. These chambers were tested using \sim120 GeV momentum pions, at H6 CERN-SPS beam line in autumn 2010. For a strip pitch 500 micrometers we measure a resolution of \sim90 micrometers and a efficiency of ~98%. The track angle effect on the efficiency was also studied. Our results show that resistive techniques induce no degradation on the efficiency or resolution, with respect to the standard Micromegas. In some configuration the resistive coating is able to reduce the discharge currents at least by a factor of 100.Micromegas technology is a promising candidate to replace Atlas forward muon chambers -tracking and trigger- for future HL-LHC upgrade of the experiment. The increase on background and pile-up event probability requires detector performances which are currently under studies in intensive RD activities. We studied performances of four different resistive Micromegas detectors with different read-out strip pitches. These chambers were tested using \sim120 GeV momentum pions, at H6 CERN-SPS beam line in autumn 2010. For a strip pitch 500 micrometers we measure a resolution of \sim90 micrometers and a efficiency of \sim98%. The track angle effect on the efficiency was also studied. Our results show that resistive techniques induce no degradation on the efficiency or resolution, with respect to the standard Micromegas. In some configuration the resistive coating is able to reduce the discharge currents at least by a factor of 100. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1202.1074v1-abstract-full').style.display = 'none'; document.getElementById('1202.1074v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 6 February, 2012; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> February 2012. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">"Presented at the 2011 Hadron Collider Physics symposium (HCP-2011), Paris, France, November 14-18 2011, 3 pages, 6 figures. "</span> </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1202.0721">arXiv:1202.0721</a> <span> [<a href="https://arxiv.org/pdf/1202.0721">pdf</a>, <a href="https://arxiv.org/format/1202.0721">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Instrumentation and Detectors">physics.ins-det</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="High Energy Physics - Experiment">hep-ex</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1088/1748-0221/7/06/T06001">10.1088/1748-0221/7/06/T06001 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> NEXT-100 Technical Design Report (TDR). Executive Summary </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=NEXT+Collaboration"> NEXT Collaboration</a>, <a href="/search/physics?searchtype=author&query=%C3%81lvarez%2C+V">V. 脕lvarez</a>, <a href="/search/physics?searchtype=author&query=Borges%2C+F+I+G+M">F. I. G. M. Borges</a>, <a href="/search/physics?searchtype=author&query=C%C3%A1rcel%2C+S">S. C谩rcel</a>, <a href="/search/physics?searchtype=author&query=Carmona%2C+J+M">J. M. Carmona</a>, <a href="/search/physics?searchtype=author&query=Castel%2C+J">J. Castel</a>, <a href="/search/physics?searchtype=author&query=Catal%C3%A1%2C+J+M">J. M. Catal谩</a>, <a href="/search/physics?searchtype=author&query=Cebri%C3%A1n%2C+S">S. Cebri谩n</a>, <a href="/search/physics?searchtype=author&query=Cervera%2C+A">A. Cervera</a>, <a href="/search/physics?searchtype=author&query=Chan%2C+D">D. Chan</a>, <a href="/search/physics?searchtype=author&query=Conde%2C+C+A+N">C. A. N. Conde</a>, <a href="/search/physics?searchtype=author&query=Dafni%2C+T">T. Dafni</a>, <a href="/search/physics?searchtype=author&query=Dias%2C+T+H+V+T">T. H. V. T. Dias</a>, <a href="/search/physics?searchtype=author&query=D%C3%ADaz%2C+J">J. D铆az</a>, <a href="/search/physics?searchtype=author&query=Egorov%2C+M">M. Egorov</a>, <a href="/search/physics?searchtype=author&query=Esteve%2C+R">R. Esteve</a>, <a href="/search/physics?searchtype=author&query=Evtoukhovitch%2C+P">P. Evtoukhovitch</a>, <a href="/search/physics?searchtype=author&query=Fernandes%2C+L+M+P">L. M. P. Fernandes</a>, <a href="/search/physics?searchtype=author&query=Ferrario%2C+P">P. Ferrario</a>, <a href="/search/physics?searchtype=author&query=Ferreira%2C+A+L">A. L. Ferreira</a>, <a href="/search/physics?searchtype=author&query=Ferrer-Ribas%2C+E">E. Ferrer-Ribas</a>, <a href="/search/physics?searchtype=author&query=Freitas%2C+E+D+C">E. D. C. Freitas</a>, <a href="/search/physics?searchtype=author&query=Gehman%2C+V+M">V. M. Gehman</a>, <a href="/search/physics?searchtype=author&query=Gil%2C+A">A. Gil</a>, <a href="/search/physics?searchtype=author&query=Giomataris%2C+I">I. Giomataris</a> , et al. (62 additional authors not shown) </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="1202.0721v2-abstract-short" style="display: inline;"> In this Technical Design Report (TDR) we describe the NEXT-100 detector that will search for neutrinoless double beta decay (bbonu) in Xe-136 at the Laboratorio Subterraneo de Canfranc (LSC), in Spain. The document formalizes the design presented in our Conceptual Design Report (CDR): an electroluminescence time projection chamber, with separate readout planes for calorimetry and tracking, located… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1202.0721v2-abstract-full').style.display = 'inline'; document.getElementById('1202.0721v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1202.0721v2-abstract-full" style="display: none;"> In this Technical Design Report (TDR) we describe the NEXT-100 detector that will search for neutrinoless double beta decay (bbonu) in Xe-136 at the Laboratorio Subterraneo de Canfranc (LSC), in Spain. The document formalizes the design presented in our Conceptual Design Report (CDR): an electroluminescence time projection chamber, with separate readout planes for calorimetry and tracking, located, respectively, behind cathode and anode. The detector is designed to hold a maximum of about 150 kg of xenon at 15 bar, or 100 kg at 10 bar. This option builds in the capability to increase the total isotope mass by 50% while keeping the operating pressure at a manageable level. The readout plane performing the energy measurement is composed of Hamamatsu R11410-10 photomultipliers, specially designed for operation in low-background, xenon-based detectors. Each individual PMT will be isolated from the gas by an individual, pressure resistant enclosure and will be coupled to the sensitive volume through a sapphire window. The tracking plane consists in an array of Hamamatsu S10362-11-050P MPPCs used as tracking pixels. They will be arranged in square boards holding 64 sensors (8 times8) with a 1-cm pitch. The inner walls of the TPC, the sapphire windows and the boards holding the MPPCs will be coated with tetraphenyl butadiene (TPB), a wavelength shifter, to improve the light collection. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1202.0721v2-abstract-full').style.display = 'none'; document.getElementById('1202.0721v2-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 16 April, 2012; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 3 February, 2012; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> February 2012. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">32 pages, 22 figures, 5 tables</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> JINST 7 (2012) T06001 </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1201.3012">arXiv:1201.3012</a> <span> [<a href="https://arxiv.org/pdf/1201.3012">pdf</a>, <a href="https://arxiv.org/format/1201.3012">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Instrumentation and Detectors">physics.ins-det</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Instrumentation and Methods for Astrophysics">astro-ph.IM</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="High Energy Physics - Experiment">hep-ex</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1088/1748-0221/7/04/P04007">10.1088/1748-0221/7/04/P04007 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Characterization of microbulk detectors in argon- and neon-based mixtures </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Iguaz%2C+F+J">F. J. Iguaz</a>, <a href="/search/physics?searchtype=author&query=Ferrer-Ribas%2C+E">E. Ferrer-Ribas</a>, <a href="/search/physics?searchtype=author&query=Giganon%2C+A">A. Giganon</a>, <a href="/search/physics?searchtype=author&query=Giomataris%2C+I">I. Giomataris</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="1201.3012v1-abstract-short" style="display: inline;"> A recent Micromegas manufacturing technique, so called Microbulk, has been developed, improving the uniformity and stability of this kind of detectors. Excellent energy resolutions have been obtained, reaching values as low as 11% FWHM at 5.9 keV in Ar+5%iC4H10. This detector has other advantages like its flexible structure, low material budget and high radio-purity. Two microbulk detectors with g… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1201.3012v1-abstract-full').style.display = 'inline'; document.getElementById('1201.3012v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1201.3012v1-abstract-full" style="display: none;"> A recent Micromegas manufacturing technique, so called Microbulk, has been developed, improving the uniformity and stability of this kind of detectors. Excellent energy resolutions have been obtained, reaching values as low as 11% FWHM at 5.9 keV in Ar+5%iC4H10. This detector has other advantages like its flexible structure, low material budget and high radio-purity. Two microbulk detectors with gaps of 50 and 25 um have been characterized in argon- and neon-based mixtures with ethane, isobutane and cyclohexane. The results will be presented and discussed. The gain curves have been fitted to the Rose-Korff gain model and dependences of the electron mean free path and the threshold energy for ionization have been obtained. The possible relation between these two parameters and the energy resolution will be also discussed. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1201.3012v1-abstract-full').style.display = 'none'; document.getElementById('1201.3012v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 14 January, 2012; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> January 2012. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">Submitted to the Journal of Instrumentation</span> </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1201.2018">arXiv:1201.2018</a> <span> [<a href="https://arxiv.org/pdf/1201.2018">pdf</a>, <a href="https://arxiv.org/format/1201.2018">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Instrumentation and Detectors">physics.ins-det</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="High Energy Physics - Experiment">hep-ex</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1088/1748-0221/7/02/P02010">10.1088/1748-0221/7/02/P02010 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> SiPMs coated with TPB : coating protocol and characterization for NEXT </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=%C3%81lvarez%2C+V">V. 脕lvarez</a>, <a href="/search/physics?searchtype=author&query=Agramunt%2C+J">J. Agramunt</a>, <a href="/search/physics?searchtype=author&query=Ball%2C+M">M. Ball</a>, <a href="/search/physics?searchtype=author&query=Batall%C3%A9%2C+M">M. Batall茅</a>, <a href="/search/physics?searchtype=author&query=Bayarri%2C+J">J. Bayarri</a>, <a href="/search/physics?searchtype=author&query=Borges%2C+F+I+G">F. I. G. Borges</a>, <a href="/search/physics?searchtype=author&query=Bolink%2C+H">H. Bolink</a>, <a href="/search/physics?searchtype=author&query=Brine%2C+H">H. Brine</a>, <a href="/search/physics?searchtype=author&query=C%C3%A1rcel%2C+S">S. C谩rcel</a>, <a href="/search/physics?searchtype=author&query=Carmona%2C+J+M">J. M. Carmona</a>, <a href="/search/physics?searchtype=author&query=Castel%2C+J">J. Castel</a>, <a href="/search/physics?searchtype=author&query=Catal%C3%A1%2C+J+M">J. M. Catal谩</a>, <a href="/search/physics?searchtype=author&query=Cebri%C3%A1n%2C+S">S. Cebri谩n</a>, <a href="/search/physics?searchtype=author&query=Cervera%2C+A">A. Cervera</a>, <a href="/search/physics?searchtype=author&query=Chan%2C+D">D. Chan</a>, <a href="/search/physics?searchtype=author&query=Conde%2C+C+A+N">C. A. N. Conde</a>, <a href="/search/physics?searchtype=author&query=Dafni%2C+T">T. Dafni</a>, <a href="/search/physics?searchtype=author&query=Dias%2C+T+H+V+T">T. H. V. T. Dias</a>, <a href="/search/physics?searchtype=author&query=D%C3%ADaz%2C+J">J. D铆az</a>, <a href="/search/physics?searchtype=author&query=Esteve%2C+R">R. Esteve</a>, <a href="/search/physics?searchtype=author&query=Evtoukhovitch%2C+P">P. Evtoukhovitch</a>, <a href="/search/physics?searchtype=author&query=Ferrando%2C+J">J. Ferrando</a>, <a href="/search/physics?searchtype=author&query=Fernandes%2C+L+M+P">L. M. P. Fernandes</a>, <a href="/search/physics?searchtype=author&query=Ferrario%2C+P">P. Ferrario</a>, <a href="/search/physics?searchtype=author&query=Ferreira%2C+A+L">A. L. Ferreira</a> , et al. (69 additional authors not shown) </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="1201.2018v1-abstract-short" style="display: inline;"> Silicon photomultipliers (SiPM) are the photon detectors chosen for the tracking readout in NEXT, a neutrinoless 尾尾 decay experiment which uses a high pressure gaseous xenon time projection chamber (TPC). The reconstruction of event track and topology in this gaseous detector is a key handle for background rejection. Among the commercially available sensors that can be used for tracking, SiPMs off… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1201.2018v1-abstract-full').style.display = 'inline'; document.getElementById('1201.2018v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1201.2018v1-abstract-full" style="display: none;"> Silicon photomultipliers (SiPM) are the photon detectors chosen for the tracking readout in NEXT, a neutrinoless 尾尾 decay experiment which uses a high pressure gaseous xenon time projection chamber (TPC). The reconstruction of event track and topology in this gaseous detector is a key handle for background rejection. Among the commercially available sensors that can be used for tracking, SiPMs offer important advantages, mainly high gain, ruggedness, cost-effectiveness and radio-purity. Their main drawback, however, is their non sensitivity in the emission spectrum of the xenon scintillation (peak at 175 nm). This is overcome by coating these sensors with the organic wavelength shifter tetraphenyl butadienne (TPB). In this paper we describe the protocol developed for coating the SiPMs with TPB and the measurements performed for characterizing the coatings as well as the performance of the coated sensors in the UV-VUV range. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1201.2018v1-abstract-full').style.display = 'none'; document.getElementById('1201.2018v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 10 January, 2012; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> January 2012. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">Submitted to the Journal of Instrumentation on december 26th 2011</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> JINST 7 (2012) P02010 </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1201.1843">arXiv:1201.1843</a> <span> [<a href="https://arxiv.org/pdf/1201.1843">pdf</a>, <a href="https://arxiv.org/format/1201.1843">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Instrumentation and Detectors">physics.ins-det</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="High Energy Physics - Experiment">hep-ex</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1109/TNS.2012.2198492">10.1109/TNS.2012.2198492 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Performances and ageing study of resistive-anodes Micromegas detectors for HL-LHC environment </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Jeanneau%2C+F">F. Jeanneau</a>, <a href="/search/physics?searchtype=author&query=Alexopoulos%2C+T">T. Alexopoulos</a>, <a href="/search/physics?searchtype=author&query=Atti%C3%A9%2C+D">D. Atti茅</a>, <a href="/search/physics?searchtype=author&query=Boyer%2C+M">M. Boyer</a>, <a href="/search/physics?searchtype=author&query=Derr%C3%A9%2C+J">J. Derr茅</a>, <a href="/search/physics?searchtype=author&query=Fanourakis%2C+G">G. Fanourakis</a>, <a href="/search/physics?searchtype=author&query=Ferrer-Ribas%2C+E">E. Ferrer-Ribas</a>, <a href="/search/physics?searchtype=author&query=Gal%C3%A1n%2C+J">J. Gal谩n</a>, <a href="/search/physics?searchtype=author&query=Gazis%2C+E">E. Gazis</a>, <a href="/search/physics?searchtype=author&query=Geralis%2C+T">T. Geralis</a>, <a href="/search/physics?searchtype=author&query=Giganon%2C+A">A. Giganon</a>, <a href="/search/physics?searchtype=author&query=Giomataris%2C+I">I. Giomataris</a>, <a href="/search/physics?searchtype=author&query=Herlant%2C+S">S. Herlant</a>, <a href="/search/physics?searchtype=author&query=Manjarr%C3%A9s%2C+J">J. Manjarr茅s</a>, <a href="/search/physics?searchtype=author&query=Ntomari%2C+E">E. Ntomari</a>, <a href="/search/physics?searchtype=author&query=Schune%2C+P">Ph. Schune</a>, <a href="/search/physics?searchtype=author&query=Titov%2C+M">M. Titov</a>, <a href="/search/physics?searchtype=author&query=Tsipolitis%2C+G">G. Tsipolitis</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="1201.1843v1-abstract-short" style="display: inline;"> With the tenfold luminosity increase envisaged at the HL-LHC, the background (photons, neutrons, ...) and the event pile-up probability are expected to increase in proportion in the different experiments, especially in the forward regions like, for instance, the muons chambers of the ATLAS detector. Detectors based on the Micromegas principle should be good alternatives for the detector upgrade in… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1201.1843v1-abstract-full').style.display = 'inline'; document.getElementById('1201.1843v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1201.1843v1-abstract-full" style="display: none;"> With the tenfold luminosity increase envisaged at the HL-LHC, the background (photons, neutrons, ...) and the event pile-up probability are expected to increase in proportion in the different experiments, especially in the forward regions like, for instance, the muons chambers of the ATLAS detector. Detectors based on the Micromegas principle should be good alternatives for the detector upgrade in the HL-LHC framework because of a good spatial (<100 \mum) and time (few ns) resolutions, high-rate capability, radiation hardness, good robustness and the possibility to build large areas. The aim of this study is to demonstrate that it is possible to reduce the discharge probability and protect the electronics by using a resistive anode plane in a high flux hadrons environment. Several prototypes of 10x10 cm2, with different pitches (0.5 to 2 mm) and different resistive layers have been tested at CERN (pi+@SPS). Several tests have been performed with a telescope at different voltages to assess the performances of the detectors in terms of position resolution and efficiency. The spark behaviour in these conditions has also been evaluated. Resistive coating has been shown to be a successful method to reduce the effect of sparks on the efficiency of micromegas. A good spatial resolution (~80 \mum) can be reached with a resistive strip coating detector of 1mm pitch and a high efficiency (> 98%) can be achieved with resistive-anode micromegas detector. An X-rays irradiation has been also performed, showing no ageing effect after more than 21 days exposure and an integrated charge of almost 1C. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1201.1843v1-abstract-full').style.display = 'none'; document.getElementById('1201.1843v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 9 January, 2012; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> January 2012. </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1110.2643">arXiv:1110.2643</a> <span> [<a href="https://arxiv.org/pdf/1110.2643">pdf</a>, <a href="https://arxiv.org/format/1110.2643">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Instrumentation and Detectors">physics.ins-det</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="High Energy Physics - Experiment">hep-ex</span> </div> </div> <p class="title is-5 mathjax"> The discrimination capabilities of Micromegas detectors at low energy </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Iguaz%2C+F+J">F. J. Iguaz</a>, <a href="/search/physics?searchtype=author&query=Dafni%2C+T">T. Dafni</a>, <a href="/search/physics?searchtype=author&query=Ferrer-Ribas%2C+E">E. Ferrer-Ribas</a>, <a href="/search/physics?searchtype=author&query=Gal%C3%A1n%2C+J">J. Gal谩n</a>, <a href="/search/physics?searchtype=author&query=Garc%C3%ADa%2C+J+A">J. A. Garc铆a</a>, <a href="/search/physics?searchtype=author&query=Gardikiotis%2C+A">A. Gardikiotis</a>, <a href="/search/physics?searchtype=author&query=Giomataris%2C+I">I. Giomataris</a>, <a href="/search/physics?searchtype=author&query=Irastorza%2C+I+G">I. G. Irastorza</a>, <a href="/search/physics?searchtype=author&query=Mols%2C+J+P">J. P. Mols</a>, <a href="/search/physics?searchtype=author&query=Papaevangelou%2C+T">T. Papaevangelou</a>, <a href="/search/physics?searchtype=author&query=Rodr%C3%ADguez%2C+A">A. Rodr铆guez</a>, <a href="/search/physics?searchtype=author&query=Tom%C3%A1s%2C+A">A. Tom谩s</a>, <a href="/search/physics?searchtype=author&query=Vafeiadis%2C+T">T. Vafeiadis</a>, <a href="/search/physics?searchtype=author&query=Yildiz%2C+C">C. Yildiz</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="1110.2643v1-abstract-short" style="display: inline;"> The latest generation of Micromegas detectors show a good energy resolution, spatial resolution and low threshold, which make them idoneous in low energy applications. Two micromegas detectors have been built for dark matter experiments: CAST, which uses a dipole magnet to convert axion into detectable x-ray photons, and MIMAC, which aims to reconstruct the tracks of low energy nuclear recoils in… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1110.2643v1-abstract-full').style.display = 'inline'; document.getElementById('1110.2643v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1110.2643v1-abstract-full" style="display: none;"> The latest generation of Micromegas detectors show a good energy resolution, spatial resolution and low threshold, which make them idoneous in low energy applications. Two micromegas detectors have been built for dark matter experiments: CAST, which uses a dipole magnet to convert axion into detectable x-ray photons, and MIMAC, which aims to reconstruct the tracks of low energy nuclear recoils in a mixture of CF4 and CHF3. These readouts have been respectively built with the microbulk and bulk techniques, which show different gain, electron transmission and energy resolutions. The detectors and the operation conditions will be described in detail as well as their discrimination capabilities for low energy photons will be discussed. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1110.2643v1-abstract-full').style.display = 'none'; document.getElementById('1110.2643v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 12 October, 2011; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> October 2011. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">To be published in the proceedings of the TIPP2011 conference (Physics Procedia)</span> </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1110.2641">arXiv:1110.2641</a> <span> [<a href="https://arxiv.org/pdf/1110.2641">pdf</a>, <a href="https://arxiv.org/format/1110.2641">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Instrumentation and Detectors">physics.ins-det</span> </div> </div> <p class="title is-5 mathjax"> New developments in Micromegas Microbulk detectors </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Iguaz%2C+F+J">F. J. Iguaz</a>, <a href="/search/physics?searchtype=author&query=Andriamonje%2C+S">S. Andriamonje</a>, <a href="/search/physics?searchtype=author&query=Belloni%2C+F">F. Belloni</a>, <a href="/search/physics?searchtype=author&query=Berthoumieux%2C+E">E. Berthoumieux</a>, <a href="/search/physics?searchtype=author&query=Calviani%2C+M">M. Calviani</a>, <a href="/search/physics?searchtype=author&query=Dafni%2C+T">T. Dafni</a>, <a href="/search/physics?searchtype=author&query=De+Oliveira%2C+R">R. De Oliveira</a>, <a href="/search/physics?searchtype=author&query=Ferrer-Ribas%2C+E">E. Ferrer-Ribas</a>, <a href="/search/physics?searchtype=author&query=Gal%C3%A1n%2C+J">J. Gal谩n</a>, <a href="/search/physics?searchtype=author&query=Garc%C3%ADa%2C+J+A">J. A. Garc铆a</a>, <a href="/search/physics?searchtype=author&query=Giomataris%2C+I">I. Giomataris</a>, <a href="/search/physics?searchtype=author&query=Guerrero%2C+C">C. Guerrero</a>, <a href="/search/physics?searchtype=author&query=Gunsing%2C+F">F. Gunsing</a>, <a href="/search/physics?searchtype=author&query=Herrera%2C+D+C">D. C. Herrera</a>, <a href="/search/physics?searchtype=author&query=Irastorza%2C+I+G">I. G. Irastorza</a>, <a href="/search/physics?searchtype=author&query=Papaevangelou%2C+T">T. Papaevangelou</a>, <a href="/search/physics?searchtype=author&query=Rodr%C3%ADguez%2C+A">A. Rodr铆guez</a>, <a href="/search/physics?searchtype=author&query=Tom%C3%A1s%2C+A">A. Tom谩s</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="1110.2641v1-abstract-short" style="display: inline;"> A new Micromegas manufacturing technique, based on kapton etching technology, has been recently developed, improving the uniformity and stability of this kind of readouts. Excellent energy resolutions have been obtained, reaching 11% FWHM for the 5.9 keV photon peak of 55Fe source and 1.8% FWHM for the 5.5 MeV alpha peak of the 241Am source. The new detector has other advantages like its flexible… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1110.2641v1-abstract-full').style.display = 'inline'; document.getElementById('1110.2641v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1110.2641v1-abstract-full" style="display: none;"> A new Micromegas manufacturing technique, based on kapton etching technology, has been recently developed, improving the uniformity and stability of this kind of readouts. Excellent energy resolutions have been obtained, reaching 11% FWHM for the 5.9 keV photon peak of 55Fe source and 1.8% FWHM for the 5.5 MeV alpha peak of the 241Am source. The new detector has other advantages like its flexible structure, low material and high radio-purity. The two actual approaches of this technique will be described and the features of these readouts in argon-isobutane mixtures will be presented. Moreover, the low material present in the amplification gap makes these detectors approximate the Rose and Korff model for the avalanche amplification, which will be discussed for the same type of mixtures. Finally, we will present several applications of the microbulk technique. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1110.2641v1-abstract-full').style.display = 'none'; document.getElementById('1110.2641v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 12 October, 2011; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> October 2011. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">To be published in the Proceedings of the TIPP2011 conference (Physics Procedia)</span> </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1110.2608">arXiv:1110.2608</a> <span> [<a href="https://arxiv.org/pdf/1110.2608">pdf</a>, <a href="https://arxiv.org/format/1110.2608">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Instrumentation and Detectors">physics.ins-det</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Instrumentation and Methods for Astrophysics">astro-ph.IM</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1051/eas/1253019">10.1051/eas/1253019 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Low X-ray bakground measurements at the Underground Canfranc Laboratory </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Galan%2C+J">J. Galan</a>, <a href="/search/physics?searchtype=author&query=Aune%2C+S">S. Aune</a>, <a href="/search/physics?searchtype=author&query=Dafni%2C+T">T. Dafni</a>, <a href="/search/physics?searchtype=author&query=Fanourakis%2C+G">G. Fanourakis</a>, <a href="/search/physics?searchtype=author&query=Ferrer-Ribas%2C+E">E. Ferrer-Ribas</a>, <a href="/search/physics?searchtype=author&query=Garcia%2C+J+A">J. A. Garcia</a>, <a href="/search/physics?searchtype=author&query=Gardikiotis%2C+A">A. Gardikiotis</a>, <a href="/search/physics?searchtype=author&query=Geralis%2C+T">T. Geralis</a>, <a href="/search/physics?searchtype=author&query=Giomataris%2C+I">I. Giomataris</a>, <a href="/search/physics?searchtype=author&query=Gomez%2C+H">H. Gomez</a>, <a href="/search/physics?searchtype=author&query=Garza%2C+J+G">J. G. Garza</a>, <a href="/search/physics?searchtype=author&query=Herrera%2C+D+C">D. C. Herrera</a>, <a href="/search/physics?searchtype=author&query=Iguaz%2C+F+J">F. J. Iguaz</a>, <a href="/search/physics?searchtype=author&query=Irastorza%2C+I+G">I. G. Irastorza</a>, <a href="/search/physics?searchtype=author&query=Luzon%2C+G">G. Luzon</a>, <a href="/search/physics?searchtype=author&query=Papaevangelou%2C+T">T. Papaevangelou</a>, <a href="/search/physics?searchtype=author&query=Rodriguez%2C+A">A. Rodriguez</a>, <a href="/search/physics?searchtype=author&query=Ruz%2C+J">J. Ruz</a>, <a href="/search/physics?searchtype=author&query=Segui%2C+L">L. Segui</a>, <a href="/search/physics?searchtype=author&query=Tomas%2C+A">A. Tomas</a>, <a href="/search/physics?searchtype=author&query=Vafeiadis%2C+T">T. Vafeiadis</a>, <a href="/search/physics?searchtype=author&query=Yildiz%2C+S+C">S. C. Yildiz</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="1110.2608v3-abstract-short" style="display: inline;"> Micromegas detectors, thanks to the good spatial and temporal discrimination capabilities, are good candidates for rare event search experiments. Recent X-ray background levels achieved by these detectors in the CAST experiment have motivated further studies in the nature of the background levels measured. In particular, different shielding configurations have been tested at the Canfranc Undergrou… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1110.2608v3-abstract-full').style.display = 'inline'; document.getElementById('1110.2608v3-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1110.2608v3-abstract-full" style="display: none;"> Micromegas detectors, thanks to the good spatial and temporal discrimination capabilities, are good candidates for rare event search experiments. Recent X-ray background levels achieved by these detectors in the CAST experiment have motivated further studies in the nature of the background levels measured. In particular, different shielding configurations have been tested at the Canfranc Underground Laboratory, using a microbulk type detector which was previously running at the CAST experiment. The first results underground show that this technology, which is made of low radiative materials, is able to reach background levels up to $2 \times 10^{-7}$keV$^{-1}$s$^{-1}$cm$^{-2}$ with a proper shielding. Moreover, the experimental background measurements are complemented with Geant4 simulations which allow to understand the origin of the background, and to optimize future shielding set-ups. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1110.2608v3-abstract-full').style.display = 'none'; document.getElementById('1110.2608v3-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 25 October, 2011; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 12 October, 2011; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> October 2011. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">Proceedings of the 3rd International conference on Directional Detection of Dark Matter (CYGNUS 2011), Aussois, France, 8-10 June 2011</span> </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1109.4021">arXiv:1109.4021</a> <span> [<a href="https://arxiv.org/pdf/1109.4021">pdf</a>, <a href="https://arxiv.org/format/1109.4021">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Instrumentation and Detectors">physics.ins-det</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="High Energy Physics - Experiment">hep-ex</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1051/eas/1253018">10.1051/eas/1253018 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Status of R&D on Micromegas for Rare Event Searches: The T-REX project </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Irastorza%2C+I+G">I. G. Irastorza</a>, <a href="/search/physics?searchtype=author&query=Castel%2C+J">J. Castel</a>, <a href="/search/physics?searchtype=author&query=Cebri%C3%A1n%2C+S">S. Cebri谩n</a>, <a href="/search/physics?searchtype=author&query=Dafni%2C+T">T. Dafni</a>, <a href="/search/physics?searchtype=author&query=Fanourakis%2C+G">G. Fanourakis</a>, <a href="/search/physics?searchtype=author&query=Ferrer-Ribas%2C+E">E. Ferrer-Ribas</a>, <a href="/search/physics?searchtype=author&query=Fortu%C3%B1o%2C+D">D. Fortu帽o</a>, <a href="/search/physics?searchtype=author&query=Esteban%2C+L">L. Esteban</a>, <a href="/search/physics?searchtype=author&query=Gal%C3%A1n%2C+J">J. Gal谩n</a>, <a href="/search/physics?searchtype=author&query=Garc%C3%ADa%2C+J+A">J. A. Garc铆a</a>, <a href="/search/physics?searchtype=author&query=Gardikiotis%2C+A">A. Gardikiotis</a>, <a href="/search/physics?searchtype=author&query=Garza%2C+J+G">J. G. Garza</a>, <a href="/search/physics?searchtype=author&query=Geralis%2C+T">T. Geralis</a>, <a href="/search/physics?searchtype=author&query=Giomataris%2C+I">I. Giomataris</a>, <a href="/search/physics?searchtype=author&query=G%C3%B3mez%2C+H">H. G贸mez</a>, <a href="/search/physics?searchtype=author&query=Herrera%2C+D+C">D. C. Herrera</a>, <a href="/search/physics?searchtype=author&query=Iguaz%2C+F+J">F. J. Iguaz</a>, <a href="/search/physics?searchtype=author&query=Luz%C3%B3n%2C+G">G. Luz贸n</a>, <a href="/search/physics?searchtype=author&query=Mols%2C+J+P">J. P. Mols</a>, <a href="/search/physics?searchtype=author&query=Ortiz%2C+A">A. Ortiz</a>, <a href="/search/physics?searchtype=author&query=Papaevangelou%2C+T">T. Papaevangelou</a>, <a href="/search/physics?searchtype=author&query=Rodr%C3%ADguez%2C+A">A. Rodr铆guez</a>, <a href="/search/physics?searchtype=author&query=Ruz%2C+J">J. Ruz</a>, <a href="/search/physics?searchtype=author&query=Segu%C3%AD%2C+L">L. Segu铆</a>, <a href="/search/physics?searchtype=author&query=Tom%C3%A1s%2C+A">A. Tom谩s</a> , et al. (2 additional authors not shown) </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="1109.4021v1-abstract-short" style="display: inline;"> The T-REX project aims at developing novel readout techniques for Time Projection Chambers in experiments searching for rare events. The enhanced performance of the latest Micromegas readouts in issues like energy resolution, gain stability, homogeneity, material budget, combined with low background techniques, is opening new windows of opportunity for their application in this field. Here we revi… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1109.4021v1-abstract-full').style.display = 'inline'; document.getElementById('1109.4021v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1109.4021v1-abstract-full" style="display: none;"> The T-REX project aims at developing novel readout techniques for Time Projection Chambers in experiments searching for rare events. The enhanced performance of the latest Micromegas readouts in issues like energy resolution, gain stability, homogeneity, material budget, combined with low background techniques, is opening new windows of opportunity for their application in this field. Here we review the latest results regarding the use and prospects of Micromegas readouts in axion physics (CAST and the future helioscope), as well as the R&D carried out within NEXT, to search for the neutrinoless double-beta decay. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1109.4021v1-abstract-full').style.display = 'none'; document.getElementById('1109.4021v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 19 September, 2011; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> September 2011. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">Proceedings of the 3rd International conference on Directional Detection of Dark Matter (CYGNUS 2011), Aussois, France, 8-10 June 2011</span> </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1109.1675">arXiv:1109.1675</a> <span> [<a href="https://arxiv.org/pdf/1109.1675">pdf</a>, <a href="https://arxiv.org/format/1109.1675">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Instrumentation and Detectors">physics.ins-det</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Instrumentation and Methods for Astrophysics">astro-ph.IM</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1051/eas/1253020">10.1051/eas/1253020 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Micromegas detector developments for MIMAC </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Ferrer-Ribas%2C+E">E. Ferrer-Ribas</a>, <a href="/search/physics?searchtype=author&query=Atti%C3%A9%2C+D">D. Atti茅</a>, <a href="/search/physics?searchtype=author&query=Calvet%2C+D">D. Calvet</a>, <a href="/search/physics?searchtype=author&query=Colas%2C+P">P. Colas</a>, <a href="/search/physics?searchtype=author&query=Druillole%2C+F">F. Druillole</a>, <a href="/search/physics?searchtype=author&query=Giomataris%2C+Y">Y. Giomataris</a>, <a href="/search/physics?searchtype=author&query=Iguaz%2C+F+J">F. J. Iguaz</a>, <a href="/search/physics?searchtype=author&query=Mols%2C+J+P">J. P. Mols</a>, <a href="/search/physics?searchtype=author&query=Pancin%2C+J">J. Pancin</a>, <a href="/search/physics?searchtype=author&query=Papaevangelou%2C+T">T. Papaevangelou</a>, <a href="/search/physics?searchtype=author&query=Billard%2C+J">J. Billard</a>, <a href="/search/physics?searchtype=author&query=Bosson%2C+G">G. Bosson</a>, <a href="/search/physics?searchtype=author&query=Bouly%2C+J+L">J. L. Bouly</a>, <a href="/search/physics?searchtype=author&query=Bourrion%2C+O">O. Bourrion</a>, <a href="/search/physics?searchtype=author&query=Fourel%2C+C">Ch. Fourel</a>, <a href="/search/physics?searchtype=author&query=Grignon%2C+C">C. Grignon</a>, <a href="/search/physics?searchtype=author&query=Guillaudin%2C+O">O. Guillaudin</a>, <a href="/search/physics?searchtype=author&query=Mayet%2C+F">F. Mayet</a>, <a href="/search/physics?searchtype=author&query=Richer%2C+J+P">J. P. Richer</a>, <a href="/search/physics?searchtype=author&query=Santos%2C+D">D. Santos</a>, <a href="/search/physics?searchtype=author&query=Golabek%2C+C">C. Golabek</a>, <a href="/search/physics?searchtype=author&query=Lebreton%2C+L">L. Lebreton</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="1109.1675v2-abstract-short" style="display: inline;"> The aim of the MIMAC project is to detect non-baryonic Dark Matter with a directional TPC. The recent Micromegas efforts towards building a large size detector will be described, in particular the characterization measurements of a prototype detector of 10 $\times$ 10 cm$^2$ with a 2 dimensional readout plane. Track reconstruction with alpha particles will be shown. </span> <span class="abstract-full has-text-grey-dark mathjax" id="1109.1675v2-abstract-full" style="display: none;"> The aim of the MIMAC project is to detect non-baryonic Dark Matter with a directional TPC. The recent Micromegas efforts towards building a large size detector will be described, in particular the characterization measurements of a prototype detector of 10 $\times$ 10 cm$^2$ with a 2 dimensional readout plane. Track reconstruction with alpha particles will be shown. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1109.1675v2-abstract-full').style.display = 'none'; document.getElementById('1109.1675v2-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 12 September, 2011; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 8 September, 2011; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> September 2011. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">8 pages, 7 figures Proceedings of the 3rd International conference on Directional Detection of Dark Matter (CYGNUS 2011), Aussois, France, 8-10 June 2011; corrections on author affiliations</span> </p> </li> </ol> <nav 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