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</div> <div class="control"> <button class="button is-small is-link">Go</button> </div> </div> </form> </div> </div> <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/2406.05713">arXiv:2406.05713</a> <span> [<a href="https://arxiv.org/pdf/2406.05713">pdf</a>, <a href="https://arxiv.org/format/2406.05713">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/10.1140/epjc/s10052-024-13471-5">10.1140/epjc/s10052-024-13471-5 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Enhancing the light yield of He:CF$_4$ based gaseous detector </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Amaro%2C+F+D">F. D. Amaro</a>, <a href="/search/physics?searchtype=author&query=Antonietti%2C+R">R. Antonietti</a>, <a href="/search/physics?searchtype=author&query=Baracchini%2C+E">E. Baracchini</a>, <a href="/search/physics?searchtype=author&query=Benussi%2C+L">L. Benussi</a>, <a href="/search/physics?searchtype=author&query=Bianco%2C+S">S. Bianco</a>, <a href="/search/physics?searchtype=author&query=Campagnola%2C+R">R. Campagnola</a>, <a href="/search/physics?searchtype=author&query=Capoccia%2C+C">C. Capoccia</a>, <a href="/search/physics?searchtype=author&query=Caponero%2C+M">M. Caponero</a>, <a href="/search/physics?searchtype=author&query=Cardoso%2C+D+S">D. S. Cardoso</a>, <a href="/search/physics?searchtype=author&query=de+Carvalho%2C+L+G+M">L. G. M. de Carvalho</a>, <a href="/search/physics?searchtype=author&query=Cavoto%2C+G">G. Cavoto</a>, <a href="/search/physics?searchtype=author&query=Costa%2C+I+A">I. Abritta Costa</a>, <a href="/search/physics?searchtype=author&query=Croce%2C+A">A. Croce</a>, <a href="/search/physics?searchtype=author&query=Dan%C3%A9%2C+E">E. Dan茅</a>, <a href="/search/physics?searchtype=author&query=Dho%2C+G">G. Dho</a>, <a href="/search/physics?searchtype=author&query=Di+Giambattista%2C+F">F. Di Giambattista</a>, <a href="/search/physics?searchtype=author&query=Di+Marco%2C+E">E. Di Marco</a>, <a href="/search/physics?searchtype=author&query=D%27Astolfo%2C+M">M. D'Astolfo</a>, <a href="/search/physics?searchtype=author&query=D%27Imperio%2C+G">G. D'Imperio</a>, <a href="/search/physics?searchtype=author&query=Fiorina%2C+D">D. Fiorina</a>, <a href="/search/physics?searchtype=author&query=Iacoangeli%2C+F">F. Iacoangeli</a>, <a href="/search/physics?searchtype=author&query=Islam%2C+Z">Z. Islam</a>, <a href="/search/physics?searchtype=author&query=J%C3%B9nior%2C+H+P+L">H. P. L. J霉nior</a>, <a href="/search/physics?searchtype=author&query=Kemp%2C+E">E. Kemp</a>, <a href="/search/physics?searchtype=author&query=Maccarrone%2C+G">G. Maccarrone</a> , et al. (29 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="2406.05713v2-abstract-short" style="display: inline;"> The CYGNO experiment aims to build a large ($\mathcal{O}(10)$ m$^3$) directional detector for rare event searches, such as nuclear recoils (NRs) induced by dark matter (DM), such as weakly interactive massive particles (WIMPs). The detector concept comprises a time projection chamber (TPC), filled with a He:CF$_4$ 60/40 scintillating gas mixture at room temperature and atmospheric pressure, equipp… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2406.05713v2-abstract-full').style.display = 'inline'; document.getElementById('2406.05713v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2406.05713v2-abstract-full" style="display: none;"> The CYGNO experiment aims to build a large ($\mathcal{O}(10)$ m$^3$) directional detector for rare event searches, such as nuclear recoils (NRs) induced by dark matter (DM), such as weakly interactive massive particles (WIMPs). The detector concept comprises a time projection chamber (TPC), filled with a He:CF$_4$ 60/40 scintillating gas mixture at room temperature and atmospheric pressure, equipped with an amplification stage made of a stack of three gas electron multipliers (GEMs) which are coupled to an optical readout. The latter consists in scientific CMOS (sCMOS) cameras and photomultipliers tubes (PMTs). The maximisation of the light yield of the amplification stage plays a major role in the determination of the energy threshold of the experiment. In this paper, we simulate the effect of the addition of a strong electric field below the last GEM plane on the GEM field structure and we experimentally test it by means of a 10$\times$10 cm$^2$ readout area prototype. The experimental measurements analyse stacks of different GEMs and helium concentrations in the gas mixture combined with this extra electric field, studying their performances in terms of light yield, energy resolution and intrinsic diffusion. It is found that the use of this additional electric field permits large light yield increases without degrading intrinsic characteristics of the amplification stage with respect to the regular use of GEMs. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2406.05713v2-abstract-full').style.display = 'none'; document.getElementById('2406.05713v2-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 November, 2024; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 9 June, 2024; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> June 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">Correction of typos in Section 2 and 6. Improved quality of plots with some modifications to clarify the content</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Eur. Phys. J. C 84, 1122 (2024) </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2405.17967">arXiv:2405.17967</a> <span> [<a href="https://arxiv.org/pdf/2405.17967">pdf</a>, <a href="https://arxiv.org/format/2405.17967">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"> Charge Amplification in Low Pressure CF4:SF6:He Mixtures with a Multi-Mesh ThGEM for Directional Dark Matter Searches </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Amaro%2C+F+D">F. D. Amaro</a>, <a href="/search/physics?searchtype=author&query=Baracchini%2C+E">E. Baracchini</a>, <a href="/search/physics?searchtype=author&query=Benussi%2C+L">L. Benussi</a>, <a href="/search/physics?searchtype=author&query=Bianco%2C+S">S. Bianco</a>, <a href="/search/physics?searchtype=author&query=Borra%2C+F">F. Borra</a>, <a href="/search/physics?searchtype=author&query=Capoccia%2C+C">C. Capoccia</a>, <a href="/search/physics?searchtype=author&query=Caponero%2C+M">M. Caponero</a>, <a href="/search/physics?searchtype=author&query=Cardoso%2C+D+S">D. S. Cardoso</a>, <a href="/search/physics?searchtype=author&query=Cavoto%2C+G">G. Cavoto</a>, <a href="/search/physics?searchtype=author&query=Costa%2C+I+A">I. A. Costa</a>, <a href="/search/physics?searchtype=author&query=Crane%2C+T">T. Crane</a>, <a href="/search/physics?searchtype=author&query=Dane%2C+E">E. Dane</a>, <a href="/search/physics?searchtype=author&query=DAstolfo%2C+M">M. DAstolfo</a>, <a href="/search/physics?searchtype=author&query=Dho%2C+G">G. Dho</a>, <a href="/search/physics?searchtype=author&query=Di+Giambattista%2C+F">F. Di Giambattista</a>, <a href="/search/physics?searchtype=author&query=DImperio%2C+G">G. DImperio</a>, <a href="/search/physics?searchtype=author&query=Di+Marco%2C+E">E. Di Marco</a>, <a href="/search/physics?searchtype=author&query=Santos%2C+J+M+F+D">J. M. F. Dos Santos</a>, <a href="/search/physics?searchtype=author&query=Ezeribe%2C+A+C">A. C. Ezeribe</a>, <a href="/search/physics?searchtype=author&query=Fiorina%2C+D">D. Fiorina</a>, <a href="/search/physics?searchtype=author&query=Iacoangeli%2C+F">F. Iacoangeli</a>, <a href="/search/physics?searchtype=author&query=Junior%2C+H+P+L">H. P. Lima Junior</a>, <a href="/search/physics?searchtype=author&query=Lopes%2C+G+S+P">G. S. P. Lopes</a>, <a href="/search/physics?searchtype=author&query=Maccarrone%2C+G">G. Maccarrone</a>, <a href="/search/physics?searchtype=author&query=Mano%2C+R+D+P">R. D. P. Mano</a> , et al. (24 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="2405.17967v1-abstract-short" style="display: inline;"> The CYGNO collaboration is developing next generation directional Dark Matter (DM) detection experiments, using gaseous Time Projection Chambers (TPCs), as a robust method for identifying Weakly Interacting Massive Particles (WIMPs) below the Neutrino Fog. SF6 is potentially ideal for this since it provides a high fluorine content, enhancing sensitivity to spin-dependent interactions and, as a Neg… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2405.17967v1-abstract-full').style.display = 'inline'; document.getElementById('2405.17967v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2405.17967v1-abstract-full" style="display: none;"> The CYGNO collaboration is developing next generation directional Dark Matter (DM) detection experiments, using gaseous Time Projection Chambers (TPCs), as a robust method for identifying Weakly Interacting Massive Particles (WIMPs) below the Neutrino Fog. SF6 is potentially ideal for this since it provides a high fluorine content, enhancing sensitivity to spin-dependent interactions and, as a Negative Ion Drift (NID) gas, reduces charge diffusion leading to improved positional resolution. CF4, although not a NID gas, has also been identified as a favourable gas target as it provides a scintillation signal which can be used for a complimentary light/charge readout approach. These gases can operate at low pressures to elongate Nuclear Recoil (NR) tracks and facilitate directional measurements. In principle, He could be added to low pressure SF6/CF4 without significant detriment to the length of 16S, 12C, and 19F recoils. This would improve the target mass, sensitivity to lower WIMP masses, and offer the possibility of atmospheric operation; potentially reducing the cost of a containment vessel. In this article, we present gas gain and energy resolution measurements, taken with a Multi-Mesh Thick Gaseous Electron Multiplier (MMThGEM), in low pressure SF6 and CF4:SF6 mixtures following the addition of He. We find that the CF4:SF6:He mixtures tested were able to produce gas gains on the order of 10^4 up to a total pressure of 100 Torr. These results demonstrate an order of magnitude improvement in charge amplification in NID gas mixtures with a He component. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2405.17967v1-abstract-full').style.display = 'none'; document.getElementById('2405.17967v1-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 May, 2024; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> May 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">Corresponding Author: A.G. McLean</span> </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2306.16856">arXiv:2306.16856</a> <span> [<a href="https://arxiv.org/pdf/2306.16856">pdf</a>, <a href="https://arxiv.org/ps/2306.16856">ps</a>, <a href="https://arxiv.org/format/2306.16856">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.2023.168207">10.1016/j.nima.2023.168207 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> LIME -- a gas TPC prototype for directional Dark Matter search for the CYGNO experiment </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Amaro%2C+F+D">Fernando Domingues Amaro</a>, <a href="/search/physics?searchtype=author&query=Baracchini%2C+E">Elisabetta Baracchini</a>, <a href="/search/physics?searchtype=author&query=Benussi%2C+L">Luigi Benussi</a>, <a href="/search/physics?searchtype=author&query=Bianco%2C+S">Stefano Bianco</a>, <a href="/search/physics?searchtype=author&query=Capoccia%2C+C">Cesidio Capoccia</a>, <a href="/search/physics?searchtype=author&query=Caponero%2C+M">Michele Caponero</a>, <a href="/search/physics?searchtype=author&query=Cardoso%2C+D+S">Danilo Santos Cardoso</a>, <a href="/search/physics?searchtype=author&query=Cavoto%2C+G">Gianluca Cavoto</a>, <a href="/search/physics?searchtype=author&query=Cortez%2C+A">Andr茅 Cortez</a>, <a href="/search/physics?searchtype=author&query=Costa%2C+I+A">Igor Abritta Costa</a>, <a href="/search/physics?searchtype=author&query=Dan%C3%A9%2C+E">Emiliano Dan茅</a>, <a href="/search/physics?searchtype=author&query=Dho%2C+G">Giorgio Dho</a>, <a href="/search/physics?searchtype=author&query=Di+Giambattista%2C+F">Flaminia Di Giambattista</a>, <a href="/search/physics?searchtype=author&query=Di+Marco%2C+E">Emanuele Di Marco</a>, <a href="/search/physics?searchtype=author&query=D%27Imperio%2C+G">Giulia D'Imperio</a>, <a href="/search/physics?searchtype=author&query=Iacoangeli%2C+F">Francesco Iacoangeli</a>, <a href="/search/physics?searchtype=author&query=Junior%2C+H+P+L">Herman Pessoa Lima Junior</a>, <a href="/search/physics?searchtype=author&query=Lopes%2C+G+S+P">Guilherme Sebastiao Pinheiro Lopes</a>, <a href="/search/physics?searchtype=author&query=Maccarrone%2C+G">Giovanni Maccarrone</a>, <a href="/search/physics?searchtype=author&query=Mano%2C+R+D+P">Rui Daniel Passos Mano</a>, <a href="/search/physics?searchtype=author&query=Gregorio%2C+R+R+M">Robert Renz Marcelo Gregorio</a>, <a href="/search/physics?searchtype=author&query=Marques%2C+D+J+G">David Jos茅 Gaspar Marques</a>, <a href="/search/physics?searchtype=author&query=Mazzitelli%2C+G">Giovanni Mazzitelli</a>, <a href="/search/physics?searchtype=author&query=McLean%2C+A+G">Alasdair Gregor McLean</a>, <a href="/search/physics?searchtype=author&query=Messina%2C+A">Andrea Messina</a> , et al. (22 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="2306.16856v1-abstract-short" style="display: inline;"> The CYGNO experiment aims at the development of a large gaseous TPC with GEM-based amplification and an optical readout by means of PMTs and scientific CMOS cameras for 3D tracking down to O(keV) energies, for the directional detection of rare events such as low mass Dark Matter and solar neutrino interactions. The largest prototype built so far towards the realisation of the CYGNO experiment demo… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2306.16856v1-abstract-full').style.display = 'inline'; document.getElementById('2306.16856v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2306.16856v1-abstract-full" style="display: none;"> The CYGNO experiment aims at the development of a large gaseous TPC with GEM-based amplification and an optical readout by means of PMTs and scientific CMOS cameras for 3D tracking down to O(keV) energies, for the directional detection of rare events such as low mass Dark Matter and solar neutrino interactions. The largest prototype built so far towards the realisation of the CYGNO experiment demonstrator is the 50 L active volume LIME, with 4 PMTs and a single sCMOS imaging a 33$\times$33 cm\textsuperscript{2} area for 50 cm drift, that has been installed in underground Laboratori Nazionali del Gran Sasso in February 2022. We will illustrate LIME performances as evaluated overground in Laboratori Nazionali di Frascati by means of radioactive X-ray sources, and in particular the detector stability, energy response and energy resolution. We will discuss the MC simulation developed to reproduce the detector response and show the comparison with actual data. We will furthermore examine the background simulation worked out for LIME underground data taking and illustrate the foreseen expected measurement and results in terms of natural and materials intrinsic radioactivity characterisation and measurement of the LNGS underground natural neutron flux. The results that will be obtained by underground LIME installation will be paramount in the optimisation of the CYGNO demonstrator, since this is foreseen to be composed by multiple modules with the same LIME dimensions and characteristics. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2306.16856v1-abstract-full').style.display = 'none'; document.getElementById('2306.16856v1-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 June, 2023; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> June 2023. </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2306.04568">arXiv:2306.04568</a> <span> [<a href="https://arxiv.org/pdf/2306.04568">pdf</a>, <a href="https://arxiv.org/format/2306.04568">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.2023.168325">10.1016/j.nima.2023.168325 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> The CYGNO experiment, a directional detector for direct Dark Matter searches </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Amaro%2C+F+D">F. D. Amaro</a>, <a href="/search/physics?searchtype=author&query=Baracchini%2C+E">E. Baracchini</a>, <a href="/search/physics?searchtype=author&query=Benussi%2C+L">L. Benussi</a>, <a href="/search/physics?searchtype=author&query=Bianco%2C+S">S. Bianco</a>, <a href="/search/physics?searchtype=author&query=Capoccia%2C+C">C. Capoccia</a>, <a href="/search/physics?searchtype=author&query=Caponero%2C+M">M. Caponero</a>, <a href="/search/physics?searchtype=author&query=Cardoso%2C+D+S">D. S. Cardoso</a>, <a href="/search/physics?searchtype=author&query=Cavoto%2C+G">G. Cavoto</a>, <a href="/search/physics?searchtype=author&query=Cortez%2C+A">A. Cortez</a>, <a href="/search/physics?searchtype=author&query=Costa%2C+I+A">I. A. Costa</a>, <a href="/search/physics?searchtype=author&query=Dan%C3%A9%2C+E">E. Dan茅</a>, <a href="/search/physics?searchtype=author&query=Dho%2C+G">G. Dho</a>, <a href="/search/physics?searchtype=author&query=Di+Giambattista%2C+F">F. Di Giambattista</a>, <a href="/search/physics?searchtype=author&query=Di+Marco%2C+E">E. Di Marco</a>, <a href="/search/physics?searchtype=author&query=D%27Imperio%2C+G">G. D'Imperio</a>, <a href="/search/physics?searchtype=author&query=Iacoangeli%2C+F">F. Iacoangeli</a>, <a href="/search/physics?searchtype=author&query=J%C3%B9nior%2C+H+P+L">H. P. L. J霉nior</a>, <a href="/search/physics?searchtype=author&query=Lopes%2C+G+S+P">G. S. P. Lopes</a>, <a href="/search/physics?searchtype=author&query=Maccarrone%2C+G">G. Maccarrone</a>, <a href="/search/physics?searchtype=author&query=Mano%2C+R+D+P">R. D. P. Mano</a>, <a href="/search/physics?searchtype=author&query=Gregorio%2C+R+R+M">R. R. M. Gregorio</a>, <a href="/search/physics?searchtype=author&query=Marques%2C+D+J+G">D. J. G. Marques</a>, <a href="/search/physics?searchtype=author&query=Mazzitelli%2C+G">G. Mazzitelli</a>, <a href="/search/physics?searchtype=author&query=McLean%2C+A+G">A. G. McLean</a>, <a href="/search/physics?searchtype=author&query=Messina%2C+A">A. Messina</a> , et al. (22 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="2306.04568v1-abstract-short" style="display: inline;"> The CYGNO project aims at the development of a high precision optical readout gaseous Tima Projection Chamber (TPC) for directional dark matter (DM) searches, to be hosted at Laboratori Nazionali del Gran Sasso (LNGS). CYGNO employs a He:CF$_4$ gas mixture at atmospheric pressure with a Gas Electron Multiplier (GEM) based amplification structure coupled to an optical readout comprised of sCMOS cam… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2306.04568v1-abstract-full').style.display = 'inline'; document.getElementById('2306.04568v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2306.04568v1-abstract-full" style="display: none;"> The CYGNO project aims at the development of a high precision optical readout gaseous Tima Projection Chamber (TPC) for directional dark matter (DM) searches, to be hosted at Laboratori Nazionali del Gran Sasso (LNGS). CYGNO employs a He:CF$_4$ gas mixture at atmospheric pressure with a Gas Electron Multiplier (GEM) based amplification structure coupled to an optical readout comprised of sCMOS cameras and photomultiplier tubes (PMTs). This experimental setup allows to achieve 3D tracking and background rejection down to O(1) keV energy, to boost sensitivity to low WIMP masses. The characteristics of the optical readout approach in terms of the light yield will be illustrated along with the particle identification properties. The project timeline foresees, in the next 2-3 years, the realisation and installation of a 0.4 m$^3$ TPC in the underground laboratories at LNGS to act as a demonstrator. Finally, the studies of the expected DM sensitivities of the CYGNO demonstrator will be presented. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2306.04568v1-abstract-full').style.display = 'none'; document.getElementById('2306.04568v1-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 June, 2023; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> June 2023. </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2301.12948">arXiv:2301.12948</a> <span> [<a href="https://arxiv.org/pdf/2301.12948">pdf</a>, <a href="https://arxiv.org/format/2301.12948">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Physics Education">physics.ed-ph</span> </div> </div> <p class="title is-5 mathjax"> Measurement of the cosmic ray flux by an ArduSiPM-based muon telescope in the framework of the Lab2Go project </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Agostini%2C+V">V. Agostini</a>, <a href="/search/physics?searchtype=author&query=Arcese%2C+B">B. Arcese</a>, <a href="/search/physics?searchtype=author&query=Ascani%2C+N">N. Ascani</a>, <a href="/search/physics?searchtype=author&query=Astone%2C+P">P. Astone</a>, <a href="/search/physics?searchtype=author&query=Bocci%2C+V">V. Bocci</a>, <a href="/search/physics?searchtype=author&query=Caperna%2C+S">S. Caperna</a>, <a href="/search/physics?searchtype=author&query=Casaburo%2C+F">F. Casaburo</a>, <a href="/search/physics?searchtype=author&query=Cerica%2C+A">A. Cerica</a>, <a href="/search/physics?searchtype=author&query=D%27Auria%2C+C">C. D'Auria</a>, <a href="/search/physics?searchtype=author&query=De+Bonis%2C+G">G. De Bonis</a>, <a href="/search/physics?searchtype=author&query=Deda%2C+D">D. Deda</a>, <a href="/search/physics?searchtype=author&query=Di+Mauro%2C+F">F. Di Mauro</a>, <a href="/search/physics?searchtype=author&query=Di+Vico%2C+A">A. Di Vico</a>, <a href="/search/physics?searchtype=author&query=Faccini%2C+R">R. Faccini</a>, <a href="/search/physics?searchtype=author&query=Frasca%2C+L">L. Frasca</a>, <a href="/search/physics?searchtype=author&query=Galuppi%2C+G">G. Galuppi</a>, <a href="/search/physics?searchtype=author&query=Giovannetti%2C+G">G. Giovannetti</a>, <a href="/search/physics?searchtype=author&query=Iacoangeli%2C+F">F. Iacoangeli</a>, <a href="/search/physics?searchtype=author&query=Ludovici%2C+G">G. Ludovici</a>, <a href="/search/physics?searchtype=author&query=Martone%2C+L">L. Martone</a>, <a href="/search/physics?searchtype=author&query=Marucci%2C+B">B. Marucci</a>, <a href="/search/physics?searchtype=author&query=Mizzoni%2C+L">L. Mizzoni</a>, <a href="/search/physics?searchtype=author&query=Moriconi%2C+A">A. Moriconi</a>, <a href="/search/physics?searchtype=author&query=Organtini%2C+G">G. Organtini</a>, <a href="/search/physics?searchtype=author&query=Piacentini%2C+F">F. Piacentini</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="2301.12948v2-abstract-short" style="display: inline;"> Whitin Istituto Nazionale di Fisica Nucleare (INFN) outreach activities, the Lab2Go project is of great significance. Its goal is involving high school teachers and students in several laboratory activities, aiming at increasing the weight of experimental contents in teaching and learning. In this article we present the measurement, carried out in the framework of the Lab2Go project, of the cosmic… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2301.12948v2-abstract-full').style.display = 'inline'; document.getElementById('2301.12948v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2301.12948v2-abstract-full" style="display: none;"> Whitin Istituto Nazionale di Fisica Nucleare (INFN) outreach activities, the Lab2Go project is of great significance. Its goal is involving high school teachers and students in several laboratory activities, aiming at increasing the weight of experimental contents in teaching and learning. In this article we present the measurement, carried out in the framework of the Lab2Go project, of the cosmic muon flux made by an ArduSiPM-based muon telescope. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2301.12948v2-abstract-full').style.display = 'none'; document.getElementById('2301.12948v2-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 February, 2023; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 30 January, 2023; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> January 2023. </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2202.05480">arXiv:2202.05480</a> <span> [<a href="https://arxiv.org/pdf/2202.05480">pdf</a>, <a href="https://arxiv.org/format/2202.05480">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/10.3390/instruments6010006">10.3390/instruments6010006 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> The CYGNO Experiment </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Amaro%2C+F+D">Fernando Domingues Amaro</a>, <a href="/search/physics?searchtype=author&query=Baracchini%2C+E">Elisabetta Baracchini</a>, <a href="/search/physics?searchtype=author&query=Benussi%2C+L">Luigi Benussi</a>, <a href="/search/physics?searchtype=author&query=Bianco%2C+S">Stefano Bianco</a>, <a href="/search/physics?searchtype=author&query=Capoccia%2C+C">Cesidio Capoccia</a>, <a href="/search/physics?searchtype=author&query=Caponero%2C+M">Michele Caponero</a>, <a href="/search/physics?searchtype=author&query=Cardoso%2C+D+S">Danilo Santos Cardoso</a>, <a href="/search/physics?searchtype=author&query=Cavoto%2C+G">Gianluca Cavoto</a>, <a href="/search/physics?searchtype=author&query=Cortez%2C+A">Andr茅 Cortez</a>, <a href="/search/physics?searchtype=author&query=Costa%2C+I+A">Igor Abritta Costa</a>, <a href="/search/physics?searchtype=author&query=Roque%2C+R+J+d+C">Rita Joanna da Cruz Roque</a>, <a href="/search/physics?searchtype=author&query=Dan%C3%A9%2C+E">Emiliano Dan茅</a>, <a href="/search/physics?searchtype=author&query=Dho%2C+G">Giorgio Dho</a>, <a href="/search/physics?searchtype=author&query=Di+Giambattista%2C+F">Flaminia Di Giambattista</a>, <a href="/search/physics?searchtype=author&query=Di+Marco%2C+E">Emanuele Di Marco</a>, <a href="/search/physics?searchtype=author&query=di+Cortona%2C+G+G">Giovanni Grilli di Cortona</a>, <a href="/search/physics?searchtype=author&query=D%27Imperio%2C+G">Giulia D'Imperio</a>, <a href="/search/physics?searchtype=author&query=Iacoangeli%2C+F">Francesco Iacoangeli</a>, <a href="/search/physics?searchtype=author&query=J%C3%BAnior%2C+H+P+L">Herman Pessoa Lima J煤nior</a>, <a href="/search/physics?searchtype=author&query=Lopes%2C+G+S+P">Guilherme Sebastiao Pinheiro Lopes</a>, <a href="/search/physics?searchtype=author&query=J%C3%BAnior%2C+A+d+S+L">Amaro da Silva Lopes J煤nior</a>, <a href="/search/physics?searchtype=author&query=Maccarrone%2C+G">Giovanni Maccarrone</a>, <a href="/search/physics?searchtype=author&query=Mano%2C+R+D+P">Rui Daniel Passos Mano</a>, <a href="/search/physics?searchtype=author&query=Marafini%2C+M">Michela Marafini</a>, <a href="/search/physics?searchtype=author&query=Gregorio%2C+R+R+M">Robert Renz Marcelo Gregorio</a> , et al. (25 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="2202.05480v1-abstract-short" style="display: inline;"> The search for a novel technology able to detect and reconstruct nuclear and electron recoil events with the energy of a few keV has become more and more important now that large regions of high-mass dark matter (DM) candidates have been excluded. Moreover, a detector sensitive to incoming particle direction will be crucial in the case of DM discovery to open the possibility of studying its proper… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2202.05480v1-abstract-full').style.display = 'inline'; document.getElementById('2202.05480v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2202.05480v1-abstract-full" style="display: none;"> The search for a novel technology able to detect and reconstruct nuclear and electron recoil events with the energy of a few keV has become more and more important now that large regions of high-mass dark matter (DM) candidates have been excluded. Moreover, a detector sensitive to incoming particle direction will be crucial in the case of DM discovery to open the possibility of studying its properties. Gaseous time projection chambers (TPC) with optical readout are very promising detectors combining the detailed event information provided by the TPC technique with the high sensitivity and granularity of latest-generation scientific light sensors. The CYGNO experiment (a CYGNus module with Optical readout) aims to exploit the optical readout approach of multiple-GEM structures in large volume TPCs for the study of rare events as interactions of low-mass DM or solar neutrinos. The combined use of high-granularity sCMOS cameras and fast light sensors allows the reconstruction of the 3D direction of the tracks, offering good energy resolution and very high sensitivity in the few keV energy range, together with a very good particle identification useful for distinguishing nuclear recoils from electronic recoils. This experiment is part of the CYGNUS proto-collaboration, which aims at constructing a network of underground observatories for directional DM search. A one cubic meter demonstrator is expected to be built in 2022/23 aiming at a larger scale apparatus (30 m$^3$--100 m$^3$) at a later stage. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2202.05480v1-abstract-full').style.display = 'none'; document.getElementById('2202.05480v1-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 February, 2022; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> February 2022. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> published on Instruments 2022, 6(1), 6 </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2201.09655">arXiv:2201.09655</a> <span> [<a href="https://arxiv.org/pdf/2201.09655">pdf</a>, <a href="https://arxiv.org/ps/2201.09655">ps</a>, <a href="https://arxiv.org/format/2201.09655">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Accelerator Physics">physics.acc-ph</span> </div> </div> <p class="title is-5 mathjax"> Multiple scattering of channeled and non-channeled positively charged particles in bent monocrystalline silicon </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Scandale%2C+W">W. Scandale</a>, <a href="/search/physics?searchtype=author&query=Arduini%2C+G">G. Arduini</a>, <a href="/search/physics?searchtype=author&query=Cerutti%2C+F">F. Cerutti</a>, <a href="/search/physics?searchtype=author&query=Esposito%2C+L+S">L. S. Esposito</a>, <a href="/search/physics?searchtype=author&query=Garattini%2C+M">M. Garattini</a>, <a href="/search/physics?searchtype=author&query=Gilardoni%2C+S">S. Gilardoni</a>, <a href="/search/physics?searchtype=author&query=Losito%2C+R">R. Losito</a>, <a href="/search/physics?searchtype=author&query=Masi%2C+A">A. Masi</a>, <a href="/search/physics?searchtype=author&query=Mirarchi%2C+D">D. Mirarchi</a>, <a href="/search/physics?searchtype=author&query=Montesano%2C+S">S. Montesano</a>, <a href="/search/physics?searchtype=author&query=Redaelli%2C+S">S. Redaelli</a>, <a href="/search/physics?searchtype=author&query=Rossi%2C+R">R. Rossi</a>, <a href="/search/physics?searchtype=author&query=Smirnov%2C+G">G. Smirnov</a>, <a href="/search/physics?searchtype=author&query=Burmistrov%2C+L">L. Burmistrov</a>, <a href="/search/physics?searchtype=author&query=Dubos%2C+S">S. Dubos</a>, <a href="/search/physics?searchtype=author&query=Puill%2C+V">V. Puill</a>, <a href="/search/physics?searchtype=author&query=Stocchi%2C+A">A. Stocchi</a>, <a href="/search/physics?searchtype=author&query=Bandiera%2C+L">L. Bandiera</a>, <a href="/search/physics?searchtype=author&query=Guidi%2C+V">V. Guidi</a>, <a href="/search/physics?searchtype=author&query=Mazzolari%2C+A">A. Mazzolari</a>, <a href="/search/physics?searchtype=author&query=Romagnoni%2C+M">M. Romagnoni</a>, <a href="/search/physics?searchtype=author&query=Murtas%2C+F">F. Murtas</a>, <a href="/search/physics?searchtype=author&query=Addesa%2C+F">F. Addesa</a>, <a href="/search/physics?searchtype=author&query=Cavoto%2C+G">G. Cavoto</a>, <a href="/search/physics?searchtype=author&query=Iacoangeli%2C+F">F. Iacoangeli</a> , et al. (17 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="2201.09655v2-abstract-short" style="display: inline;"> We present the results of an experimental study of multiple scattering of positively charged high energy particles in bent samples of monocrystalline silicon. This work confirms the recently discovered effect of a strong reduction in the rms multiple scattering angle of particles channeled in the silicon (111) plane. The effect is observed in the plane orthogonal to the bending plane. We show in d… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2201.09655v2-abstract-full').style.display = 'inline'; document.getElementById('2201.09655v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2201.09655v2-abstract-full" style="display: none;"> We present the results of an experimental study of multiple scattering of positively charged high energy particles in bent samples of monocrystalline silicon. This work confirms the recently discovered effect of a strong reduction in the rms multiple scattering angle of particles channeled in the silicon (111) plane. The effect is observed in the plane orthogonal to the bending plane. We show in detail the influence of angular constraints on the magnitude of the effect. Comparison of the multiple scattering process at different energies indicates a violation of the law of inverse proportionality of the rms angle of channeled particles with energy. By increasing the statistics, we have improved the results of multiple scattering measurements for particles moving, but not channeled, in silicon crystals. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2201.09655v2-abstract-full').style.display = 'none'; document.getElementById('2201.09655v2-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, 2022; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 24 January, 2022; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> January 2022. </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">arXiv admin note: text overlap with arXiv:1910.00250 minor fixes</span> </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2105.12624">arXiv:2105.12624</a> <span> [<a href="https://arxiv.org/pdf/2105.12624">pdf</a>, <a href="https://arxiv.org/format/2105.12624">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.2021.166129">10.1016/j.nima.2021.166129 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Muon detection in electron-positron annihilation for muon collider studies </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Amapane%2C+N">N. Amapane</a>, <a href="/search/physics?searchtype=author&query=Antonelli%2C+M">M. Antonelli</a>, <a href="/search/physics?searchtype=author&query=Anulli%2C+F">F. Anulli</a>, <a href="/search/physics?searchtype=author&query=Ballerini%2C+G">G. Ballerini</a>, <a href="/search/physics?searchtype=author&query=Bandiera%2C+L">L. Bandiera</a>, <a href="/search/physics?searchtype=author&query=Bartosik%2C+N">N. Bartosik</a>, <a href="/search/physics?searchtype=author&query=Bauce%2C+M">M. Bauce</a>, <a href="/search/physics?searchtype=author&query=Bertolin%2C+A">A. Bertolin</a>, <a href="/search/physics?searchtype=author&query=Biino%2C+C">C. Biino</a>, <a href="/search/physics?searchtype=author&query=Garcia%2C+O+R+B">O. R. Blanco- Garcia</a>, <a href="/search/physics?searchtype=author&query=Boscolo%2C+M">M. Boscolo</a>, <a href="/search/physics?searchtype=author&query=Brizzolari%2C+C">C. Brizzolari</a>, <a href="/search/physics?searchtype=author&query=Cappati%2C+A">A. Cappati</a>, <a href="/search/physics?searchtype=author&query=Casaburo%2C+F">F. Casaburo</a>, <a href="/search/physics?searchtype=author&query=Casarsa%2C+M">M. Casarsa</a>, <a href="/search/physics?searchtype=author&query=Cavoto%2C+G">G. Cavoto</a>, <a href="/search/physics?searchtype=author&query=Cesarini%2C+G">G. Cesarini</a>, <a href="/search/physics?searchtype=author&query=Collamati%2C+F">F. Collamati</a>, <a href="/search/physics?searchtype=author&query=Cotto%2C+G">G. Cotto</a>, <a href="/search/physics?searchtype=author&query=Curatolo%2C+C">C. Curatolo</a>, <a href="/search/physics?searchtype=author&query=Di+Nardo%2C+R">R. Di Nardo</a>, <a href="/search/physics?searchtype=author&query=Gonella%2C+F">F. Gonella</a>, <a href="/search/physics?searchtype=author&query=Hoh%2C+S">S. Hoh</a>, <a href="/search/physics?searchtype=author&query=Iafrati%2C+M">M. Iafrati</a>, <a href="/search/physics?searchtype=author&query=Iacoangeli%2C+F">F. Iacoangeli</a> , et al. (21 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="2105.12624v4-abstract-short" style="display: inline;"> The investigation of the energy frontier in physics requires novel concepts for future colliders. The idea of a muon collider is very appealing since it would allow to study particle collisions at up to tens of TeV energy, while offering a cleaner experimental environment with respect to hadronic colliders. One key element in the muon collider design is the low-emittance muon production. Recently,… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2105.12624v4-abstract-full').style.display = 'inline'; document.getElementById('2105.12624v4-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2105.12624v4-abstract-full" style="display: none;"> The investigation of the energy frontier in physics requires novel concepts for future colliders. The idea of a muon collider is very appealing since it would allow to study particle collisions at up to tens of TeV energy, while offering a cleaner experimental environment with respect to hadronic colliders. One key element in the muon collider design is the low-emittance muon production. Recently,the Low EMittance Muon Accelerator (LEMMA) collaboration has explored the muon pair production close to its kinematic threshold by annihilating 45 GeV positrons with electrons in a low Z material target. In this configuration, muons are emerging from the target with a naturally low-emittance. In this paper we describe the performance of a system, to study this production mechanism, that consists in several segmented absorbers with alternating active layers composed of fast Cherenkov detectors together with a muon identification technique based on this detector. Passive layers were made of tungsten. We collected data corresponding to muon and electron beams produced at the H2 line in the North Area of the European Organization for Nuclear Research (CERN) in September 2018. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2105.12624v4-abstract-full').style.display = 'none'; document.getElementById('2105.12624v4-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 October, 2021; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 26 May, 2021; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> May 2021. </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2007.12627">arXiv:2007.12627</a> <span> [<a href="https://arxiv.org/pdf/2007.12627">pdf</a>, <a href="https://arxiv.org/format/2007.12627">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/10.1088/1748-0221/15/07/C07036">10.1088/1748-0221/15/07/C07036 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> CYGNO: a gaseous TPC with optical readout for dark matter directional search </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Baracchini%2C+E">E. Baracchini</a>, <a href="/search/physics?searchtype=author&query=Benussi%2C+L">L. Benussi</a>, <a href="/search/physics?searchtype=author&query=Bianco%2C+S">S. Bianco</a>, <a href="/search/physics?searchtype=author&query=Capoccia%2C+C">C. Capoccia</a>, <a href="/search/physics?searchtype=author&query=Caponero%2C+M">M. Caponero</a>, <a href="/search/physics?searchtype=author&query=Cavoto%2C+G">G. Cavoto</a>, <a href="/search/physics?searchtype=author&query=Cortez%2C+A">A. Cortez</a>, <a href="/search/physics?searchtype=author&query=Costa%2C+I+A">I. A. Costa</a>, <a href="/search/physics?searchtype=author&query=Di+Marco%2C+E">E. Di Marco</a>, <a href="/search/physics?searchtype=author&query=D%27Imperio%2C+G">G. D'Imperio</a>, <a href="/search/physics?searchtype=author&query=Dho%2C+G">G. Dho</a>, <a href="/search/physics?searchtype=author&query=Iacoangeli%2C+F">F. Iacoangeli</a>, <a href="/search/physics?searchtype=author&query=Maccarrone%2C+G">G. Maccarrone</a>, <a href="/search/physics?searchtype=author&query=Marafini%2C+M">M. Marafini</a>, <a href="/search/physics?searchtype=author&query=Mazzitelli%2C+G">G. Mazzitelli</a>, <a href="/search/physics?searchtype=author&query=Messina%2C+A">A. Messina</a>, <a href="/search/physics?searchtype=author&query=Nobrega%2C+R+A">R. A. Nobrega</a>, <a href="/search/physics?searchtype=author&query=Orlandi%2C+A">A. Orlandi</a>, <a href="/search/physics?searchtype=author&query=Paoletti%2C+E">E. Paoletti</a>, <a href="/search/physics?searchtype=author&query=Passamonti%2C+L">L. Passamonti</a>, <a href="/search/physics?searchtype=author&query=Petrucci%2C+F">F. Petrucci</a>, <a href="/search/physics?searchtype=author&query=Piccolo%2C+D">D. Piccolo</a>, <a href="/search/physics?searchtype=author&query=Pierluigi%2C+D">D. Pierluigi</a>, <a href="/search/physics?searchtype=author&query=Pinci%2C+D">D. Pinci</a>, <a href="/search/physics?searchtype=author&query=Renga%2C+F">F. Renga</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="2007.12627v1-abstract-short" style="display: inline;"> The CYGNO project has the goal to use a gaseous TPC with optical readout to detect dark matter and solar neutrinos with low energy threshold and directionality. The CYGNO demonstrator will consist of 1 m 3 volume filled with He:CF 4 gas mixture at atmospheric pressure. Optical readout with high granularity CMOS sensors, combined with fast light detectors, will provide a detailed reconstruction of… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2007.12627v1-abstract-full').style.display = 'inline'; document.getElementById('2007.12627v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2007.12627v1-abstract-full" style="display: none;"> The CYGNO project has the goal to use a gaseous TPC with optical readout to detect dark matter and solar neutrinos with low energy threshold and directionality. The CYGNO demonstrator will consist of 1 m 3 volume filled with He:CF 4 gas mixture at atmospheric pressure. Optical readout with high granularity CMOS sensors, combined with fast light detectors, will provide a detailed reconstruction of the event topology. This will allow to discriminate the nuclear recoil signal from the background, mainly represented by low energy electron recoils induced by radioactivity. Thanks to the high reconstruction efficiency, CYGNO will be sensitive to low mass dark matter, and will have the potential to overcome the neutrino floor, that ultimately limits non-directional dark matter searches. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2007.12627v1-abstract-full').style.display = 'none'; document.getElementById('2007.12627v1-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> 24 July, 2020; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> July 2020. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Journal of Instrumentation, Volume 15, July 2020 </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2007.12508">arXiv:2007.12508</a> <span> [<a href="https://arxiv.org/pdf/2007.12508">pdf</a>, <a href="https://arxiv.org/format/2007.12508">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/10.1088/1361-6501/abbd12">10.1088/1361-6501/abbd12 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Identification of low energy nuclear recoils in a gas TPC with optical readout </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Baracchini%2C+E">Elisabetta Baracchini</a>, <a href="/search/physics?searchtype=author&query=Benussi%2C+L">Luigi Benussi</a>, <a href="/search/physics?searchtype=author&query=Bianco%2C+S">Stefano Bianco</a>, <a href="/search/physics?searchtype=author&query=Capoccia%2C+C">Cesidio Capoccia</a>, <a href="/search/physics?searchtype=author&query=Caponero%2C+M+A">Michele Arturo Caponero</a>, <a href="/search/physics?searchtype=author&query=Cavoto%2C+G">Gianluca Cavoto</a>, <a href="/search/physics?searchtype=author&query=Cortez%2C+A">Andre Cortez</a>, <a href="/search/physics?searchtype=author&query=Costa%2C+I+A">Igor Abritta Costa</a>, <a href="/search/physics?searchtype=author&query=Di+Marco%2C+E">Emanuele Di Marco</a>, <a href="/search/physics?searchtype=author&query=D%27Imperio%2C+G">Giulia D'Imperio</a>, <a href="/search/physics?searchtype=author&query=Dho%2C+G">Giorgio Dho</a>, <a href="/search/physics?searchtype=author&query=Iacoangeli%2C+F">Fabrizio Iacoangeli</a>, <a href="/search/physics?searchtype=author&query=Maccarrone%2C+G">Giovanni Maccarrone</a>, <a href="/search/physics?searchtype=author&query=Marafini%2C+M">Michela Marafini</a>, <a href="/search/physics?searchtype=author&query=Mazzitelli%2C+G">Giovanni Mazzitelli</a>, <a href="/search/physics?searchtype=author&query=Messina%2C+A">Andrea Messina</a>, <a href="/search/physics?searchtype=author&query=Nobrega%2C+R+A">Rafael Antunes Nobrega</a>, <a href="/search/physics?searchtype=author&query=Orlandi%2C+A">Aldo Orlandi</a>, <a href="/search/physics?searchtype=author&query=Paoletti%2C+E">Emiliano Paoletti</a>, <a href="/search/physics?searchtype=author&query=Passamonti%2C+L">Luciano Passamonti</a>, <a href="/search/physics?searchtype=author&query=Petrucci%2C+F">Fabrizio Petrucci</a>, <a href="/search/physics?searchtype=author&query=Piccolo%2C+D">Davide Piccolo</a>, <a href="/search/physics?searchtype=author&query=Pierluigi%2C+D">Daniele Pierluigi</a>, <a href="/search/physics?searchtype=author&query=Pinci%2C+D">Davide Pinci</a>, <a href="/search/physics?searchtype=author&query=Renga%2C+F">Francesco Renga</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="2007.12508v2-abstract-short" style="display: inline;"> The search for a novel technology able to detect and reconstruct nuclear recoil events in the keV energy range has become more and more important as long as vast regions of high mass WIMP-like Dark Matter candidate have been excluded. Gaseous Time Projection Chambers (TPC) with optical readout are very promising candidate combining the complete event information provided by the TPC technique to th… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2007.12508v2-abstract-full').style.display = 'inline'; document.getElementById('2007.12508v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2007.12508v2-abstract-full" style="display: none;"> The search for a novel technology able to detect and reconstruct nuclear recoil events in the keV energy range has become more and more important as long as vast regions of high mass WIMP-like Dark Matter candidate have been excluded. Gaseous Time Projection Chambers (TPC) with optical readout are very promising candidate combining the complete event information provided by the TPC technique to the high sensitivity and granularity of last generation scientific light sensors. A TPC with an amplification at the anode obtained with Gas Electron Multipliers (GEM) was tested at the Laboratori Nazionali di Frascati. Photons and neutrons from radioactive sources were employed to induce recoiling nuclei and electrons with kinetic energy in the range [1-100] keV. A He-CF4 (60/40) gas mixture was used at atmospheric pressure and the light produced during the multiplication in the GEM channels was acquired by a high position resolution and low noise scientific CMOS camera and a photomultiplier. A multi-stage pattern recognition algorithm based on an advanced clustering technique is presented here. A number of cluster shape observables are used to identify nuclear recoils induced by neutrons originated from a AmBe source against X-ray 55Fe photo-electrons. An efficiency of 18% to detect nuclear recoils with an energy of about 6 keV is reached obtaining at the same time a 96% 55Fe photo-electrons suppression. This makes this optically readout gas TPC a very promising candidate for future investigations of ultra-rare events as directional direct Dark Matter searches. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2007.12508v2-abstract-full').style.display = 'none'; document.getElementById('2007.12508v2-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, 2021; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 24 July, 2020; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> July 2020. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Report number:</span> LEMON-20-001 </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Meas. Sci. and Tech. 2020 </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2007.01763">arXiv:2007.01763</a> <span> [<a href="https://arxiv.org/pdf/2007.01763">pdf</a>, <a href="https://arxiv.org/format/2007.01763">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/10.1088/1748-0221/15/12/T12003">10.1088/1748-0221/15/12/T12003 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> A density-based clustering algorithm for the CYGNO data analysis </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Baracchini%2C+E">E. Baracchini</a>, <a href="/search/physics?searchtype=author&query=Benussi%2C+L">L. Benussi</a>, <a href="/search/physics?searchtype=author&query=Bianco%2C+S">S. Bianco</a>, <a href="/search/physics?searchtype=author&query=Capoccia%2C+C">C. Capoccia</a>, <a href="/search/physics?searchtype=author&query=Caponero%2C+M">M. Caponero</a>, <a href="/search/physics?searchtype=author&query=Cavoto%2C+G">G. Cavoto</a>, <a href="/search/physics?searchtype=author&query=Cortez%2C+A">A. Cortez</a>, <a href="/search/physics?searchtype=author&query=Costa%2C+I+A">I. A. Costa</a>, <a href="/search/physics?searchtype=author&query=Di+Marco%2C+E">E. Di Marco</a>, <a href="/search/physics?searchtype=author&query=D%27Imperio%2C+G">G. D'Imperio</a>, <a href="/search/physics?searchtype=author&query=Dho%2C+G">G. Dho</a>, <a href="/search/physics?searchtype=author&query=Iacoangeli%2C+F">F. Iacoangeli</a>, <a href="/search/physics?searchtype=author&query=Maccarrone%2C+G">G. Maccarrone</a>, <a href="/search/physics?searchtype=author&query=Marafini%2C+M">M. Marafini</a>, <a href="/search/physics?searchtype=author&query=Mazzitelli%2C+G">G. Mazzitelli</a>, <a href="/search/physics?searchtype=author&query=Messina%2C+A">A. Messina</a>, <a href="/search/physics?searchtype=author&query=Nobrega%2C+R+A">R. A. Nobrega</a>, <a href="/search/physics?searchtype=author&query=Orlandi%2C+A">A. Orlandi</a>, <a href="/search/physics?searchtype=author&query=Paoletti%2C+E">E. Paoletti</a>, <a href="/search/physics?searchtype=author&query=Passamonti%2C+L">L. Passamonti</a>, <a href="/search/physics?searchtype=author&query=Petrucci%2C+F">F. Petrucci</a>, <a href="/search/physics?searchtype=author&query=Piccolo%2C+D">D. Piccolo</a>, <a href="/search/physics?searchtype=author&query=Pierluigi%2C+D">D. Pierluigi</a>, <a href="/search/physics?searchtype=author&query=Pinci%2C+D">D. Pinci</a>, <a href="/search/physics?searchtype=author&query=Renga%2C+F">F. Renga</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="2007.01763v3-abstract-short" style="display: inline;"> Time Projection Chambers (TPCs) working in combination with Gas Electron Multipliers (GEMs) produce a very sensitive detector capable of observing low energy events. This is achieved by capturing photons generated during the GEM electron multiplication process by means of a high-resolution camera. The CYGNO experiment has recently developed a TPC Triple GEM detector coupled to a low noise and high… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2007.01763v3-abstract-full').style.display = 'inline'; document.getElementById('2007.01763v3-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2007.01763v3-abstract-full" style="display: none;"> Time Projection Chambers (TPCs) working in combination with Gas Electron Multipliers (GEMs) produce a very sensitive detector capable of observing low energy events. This is achieved by capturing photons generated during the GEM electron multiplication process by means of a high-resolution camera. The CYGNO experiment has recently developed a TPC Triple GEM detector coupled to a low noise and high spatial resolution CMOS sensor. For the image analysis, an algorithm based on an adapted version of the well-known DBSCAN was implemented, called iDBSCAN. In this paper a description of the iDBSCAN algorithm is given, including test and validation of its parameters, and a comparison with DBSCAN itself and a widely used algorithm known as Nearest Neighbor Clustering (NNC). The results show that the adapted version of DBSCAN is capable of providing full signal detection efficiency and very good energy resolution while improving the detector background rejection. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2007.01763v3-abstract-full').style.display = 'none'; document.getElementById('2007.01763v3-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 September, 2020; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 3 July, 2020; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> July 2020. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> JINST 15 (2020) no.12, T12003 </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2007.00608">arXiv:2007.00608</a> <span> [<a href="https://arxiv.org/pdf/2007.00608">pdf</a>, <a href="https://arxiv.org/format/2007.00608">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/10.1088/1748-0221/15/10/P10001">10.1088/1748-0221/15/10/P10001 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Stability and detection performance of a GEM-based Optical Readout TPC with He/CF$_4$ gas mixtures </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Baracchini%2C+E">E. Baracchini</a>, <a href="/search/physics?searchtype=author&query=Benussi%2C+L">L. Benussi</a>, <a href="/search/physics?searchtype=author&query=Bianco%2C+S">S. Bianco</a>, <a href="/search/physics?searchtype=author&query=Capoccia%2C+C">C. Capoccia</a>, <a href="/search/physics?searchtype=author&query=Caponero%2C+M">M. Caponero</a>, <a href="/search/physics?searchtype=author&query=Cavoto%2C+G">G. Cavoto</a>, <a href="/search/physics?searchtype=author&query=Cortez%2C+A">A. Cortez</a>, <a href="/search/physics?searchtype=author&query=Costa%2C+I+A">I. A. Costa</a>, <a href="/search/physics?searchtype=author&query=Di+Marco%2C+E">E. Di Marco</a>, <a href="/search/physics?searchtype=author&query=D%27Imperio%2C+G">G. D'Imperio</a>, <a href="/search/physics?searchtype=author&query=Dho%2C+G">G. Dho</a>, <a href="/search/physics?searchtype=author&query=Iacoangeli%2C+F">F. Iacoangeli</a>, <a href="/search/physics?searchtype=author&query=Maccarrone%2C+G">G. Maccarrone</a>, <a href="/search/physics?searchtype=author&query=Marafini%2C+M">M. Marafini</a>, <a href="/search/physics?searchtype=author&query=Mazzitelli%2C+G">G. Mazzitelli</a>, <a href="/search/physics?searchtype=author&query=Messina%2C+A">A. Messina</a>, <a href="/search/physics?searchtype=author&query=Nobrega%2C+R+A">R. A. Nobrega</a>, <a href="/search/physics?searchtype=author&query=Orlandi%2C+A">A. Orlandi</a>, <a href="/search/physics?searchtype=author&query=Paoletti%2C+E">E. Paoletti</a>, <a href="/search/physics?searchtype=author&query=Passamonti%2C+L">L. Passamonti</a>, <a href="/search/physics?searchtype=author&query=Petrucci%2C+F">F. Petrucci</a>, <a href="/search/physics?searchtype=author&query=Piccolo%2C+D">D. Piccolo</a>, <a href="/search/physics?searchtype=author&query=Pierluigi%2C+D">D. Pierluigi</a>, <a href="/search/physics?searchtype=author&query=Pinci%2C+D">D. Pinci</a>, <a href="/search/physics?searchtype=author&query=Renga%2C+F">F. Renga</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="2007.00608v3-abstract-short" style="display: inline;"> The performance and long term stability of an optically readout Time Projection Chamber with an electron amplification structure based on three Gas Electron Multipliers was studied. He/CF$_4$ based gas mixtures were used in two different proportions (60/40 and 70/30) in a CYGNO prototype with 7 litres sensitive volume. With electrical configurations providing very similar electron gains, an almost… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2007.00608v3-abstract-full').style.display = 'inline'; document.getElementById('2007.00608v3-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2007.00608v3-abstract-full" style="display: none;"> The performance and long term stability of an optically readout Time Projection Chamber with an electron amplification structure based on three Gas Electron Multipliers was studied. He/CF$_4$ based gas mixtures were used in two different proportions (60/40 and 70/30) in a CYGNO prototype with 7 litres sensitive volume. With electrical configurations providing very similar electron gains, an almost full detection efficiency in the whole detector volume was found with both mixtures, while a light yield about 20\% larger for the 60/40 was found. The electrostatic stability was tested by monitoring voltages and currents during 25 days. The detector worked in very stable and safe condition for the whole period. In the presence of less CF$_4$, a larger probability of unstable events was clearly detected. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2007.00608v3-abstract-full').style.display = 'none'; document.getElementById('2007.00608v3-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 August, 2020; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 1 July, 2020; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> July 2020. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> JINST 15 (2020) no.10, P10001 </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2005.12272">arXiv:2005.12272</a> <span> [<a href="https://arxiv.org/pdf/2005.12272">pdf</a>, <a href="https://arxiv.org/format/2005.12272">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="Applied Physics">physics.app-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.2021.165209">10.1016/j.nima.2021.165209 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Performance of an optically read out time projection chamber with ultra-relativistic electrons </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Antochi%2C+V+C">V. C. Antochi</a>, <a href="/search/physics?searchtype=author&query=Baracchini%2C+E">E. Baracchini</a>, <a href="/search/physics?searchtype=author&query=Benussi%2C+L">L. Benussi</a>, <a href="/search/physics?searchtype=author&query=Bianco%2C+S">S. Bianco</a>, <a href="/search/physics?searchtype=author&query=Capoccia%2C+C">C. Capoccia</a>, <a href="/search/physics?searchtype=author&query=Caponero%2C+M">M. Caponero</a>, <a href="/search/physics?searchtype=author&query=Cavoto%2C+G">G. Cavoto</a>, <a href="/search/physics?searchtype=author&query=Cortez%2C+A">A. Cortez</a>, <a href="/search/physics?searchtype=author&query=Costa%2C+I+A">I. A. Costa</a>, <a href="/search/physics?searchtype=author&query=Di+Marco%2C+E">E. Di Marco</a>, <a href="/search/physics?searchtype=author&query=D%27Imperio%2C+G">G. D'Imperio</a>, <a href="/search/physics?searchtype=author&query=Dho%2C+G">G. Dho</a>, <a href="/search/physics?searchtype=author&query=Iacoangeli%2C+F">F. Iacoangeli</a>, <a href="/search/physics?searchtype=author&query=Maccarrone%2C+G">G Maccarrone</a>, <a href="/search/physics?searchtype=author&query=Marafini%2C+M">M. Marafini</a>, <a href="/search/physics?searchtype=author&query=Mazzitelli%2C+G">G. Mazzitelli</a>, <a href="/search/physics?searchtype=author&query=Messina%2C+A">A. Messina</a>, <a href="/search/physics?searchtype=author&query=N%27obrega%2C+R+A">R. A. N'obrega</a>, <a href="/search/physics?searchtype=author&query=Orlandi%2C+A">A. Orlandi</a>, <a href="/search/physics?searchtype=author&query=Paoletti%2C+E">E. Paoletti</a>, <a href="/search/physics?searchtype=author&query=Passamonti%2C+L">L. Passamonti</a>, <a href="/search/physics?searchtype=author&query=Petrucci%2C+F">F. Petrucci</a>, <a href="/search/physics?searchtype=author&query=Piccolo%2C+D">D. Piccolo</a>, <a href="/search/physics?searchtype=author&query=Pierluigi%2C+D">D. Pierluigi</a>, <a href="/search/physics?searchtype=author&query=Pinci%2C+D">D. Pinci</a> , et al. (6 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="2005.12272v3-abstract-short" style="display: inline;"> The Time Projection Chamber (TPC) is an ideal candidate to finely study the charged particle ionization in a gaseous medium. Large volumes TPCs can be read out with a suitable number of channels offering a complete 3D reconstruction of an ultra-relativistic charged particle track, that is the sequence of its energy releases in the TPC gas volume. Moreover, He-based TPCs are very promising to study… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2005.12272v3-abstract-full').style.display = 'inline'; document.getElementById('2005.12272v3-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2005.12272v3-abstract-full" style="display: none;"> The Time Projection Chamber (TPC) is an ideal candidate to finely study the charged particle ionization in a gaseous medium. Large volumes TPCs can be read out with a suitable number of channels offering a complete 3D reconstruction of an ultra-relativistic charged particle track, that is the sequence of its energy releases in the TPC gas volume. Moreover, He-based TPCs are very promising to study keV energy particles as nuclear recoils, opening the possibility for directional searches of Dark Matter (DM) and the study of Solar Neutrinos (SN). In this paper, we report the analysis of the data acquired with a small TPC prototype (named LEMOn) built by the CYGNO collaboration that was exposed to a beam of 450 MeV electrons at the Beam Test Facility of National Laboratories of Frascati. LEMOn is operated with a He-CF4 mixture at atmospheric pressure and is based on a Gas Electron Multipliers amplification stage that produces visible light collected by a sub-millimeter position resolution scientific CMOS camera. This type of readout - in conjunction with a fast light detection - allows a 3D reconstruction of the electrons' tracks. The electrons are leaving a trail of segments of ionizations corresponding to a few keV energy releases each. Their study leads to predict a keV energy threshold and 1-10 mm longitudinal and 0.1-0.3 mm transverse position resolution for nuclear recoils, very promising for the application of optically readout TPC to DM searches and SN measurements. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2005.12272v3-abstract-full').style.display = 'none'; document.getElementById('2005.12272v3-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, 2021; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 25 May, 2020; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> May 2020. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Report number:</span> INFN-20-06/LNF </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, 2021 </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2004.10493">arXiv:2004.10493</a> <span> [<a href="https://arxiv.org/pdf/2004.10493">pdf</a>, <a href="https://arxiv.org/format/2004.10493">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/10.1088/1748-0221/15/08/P08018">10.1088/1748-0221/15/08/P08018 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> First evidence of luminescence in a He/CF$_4$ gas mixture induced by non-ionizing electrons </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Baracchini%2C+E">E. Baracchini</a>, <a href="/search/physics?searchtype=author&query=Benussi%2C+L">L. Benussi</a>, <a href="/search/physics?searchtype=author&query=Bianco%2C+S">S. Bianco</a>, <a href="/search/physics?searchtype=author&query=Capoccia%2C+C">C. Capoccia</a>, <a href="/search/physics?searchtype=author&query=Caponero%2C+M">M. Caponero</a>, <a href="/search/physics?searchtype=author&query=Cavoto%2C+G">G. Cavoto</a>, <a href="/search/physics?searchtype=author&query=Cortez%2C+A">A. Cortez</a>, <a href="/search/physics?searchtype=author&query=Costa%2C+I+A">I. A. Costa</a>, <a href="/search/physics?searchtype=author&query=Di+Marco%2C+E">E. Di Marco</a>, <a href="/search/physics?searchtype=author&query=D%27Imperio%2C+G">G. D'Imperio</a>, <a href="/search/physics?searchtype=author&query=Dho%2C+G">G. Dho</a>, <a href="/search/physics?searchtype=author&query=Iacoangeli%2C+F">F. Iacoangeli</a>, <a href="/search/physics?searchtype=author&query=Maccarrone%2C+G">G. Maccarrone</a>, <a href="/search/physics?searchtype=author&query=Marafini%2C+M">M. Marafini</a>, <a href="/search/physics?searchtype=author&query=Mazzitelli%2C+G">G. Mazzitelli</a>, <a href="/search/physics?searchtype=author&query=Messina%2C+A">A. Messina</a>, <a href="/search/physics?searchtype=author&query=Orlandi%2C+A">A. Orlandi</a>, <a href="/search/physics?searchtype=author&query=Paoletti%2C+E">E. Paoletti</a>, <a href="/search/physics?searchtype=author&query=Passamonti%2C+L">L. Passamonti</a>, <a href="/search/physics?searchtype=author&query=Petrucci%2C+F">F. Petrucci</a>, <a href="/search/physics?searchtype=author&query=Piccolo%2C+D">D. Piccolo</a>, <a href="/search/physics?searchtype=author&query=Pierluigi%2C+D">D. Pierluigi</a>, <a href="/search/physics?searchtype=author&query=Pinci%2C+D">D. Pinci</a>, <a href="/search/physics?searchtype=author&query=Renga%2C+F">F. Renga</a>, <a href="/search/physics?searchtype=author&query=Rosatelli%2C+F">F. Rosatelli</a> , et al. (3 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="2004.10493v3-abstract-short" style="display: inline;"> Optical readout of Gas Electron Multipliers (GEM) provides very interesting performances and has been proposed for different applications in particle physics. In particular, thanks to its good efficiency in the keV energy range, it is being developed for low-energy and rare event studies, such as Dark Matter search. So far, the optical approach exploits the light produced during the avalanche proc… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2004.10493v3-abstract-full').style.display = 'inline'; document.getElementById('2004.10493v3-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2004.10493v3-abstract-full" style="display: none;"> Optical readout of Gas Electron Multipliers (GEM) provides very interesting performances and has been proposed for different applications in particle physics. In particular, thanks to its good efficiency in the keV energy range, it is being developed for low-energy and rare event studies, such as Dark Matter search. So far, the optical approach exploits the light produced during the avalanche processes in GEM channels. Further luminescence in the gas can be induced by electrons accelerated by a suitable electric field. The CYGNO collaboration studied this process with a combined use of a triple-GEM structure and a grid in an He/CF$_4$ (60/40) gas mixture at atmospheric pressure. Results reported in this paper allow to conclude that with an electric field of about 11~kV/cm a photon production mean free path of about 1.0~cm was found. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2004.10493v3-abstract-full').style.display = 'none'; document.getElementById('2004.10493v3-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> 2 July, 2020; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 22 April, 2020; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> April 2020. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> JINST 15, no.08, P08018 (2020) </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2001.02453">arXiv:2001.02453</a> <span> [<a href="https://arxiv.org/pdf/2001.02453">pdf</a>, <a href="https://arxiv.org/format/2001.02453">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/NSS/MIC42101.2019.9059678">10.1109/NSS/MIC42101.2019.9059678 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> A 1 m$^3$ Gas Time Projection Chamber with Optical Readout for Directional Dark Matter Searches: the CYGNO Experiment </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Baracchini%2C+E">E. Baracchini</a>, <a href="/search/physics?searchtype=author&query=Bedogni%2C+R">R. Bedogni</a>, <a href="/search/physics?searchtype=author&query=Bellini%2C+F">F. Bellini</a>, <a href="/search/physics?searchtype=author&query=Benussi%2C+L">L. Benussi</a>, <a href="/search/physics?searchtype=author&query=Bianco%2C+S">S. Bianco</a>, <a href="/search/physics?searchtype=author&query=Capoccia%2C+C">C. Capoccia</a>, <a href="/search/physics?searchtype=author&query=Caponero%2C+M">M. Caponero</a>, <a href="/search/physics?searchtype=author&query=Cavoto%2C+G">G. Cavoto</a>, <a href="/search/physics?searchtype=author&query=Costa%2C+I+A">I. A. Costa</a>, <a href="/search/physics?searchtype=author&query=Di+Marco%2C+E">E. Di Marco</a>, <a href="/search/physics?searchtype=author&query=D%27Imperio%2C+G">G. D'Imperio</a>, <a href="/search/physics?searchtype=author&query=Iacoangeli%2C+F">F. Iacoangeli</a>, <a href="/search/physics?searchtype=author&query=Maccarone%2C+G">G. Maccarone</a>, <a href="/search/physics?searchtype=author&query=Marafini%2C+M">M. Marafini</a>, <a href="/search/physics?searchtype=author&query=Mazzitelli%2C+G">G. Mazzitelli</a>, <a href="/search/physics?searchtype=author&query=Messina%2C+A">A. Messina</a>, <a href="/search/physics?searchtype=author&query=Orlandi%2C+A">A. Orlandi</a>, <a href="/search/physics?searchtype=author&query=Paoletti%2C+E">E. Paoletti</a>, <a href="/search/physics?searchtype=author&query=Passamonti%2C+L">L. Passamonti</a>, <a href="/search/physics?searchtype=author&query=Pelosi%2C+A">A. Pelosi</a>, <a href="/search/physics?searchtype=author&query=Petrucci%2C+F">F. Petrucci</a>, <a href="/search/physics?searchtype=author&query=Piccolo%2C+D">D. Piccolo</a>, <a href="/search/physics?searchtype=author&query=Pierluigi%2C+D">D. Pierluigi</a>, <a href="/search/physics?searchtype=author&query=Pinci%2C+D">D. Pinci</a>, <a href="/search/physics?searchtype=author&query=Renga%2C+F">F. Renga</a> , et al. (3 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="2001.02453v1-abstract-short" style="display: inline;"> The aim of the CYGNO project is the construction and operation of a 1~m$^3$ gas TPC for directional dark matter searches and coherent neutrino scattering measurements, as a prototype toward the 100-1000~m$^3$ (0.15-1.5 tons) CYGNUS network of underground experiments. In such a TPC, electrons produced by dark-matter- or neutrino-induced nuclear recoils will drift toward and will be multiplied by a… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2001.02453v1-abstract-full').style.display = 'inline'; document.getElementById('2001.02453v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2001.02453v1-abstract-full" style="display: none;"> The aim of the CYGNO project is the construction and operation of a 1~m$^3$ gas TPC for directional dark matter searches and coherent neutrino scattering measurements, as a prototype toward the 100-1000~m$^3$ (0.15-1.5 tons) CYGNUS network of underground experiments. In such a TPC, electrons produced by dark-matter- or neutrino-induced nuclear recoils will drift toward and will be multiplied by a three-layer GEM structure, and the light produced in the avalanche processes will be readout by a sCMOS camera, providing a 2D image of the event with a resolution of a few hundred micrometers. Photomultipliers will also provide a simultaneous fast readout of the time profile of the light production, giving information about the third coordinate and hence allowing a 3D reconstruction of the event, from which the direction of the nuclear recoil and consequently the direction of the incoming particle can be inferred. Such a detailed reconstruction of the event topology will also allow a pure and efficient signal to background discrimination. These two features are the key to reach and overcome the solar neutrino background that will ultimately limit non-directional dark matter searches. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2001.02453v1-abstract-full').style.display = 'none'; document.getElementById('2001.02453v1-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 January, 2020; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> January 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">5 page, 7 figures, contribution to the Conference Records of 2018 IEEE NSS/MIC</span> </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1910.00250">arXiv:1910.00250</a> <span> [<a href="https://arxiv.org/pdf/1910.00250">pdf</a>, <a href="https://arxiv.org/ps/1910.00250">ps</a>, <a href="https://arxiv.org/format/1910.00250">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link 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/10.1140/epjc/s10052-019-7515-8">10.1140/epjc/s10052-019-7515-8 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Reduction of multiple scattering of high-energy positively charged particles during channeling in single crystals </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Scandale%2C+W">W. Scandale</a>, <a href="/search/physics?searchtype=author&query=Esposito%2C+L+S">L. S. Esposito</a>, <a href="/search/physics?searchtype=author&query=Garattini%2C+M">M. Garattini</a>, <a href="/search/physics?searchtype=author&query=Rossi%2C+R">R. Rossi</a>, <a href="/search/physics?searchtype=author&query=Zhovkovska%2C+V">V. Zhovkovska</a>, <a href="/search/physics?searchtype=author&query=Natochii%2C+A">A. Natochii</a>, <a href="/search/physics?searchtype=author&query=Addesa%2C+F">F. Addesa</a>, <a href="/search/physics?searchtype=author&query=Iacoangeli%2C+F">F. Iacoangeli</a>, <a href="/search/physics?searchtype=author&query=Galluccio%2C+F">F. Galluccio</a>, <a href="/search/physics?searchtype=author&query=Murtas%2C+F">F. Murtas</a>, <a href="/search/physics?searchtype=author&query=Afonin%2C+A+G">A. G. Afonin</a>, <a href="/search/physics?searchtype=author&query=Chesnokov%2C+Y+A">Yu. A. Chesnokov</a>, <a href="/search/physics?searchtype=author&query=Durum%2C+A+A">A. A. Durum</a>, <a href="/search/physics?searchtype=author&query=Maisheev%2C+V+A">V. A. Maisheev</a>, <a href="/search/physics?searchtype=author&query=Sandomirskiy%2C+Y+E">Yu. E. Sandomirskiy</a>, <a href="/search/physics?searchtype=author&query=Yanovich%2C+A+A">A. A. Yanovich</a>, <a href="/search/physics?searchtype=author&query=Smirnov%2C+G+I">G. I. Smirnov</a>, <a href="/search/physics?searchtype=author&query=Gavrikov%2C+Y+A">Yu. A. Gavrikov</a>, <a href="/search/physics?searchtype=author&query=Ivanov%2C+Y+M">Yu. M. Ivanov</a>, <a href="/search/physics?searchtype=author&query=Koznov%2C+M+A">M. A. Koznov</a>, <a href="/search/physics?searchtype=author&query=Malkov%2C+M+V">M. V. Malkov</a>, <a href="/search/physics?searchtype=author&query=Malyarenko%2C+L+G">L. G. Malyarenko</a>, <a href="/search/physics?searchtype=author&query=Mamunct%2C+I+G">I. G. Mamunct</a>, <a href="/search/physics?searchtype=author&query=Borg%2C+J">J. Borg</a>, <a href="/search/physics?searchtype=author&query=James%2C+T">T. James</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="1910.00250v1-abstract-short" style="display: inline;"> We present the experimental observation of the reduction of multiple scattering of high-energy positively charged particles during channeling in single crystals. According to our measurements the rms angle of multiple scattering in the plane orthogonal to the plane of the channeling is less than half that for non-channeled particles moving in the same crystal. In the experiment we use focusing ben… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1910.00250v1-abstract-full').style.display = 'inline'; document.getElementById('1910.00250v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1910.00250v1-abstract-full" style="display: none;"> We present the experimental observation of the reduction of multiple scattering of high-energy positively charged particles during channeling in single crystals. According to our measurements the rms angle of multiple scattering in the plane orthogonal to the plane of the channeling is less than half that for non-channeled particles moving in the same crystal. In the experiment we use focusing bent single crystals. Such crystals have a variable thickness in the direction of beam propagation. This allows us to measure rms angles of scattering as a function of thickness for channeled and non-channeled particles. The behaviour with thickness of non-channeled particles is in agreement with expectations whereas the behaviour of channeled particles has unexpected features. We give a semi-quantitative explanation of the observed effect. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1910.00250v1-abstract-full').style.display = 'none'; document.getElementById('1910.00250v1-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> 1 October, 2019; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> October 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">13 pages, 7 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/1909.13716">arXiv:1909.13716</a> <span> [<a href="https://arxiv.org/pdf/1909.13716">pdf</a>, <a href="https://arxiv.org/format/1909.13716">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/10.1088/1748-0221/15/01/P01036">10.1088/1748-0221/15/01/P01036 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Study of muon pair production from positron annihilation at threshold energy </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Amapane%2C+N">N. Amapane</a>, <a href="/search/physics?searchtype=author&query=Antonelli%2C+M">M. Antonelli</a>, <a href="/search/physics?searchtype=author&query=Anulli%2C+F">F. Anulli</a>, <a href="/search/physics?searchtype=author&query=Ballerini%2C+G">G. Ballerini</a>, <a href="/search/physics?searchtype=author&query=Bandiera%2C+L">L. Bandiera</a>, <a href="/search/physics?searchtype=author&query=Bartosik%2C+N">N. Bartosik</a>, <a href="/search/physics?searchtype=author&query=Bauce%2C+M">M. Bauce</a>, <a href="/search/physics?searchtype=author&query=Bertolin%2C+A">A. Bertolin</a>, <a href="/search/physics?searchtype=author&query=Biino%2C+C">C. Biino</a>, <a href="/search/physics?searchtype=author&query=Blanco-Garcia%2C+O+R">O. R. Blanco-Garcia</a>, <a href="/search/physics?searchtype=author&query=Boscolo%2C+M">M. Boscolo</a>, <a href="/search/physics?searchtype=author&query=Brizzolari%2C+C">C. Brizzolari</a>, <a href="/search/physics?searchtype=author&query=Cappati%2C+A">A. Cappati</a>, <a href="/search/physics?searchtype=author&query=Casarsa%2C+M">M. Casarsa</a>, <a href="/search/physics?searchtype=author&query=Cavoto%2C+G">G. Cavoto</a>, <a href="/search/physics?searchtype=author&query=Collamati%2C+F">F. Collamati</a>, <a href="/search/physics?searchtype=author&query=Cotto%2C+G">G. Cotto</a>, <a href="/search/physics?searchtype=author&query=Curatolo%2C+C">C. Curatolo</a>, <a href="/search/physics?searchtype=author&query=Di+Nardo%2C+R">R. Di Nardo</a>, <a href="/search/physics?searchtype=author&query=Gonella%2C+F">F. Gonella</a>, <a href="/search/physics?searchtype=author&query=Hoh%2C+S">S. Hoh</a>, <a href="/search/physics?searchtype=author&query=Iafrati%2C+M">M. Iafrati</a>, <a href="/search/physics?searchtype=author&query=Iacoangeli%2C+F">F. Iacoangeli</a>, <a href="/search/physics?searchtype=author&query=Kiani%2C+B">B. Kiani</a>, <a href="/search/physics?searchtype=author&query=Lucchesi%2C+D">D. Lucchesi</a> , et al. (17 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="1909.13716v2-abstract-short" style="display: inline;"> The muon collider represents one of the most promising solutions for a future machine exploring the high energy frontier, but several challenges due to the 2.2 $渭$sec muon lifetime at rest have to be carefully considered. The LEMMA project is investigating the possibility of producing low emittance muon/antimuon pairs from the e$^+$e$^-$ annihilation process at threshold energy, resulting in small… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1909.13716v2-abstract-full').style.display = 'inline'; document.getElementById('1909.13716v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1909.13716v2-abstract-full" style="display: none;"> The muon collider represents one of the most promising solutions for a future machine exploring the high energy frontier, but several challenges due to the 2.2 $渭$sec muon lifetime at rest have to be carefully considered. The LEMMA project is investigating the possibility of producing low emittance muon/antimuon pairs from the e$^+$e$^-$ annihilation process at threshold energy, resulting in small transverse emittance beams without any additional beam cooling. However most of the measurements available are performed at higher $\sqrt{s}$ values. It is therefore necessary to measure muons production in positron annihilation at threshold energy and compare the experimental results with the predictions in this specific energy regime. Apart from being a topic of physical interest by itself, these near to threshold measurements can have a sizeable impact on the estimation of the ultimate luminosity achievable in a muon collider with the LEMMA injection scheme. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1909.13716v2-abstract-full').style.display = 'none'; document.getElementById('1909.13716v2-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, 2020; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 30 September, 2019; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> September 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">13 pages, 8 figures</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> 2020 JINST 15 P01036 </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1909.02756">arXiv:1909.02756</a> <span> [<a href="https://arxiv.org/pdf/1909.02756">pdf</a>, <a href="https://arxiv.org/format/1909.02756">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Accelerator Physics">physics.acc-ph</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"> Double-crystal setup measurements at the CERN SPS </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Scandale%2C+W">W. Scandale</a>, <a href="/search/physics?searchtype=author&query=Cerutti%2C+F">F. Cerutti</a>, <a href="/search/physics?searchtype=author&query=Esposito%2C+L+S">L. S. Esposito</a>, <a href="/search/physics?searchtype=author&query=Garattini%2C+M">M. Garattini</a>, <a href="/search/physics?searchtype=author&query=Gilardoni%2C+S">S. Gilardoni</a>, <a href="/search/physics?searchtype=author&query=Montesano%2C+S">S. Montesano</a>, <a href="/search/physics?searchtype=author&query=Rossi%2C+R">R. Rossi</a>, <a href="/search/physics?searchtype=author&query=Burmistrov%2C+L">L. Burmistrov</a>, <a href="/search/physics?searchtype=author&query=Dubos%2C+S">S. Dubos</a>, <a href="/search/physics?searchtype=author&query=Natochii%2C+A">A. Natochii</a>, <a href="/search/physics?searchtype=author&query=Puill%2C+V">V. Puill</a>, <a href="/search/physics?searchtype=author&query=Stocchi%2C+A">A. Stocchi</a>, <a href="/search/physics?searchtype=author&query=Zhovkovska%2C+V">V. Zhovkovska</a>, <a href="/search/physics?searchtype=author&query=Murtas%2C+F">F. Murtas</a>, <a href="/search/physics?searchtype=author&query=Addesa%2C+F">F. Addesa</a>, <a href="/search/physics?searchtype=author&query=Iacoangeli%2C+F">F. Iacoangeli</a>, <a href="/search/physics?searchtype=author&query=Galluccio%2C+F">F. Galluccio</a>, <a href="/search/physics?searchtype=author&query=Kovalenko%2C+A+D">A. D. Kovalenko</a>, <a href="/search/physics?searchtype=author&query=Taratin%2C+A+M">A. M. Taratin</a>, <a href="/search/physics?searchtype=author&query=Smirnov%2C+G+I">G. I. Smirnov</a>, <a href="/search/physics?searchtype=author&query=Denisov%2C+A+S">A. S. Denisov</a>, <a href="/search/physics?searchtype=author&query=Gavrikov%2C+Y+A">Yu. A. Gavrikov</a>, <a href="/search/physics?searchtype=author&query=Ivanov%2C+Y+M">Yu. M. Ivanov</a>, <a href="/search/physics?searchtype=author&query=Lapina%2C+L+P">L. P. Lapina</a>, <a href="/search/physics?searchtype=author&query=Malyarenko%2C+L+G">L. G. Malyarenko</a> , et al. (11 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="1909.02756v1-abstract-short" style="display: inline;"> In this paper, we discuss an experimental layout for the two-crystals scenario at the Super Proton Synchrotron (SPS) accelerator. The research focuses on a fixed target setup at the circulating machine in a frame of the Physics Beyond Colliders (PBC) project at CERN. The UA9 experiment at the SPS serves as a testbench for the proof of concept, which is planning to be projected onto the Large Hadro… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1909.02756v1-abstract-full').style.display = 'inline'; document.getElementById('1909.02756v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1909.02756v1-abstract-full" style="display: none;"> In this paper, we discuss an experimental layout for the two-crystals scenario at the Super Proton Synchrotron (SPS) accelerator. The research focuses on a fixed target setup at the circulating machine in a frame of the Physics Beyond Colliders (PBC) project at CERN. The UA9 experiment at the SPS serves as a testbench for the proof of concept, which is planning to be projected onto the Large Hadron Collider (LHC) scale. The presented in the text configuration was used for the quantitative characterization of the deflected particle beam by a pair of bent silicon crystals. For the first time in the double-crystal configuration, a particle deflection efficiency by the second crystal of $0.188 \pm 3 \cdot 10^{-5}$ and $0.179 \pm 0.013$ was measured on the accelerator by means of the Timepix detector and Beam Loss Monitor (BLM) respectively. In this setup, a wide range angular scan allowed a possibility to \textit{in situ} investigate different crystal working regimes (channeling, volume reflection, etc.), and to measure a bent crystal torsion. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1909.02756v1-abstract-full').style.display = 'none'; document.getElementById('1909.02756v1-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 September, 2019; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> September 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">6 pages, 8 figures. To be submitted to PLB</span> </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1905.11677">arXiv:1905.11677</a> <span> [<a href="https://arxiv.org/pdf/1905.11677">pdf</a>, <a href="https://arxiv.org/format/1905.11677">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/10.1088/1748-0221/15/01/P01017">10.1088/1748-0221/15/01/P01017 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Results on Multiple Coulomb Scattering from 12 and 20 GeV electrons on Carbon targets </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Abbiendi%2C+G">G. Abbiendi</a>, <a href="/search/physics?searchtype=author&query=Bernhard%2C+J">J. Bernhard</a>, <a href="/search/physics?searchtype=author&query=Betti%2C+F">F. Betti</a>, <a href="/search/physics?searchtype=author&query=Bonanomi%2C+M">M. Bonanomi</a>, <a href="/search/physics?searchtype=author&query=Calame%2C+C+M+C">C. M. Carloni Calame</a>, <a href="/search/physics?searchtype=author&query=Garattini%2C+M">M. Garattini</a>, <a href="/search/physics?searchtype=author&query=Gavrikov%2C+Y">Y. Gavrikov</a>, <a href="/search/physics?searchtype=author&query=Hall%2C+G">G. Hall</a>, <a href="/search/physics?searchtype=author&query=Iacoangeli%2C+F">F. Iacoangeli</a>, <a href="/search/physics?searchtype=author&query=Ignatov%2C+F">F. Ignatov</a>, <a href="/search/physics?searchtype=author&query=Incagli%2C+M">M. Incagli</a>, <a href="/search/physics?searchtype=author&query=Ivanchenko%2C+V">V. Ivanchenko</a>, <a href="/search/physics?searchtype=author&query=Ligabue%2C+F">F. Ligabue</a>, <a href="/search/physics?searchtype=author&query=James%2C+T+O">T. O. James</a>, <a href="/search/physics?searchtype=author&query=Marconi%2C+U">U. Marconi</a>, <a href="/search/physics?searchtype=author&query=Matteuzzi%2C+C">C. Matteuzzi</a>, <a href="/search/physics?searchtype=author&query=Passera%2C+M">M. Passera</a>, <a href="/search/physics?searchtype=author&query=Pesaresi%2C+M">M. Pesaresi</a>, <a href="/search/physics?searchtype=author&query=Piccinini%2C+F">F. Piccinini</a>, <a href="/search/physics?searchtype=author&query=Pilato%2C+R+N">R. N. Pilato</a>, <a href="/search/physics?searchtype=author&query=Pisani%2C+F">F. Pisani</a>, <a href="/search/physics?searchtype=author&query=Principe%2C+A">A. Principe</a>, <a href="/search/physics?searchtype=author&query=Scandale%2C+W">W. Scandale</a>, <a href="/search/physics?searchtype=author&query=Tenchini%2C+R">R. Tenchini</a>, <a href="/search/physics?searchtype=author&query=Venanzoni%2C+G">G. Venanzoni</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="1905.11677v2-abstract-short" style="display: inline;"> Multiple scattering effects of 12 and 20 GeV electrons on 8 and 20 mm thickness carbon targets have been studied with high-resolution silicon microstrip detectors of the UA9 apparatus at the H8 line at CERN. Comparison of the scattering angle between data and GEANT4 simulation shows excellent agreement in the core of the distributions leaving some residual disagreement in the tails. </span> <span class="abstract-full has-text-grey-dark mathjax" id="1905.11677v2-abstract-full" style="display: none;"> Multiple scattering effects of 12 and 20 GeV electrons on 8 and 20 mm thickness carbon targets have been studied with high-resolution silicon microstrip detectors of the UA9 apparatus at the H8 line at CERN. Comparison of the scattering angle between data and GEANT4 simulation shows excellent agreement in the core of the distributions leaving some residual disagreement in the tails. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1905.11677v2-abstract-full').style.display = 'none'; document.getElementById('1905.11677v2-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 April, 2020; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 28 May, 2019; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> May 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">14 pages, 16 figures. Updated to match published version</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> JINST 15 (2020) 01, P01017 </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1905.05747">arXiv:1905.05747</a> <span> [<a href="https://arxiv.org/pdf/1905.05747">pdf</a>, <a href="https://arxiv.org/format/1905.05747">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Accelerator Physics">physics.acc-ph</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"> Positron driven muon source for a muon collider </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Alesini%2C+D">D. Alesini</a>, <a href="/search/physics?searchtype=author&query=Antonelli%2C+M">M. Antonelli</a>, <a href="/search/physics?searchtype=author&query=Biagini%2C+M+E">M. E. Biagini</a>, <a href="/search/physics?searchtype=author&query=Boscolo%2C+M">M. Boscolo</a>, <a href="/search/physics?searchtype=author&query=Blanco-Garc%C3%ADa%2C+O+R">O. R. Blanco-Garc铆a</a>, <a href="/search/physics?searchtype=author&query=Ciarma%2C+A">A. Ciarma</a>, <a href="/search/physics?searchtype=author&query=Cimino%2C+R">R. Cimino</a>, <a href="/search/physics?searchtype=author&query=Iafrati%2C+M">M. Iafrati</a>, <a href="/search/physics?searchtype=author&query=Giribono%2C+A">A. Giribono</a>, <a href="/search/physics?searchtype=author&query=Guiducci%2C+S">S. Guiducci</a>, <a href="/search/physics?searchtype=author&query=Pellegrino%2C+L">L. Pellegrino</a>, <a href="/search/physics?searchtype=author&query=Rotondo%2C+M">M. Rotondo</a>, <a href="/search/physics?searchtype=author&query=Vaccarezza%2C+C">C. Vaccarezza</a>, <a href="/search/physics?searchtype=author&query=Variola%2C+A">A. Variola</a>, <a href="/search/physics?searchtype=author&query=Allegrucci%2C+A">A. Allegrucci</a>, <a href="/search/physics?searchtype=author&query=Anulli%2C+F">F. Anulli</a>, <a href="/search/physics?searchtype=author&query=Bauce%2C+M">M. Bauce</a>, <a href="/search/physics?searchtype=author&query=Collamati%2C+F">F. Collamati</a>, <a href="/search/physics?searchtype=author&query=Cavoto%2C+G">G. Cavoto</a>, <a href="/search/physics?searchtype=author&query=Cesarini%2C+G">G. Cesarini</a>, <a href="/search/physics?searchtype=author&query=Iacoangeli%2C+F">F. Iacoangeli</a>, <a href="/search/physics?searchtype=author&query=Voti%2C+R+L">R. Li Voti</a>, <a href="/search/physics?searchtype=author&query=Bacci%2C+A">A. Bacci</a>, <a href="/search/physics?searchtype=author&query=Drebot%2C+I">I. Drebot</a>, <a href="/search/physics?searchtype=author&query=Raimondi%2C+P">P. Raimondi</a> , et al. (33 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="1905.05747v2-abstract-short" style="display: inline;"> The design of a future multi-TeV muon collider needs new ideas to overcome the technological challenges related to muon production, cooling, accumulation and acceleration. In this paper a layout of a positron driven muon source known as the Low EMittance Muon Accelerator (LEMMA) concept is presented. The positron beam, stored in a ring with high energy acceptance and low emittance, is extracted an… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1905.05747v2-abstract-full').style.display = 'inline'; document.getElementById('1905.05747v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1905.05747v2-abstract-full" style="display: none;"> The design of a future multi-TeV muon collider needs new ideas to overcome the technological challenges related to muon production, cooling, accumulation and acceleration. In this paper a layout of a positron driven muon source known as the Low EMittance Muon Accelerator (LEMMA) concept is presented. The positron beam, stored in a ring with high energy acceptance and low emittance, is extracted and driven to a multi-target system, to produce muon pairs at threshold. This solution alleviates the issues related to the power deposited and the integrated Peak Energy Density Deposition (PEDD) on the targets. Muons produced in the multi-target system will then be accumulated before acceleration and injection in the collider. A multi-target line lattice has been designed to cope with the focusing of both the positron and muon beams. Studies on the number, material and thickness of the targets have been carried out. A general layout of the overall scheme and a description is presented, as well as plans for future R&D. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1905.05747v2-abstract-full').style.display = 'none'; document.getElementById('1905.05747v2-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 May, 2019; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 14 May, 2019; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> May 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">18 pages, 32 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/1904.06178">arXiv:1904.06178</a> <span> [<a href="https://arxiv.org/pdf/1904.06178">pdf</a>, <a href="https://arxiv.org/format/1904.06178">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/10.1016/j.nima.2019.162513">10.1016/j.nima.2019.162513 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Commissioning and operation of the Cherenkov detector for proton Flux Measurement of the UA9 Experiment </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Addesa%2C+F+M">F. M. Addesa</a>, <a href="/search/physics?searchtype=author&query=Burmistrov%2C+L">L. Burmistrov</a>, <a href="/search/physics?searchtype=author&query=Breton%2C+D">D. Breton</a>, <a href="/search/physics?searchtype=author&query=Cavoto%2C+G">G. Cavoto</a>, <a href="/search/physics?searchtype=author&query=Chaumat%2C+V">V. Chaumat</a>, <a href="/search/physics?searchtype=author&query=Dubos%2C+S">S. Dubos</a>, <a href="/search/physics?searchtype=author&query=Esposito%2C+L">L. Esposito</a>, <a href="/search/physics?searchtype=author&query=Galluccio%2C+F">F. Galluccio</a>, <a href="/search/physics?searchtype=author&query=Garattini%2C+M">M. Garattini</a>, <a href="/search/physics?searchtype=author&query=Iacoangeli%2C+F">F. Iacoangeli</a>, <a href="/search/physics?searchtype=author&query=Maalmi%2C+J">J. Maalmi</a>, <a href="/search/physics?searchtype=author&query=Mirarchi%2C+D">D. Mirarchi</a>, <a href="/search/physics?searchtype=author&query=Natochii%2C+A">A. Natochii</a>, <a href="/search/physics?searchtype=author&query=Puill%2C+V">V. Puill</a>, <a href="/search/physics?searchtype=author&query=Rossi%2C+R">R. Rossi</a>, <a href="/search/physics?searchtype=author&query=Scandale%2C+W">W. Scandale</a>, <a href="/search/physics?searchtype=author&query=Montesano%2C+S">S. Montesano</a>, <a href="/search/physics?searchtype=author&query=Stocchi%2C+A">A. Stocchi</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="1904.06178v1-abstract-short" style="display: inline;"> The UA9 Experiment at CERN-SPS investigates channeling processes in bent silicon crystals with the aim to manipulate hadron beams. Monitoring and characterization of channeled beams in the high energy accelerators environment ideally requires in-vacuum and radiation hard detectors. For this purpose the Cherenkov detector for proton Flux Measurement (CpFM) was designed and developed. It is based on… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1904.06178v1-abstract-full').style.display = 'inline'; document.getElementById('1904.06178v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1904.06178v1-abstract-full" style="display: none;"> The UA9 Experiment at CERN-SPS investigates channeling processes in bent silicon crystals with the aim to manipulate hadron beams. Monitoring and characterization of channeled beams in the high energy accelerators environment ideally requires in-vacuum and radiation hard detectors. For this purpose the Cherenkov detector for proton Flux Measurement (CpFM) was designed and developed. It is based on thin fused silica bars in the beam pipe vacuum which intercept charged particles and generate Cherenkov light. The first version of the CpFM is installed since 2015 in the crystal-assisted collimation setup of the UA9 experiment. In this paper the procedures to make the detector operational and fully integrated in the UA9 setup are described. The most important standard operations of the detector are presented. They have been used to commission and characterize the detector, providing moreover the measurement of the integrated channeled beam profile and several functionality tests as the determination of the crystal bending angle. The calibration has been performed with Lead (Pb) and Xenon (Xe) beams and the results are applied to the flux measurement discussed here in detail. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1904.06178v1-abstract-full').style.display = 'none'; document.getElementById('1904.06178v1-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 April, 2019; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> April 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">25 pages, 14 figures</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment 946 (2019), p. 162513. issn: 0168-9002 </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1707.05151">arXiv:1707.05151</a> <span> [<a href="https://arxiv.org/pdf/1707.05151">pdf</a>, <a href="https://arxiv.org/format/1707.05151">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Accelerator Physics">physics.acc-ph</span> </div> </div> <p class="title is-5 mathjax"> Experimental results of crystal-assisted slow extraction at the SPS </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Fraser%2C+M+A">M. A. Fraser</a>, <a href="/search/physics?searchtype=author&query=Addesa%2C+F">F. Addesa</a>, <a href="/search/physics?searchtype=author&query=Cavoto%2C+G">G. Cavoto</a>, <a href="/search/physics?searchtype=author&query=Galluccio%2C+F">F. Galluccio</a>, <a href="/search/physics?searchtype=author&query=Gilardoni%2C+S">S. Gilardoni</a>, <a href="/search/physics?searchtype=author&query=Goddard%2C+B">B. Goddard</a>, <a href="/search/physics?searchtype=author&query=Iacoangeli%2C+F">F. Iacoangeli</a>, <a href="/search/physics?searchtype=author&query=Kain%2C+V">V. Kain</a>, <a href="/search/physics?searchtype=author&query=Mirarchi%2C+D">D. Mirarchi</a>, <a href="/search/physics?searchtype=author&query=Montesano%2C+S">S. Montesano</a>, <a href="/search/physics?searchtype=author&query=Murtas%2C+F">F. Murtas</a>, <a href="/search/physics?searchtype=author&query=Petrucci%2C+S">S. Petrucci</a>, <a href="/search/physics?searchtype=author&query=Redaelli%2C+S">S. Redaelli</a>, <a href="/search/physics?searchtype=author&query=Rossi%2C+R">R. Rossi</a>, <a href="/search/physics?searchtype=author&query=Scandale%2C+W">W. Scandale</a>, <a href="/search/physics?searchtype=author&query=Stoel%2C+L">L. Stoel</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="1707.05151v1-abstract-short" style="display: inline;"> The possibility of extracting highly energetic particles from the Super Proton Synchrotron (SPS) by means of silicon bent crystals has been explored since the 1990's. The channelling effect of a bent crystal can be used to strongly deflect primary protons and eject them from the synchrotron. Many studies and experiments have been carried out to investigate crystal channelling effects. The extracti… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1707.05151v1-abstract-full').style.display = 'inline'; document.getElementById('1707.05151v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1707.05151v1-abstract-full" style="display: none;"> The possibility of extracting highly energetic particles from the Super Proton Synchrotron (SPS) by means of silicon bent crystals has been explored since the 1990's. The channelling effect of a bent crystal can be used to strongly deflect primary protons and eject them from the synchrotron. Many studies and experiments have been carried out to investigate crystal channelling effects. The extraction of 120 and 270 GeV proton beams has already been demonstrated in the SPS with dedicated experiments located in the ring. Presently in the SPS, the UA9 experiment is performing studies to evaluate the possibility to use bent silicon crystals to steer particle beams in high energy accelerators. Recent studies on the feasibility of extraction from the SPS have been made using the UA9 infrastructure with a longer-term view of using crystals to help mitigate slow extraction induced activation of the SPS. In this paper, the possibility to eject particles into the extraction channel in LSS2 using the bent crystals already installed in the SPS is presented. Details of the concept, simulations and measurements carried out with beam are presented, before the outlook for the future is discussed. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1707.05151v1-abstract-full').style.display = 'none'; document.getElementById('1707.05151v1-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 July, 2017; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> July 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">4 pages, 7 figures, submitted to to International Particle Accelerator Conference (IPAC) 2017 in Copenhagen, Denmark</span> </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1703.09843">arXiv:1703.09843</a> <span> [<a href="https://arxiv.org/pdf/1703.09843">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> <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="Physics Education">physics.ed-ph</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Physics and Society">physics.soc-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/10.1088/1742-6596/898/10/102011">10.1088/1742-6596/898/10/102011 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> An educational distributed Cosmic Ray detector network based on ArduSiPM </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Bocci%2C+V">V Bocci</a>, <a href="/search/physics?searchtype=author&query=Chiodi%2C+G">G Chiodi</a>, <a href="/search/physics?searchtype=author&query=Fresch%2C+P">P Fresch</a>, <a href="/search/physics?searchtype=author&query=Iacoangeli%2C+F">F Iacoangeli</a>, <a href="/search/physics?searchtype=author&query=Recchia%2C+L">L Recchia</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="1703.09843v1-abstract-short" style="display: inline;"> The advent of microcontrollers with enough CPU power and with analog and digital peripherals makes possible to design a complete particle detector with relative acquisition system around one microcontroller chip. The existence of a world wide data infrastructure as internet allows for devising a distributed network of cheap detectors capable to elaborate and send data or respond to settings comman… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1703.09843v1-abstract-full').style.display = 'inline'; document.getElementById('1703.09843v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1703.09843v1-abstract-full" style="display: none;"> The advent of microcontrollers with enough CPU power and with analog and digital peripherals makes possible to design a complete particle detector with relative acquisition system around one microcontroller chip. The existence of a world wide data infrastructure as internet allows for devising a distributed network of cheap detectors capable to elaborate and send data or respond to settings commands. The internet infrastructure enables to distribute the absolute time (with precision of few milliseconds), to the simple devices far apart, with few milliseconds precision, from a few meters to thousands of kilometres. So it is possible to create a crowdsourcing experiment of citizen science that use small scintillation-based particle detectors to monitor the high energetic cosmic ray and the radiation environment. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1703.09843v1-abstract-full').style.display = 'none'; document.getElementById('1703.09843v1-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 March, 2017; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> March 2017. </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1506.01915">arXiv:1506.01915</a> <span> [<a href="https://arxiv.org/pdf/1506.01915">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> <p class="title is-5 mathjax"> A low cost network of spectrometer radiation detectors based on the ArduSiPM a compact transportable Software/Hardware Data Acquisition system with Arduino DUE </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Bocci%2C+V">Valerio Bocci</a>, <a href="/search/physics?searchtype=author&query=Chiodi%2C+G">Giacomo Chiodi</a>, <a href="/search/physics?searchtype=author&query=Iacoangeli%2C+F">Francesco Iacoangeli</a>, <a href="/search/physics?searchtype=author&query=Nuccetelli%2C+M">Massimo Nuccetelli</a>, <a href="/search/physics?searchtype=author&query=Recchia%2C+L">Luigi Recchia</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="1506.01915v1-abstract-short" style="display: inline;"> The necessity to use Photo Multipliers (PM) as light detector limited in the past the use of crystals in radiation handled device preferring the Geiger approach. The Silicon Photomultipliers (SiPMs) are very small and cheap, solid photon detectors with good dynamic range and single photon detection capability, they are usable to supersede in some application cumbersome and difficult to use Photo M… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1506.01915v1-abstract-full').style.display = 'inline'; document.getElementById('1506.01915v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1506.01915v1-abstract-full" style="display: none;"> The necessity to use Photo Multipliers (PM) as light detector limited in the past the use of crystals in radiation handled device preferring the Geiger approach. The Silicon Photomultipliers (SiPMs) are very small and cheap, solid photon detectors with good dynamic range and single photon detection capability, they are usable to supersede in some application cumbersome and difficult to use Photo Multipliers (PM). A SiPM can be coupled with a scintillator crystal to build efficient, small and solid radiation detector. A cost effective and easily replicable Hardware software module for SiPM detector readout is made using the ArduSiPM solution [1]. The ArduSiPM is an easily battery operable handled device using an Arduino DUE (an open Software/Hardware board) as processor board and a piggy-back custom designed board (ArduSiPM Shield), the Shield contains all the blocks features to monitor, set and acquire the SiPM using internet network. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1506.01915v1-abstract-full').style.display = 'none'; document.getElementById('1506.01915v1-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> 5 June, 2015; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> June 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">arXiv admin note: text overlap with arXiv:1411.7814</span> </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1411.7814">arXiv:1411.7814</a> <span> [<a href="https://arxiv.org/pdf/1411.7814">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> <p class="title is-5 mathjax"> The ArduSiPM a compact trasportable Software/Hardware Data Acquisition system for SiPM detector </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Bocci%2C+V">Valerio Bocci</a>, <a href="/search/physics?searchtype=author&query=Chiodi%2C+G">Giacomo Chiodi</a>, <a href="/search/physics?searchtype=author&query=Iacoangeli%2C+F">Francesco Iacoangeli</a>, <a href="/search/physics?searchtype=author&query=Nuccetelli%2C+M">Massimo Nuccetelli</a>, <a href="/search/physics?searchtype=author&query=Recchia%2C+L">Luigi Recchia</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="1411.7814v1-abstract-short" style="display: inline;"> The acquisition of a single Silicon Photomultiplier require multiple and expensive electronics modules as : preamplifier, discriminator, bias voltage power supply, temperature monitor, Scalers, Analog to Digital Converter and Time to Digital Converter . The developed ArduSiPM is a compact cost effective and easily replicable Hardware software module for SiPM detector readout. The ArduSiPM uses an… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1411.7814v1-abstract-full').style.display = 'inline'; document.getElementById('1411.7814v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1411.7814v1-abstract-full" style="display: none;"> The acquisition of a single Silicon Photomultiplier require multiple and expensive electronics modules as : preamplifier, discriminator, bias voltage power supply, temperature monitor, Scalers, Analog to Digital Converter and Time to Digital Converter . The developed ArduSiPM is a compact cost effective and easily replicable Hardware software module for SiPM detector readout. The ArduSiPM uses an Arduino DUE (an open Software/Hardware board based on an ARM Cortex-M3 microcontroller) as processor board and a piggyback custom designed board (Shield), these are controlled by custom developed software and interface. The Shield contains different electronics features both to monitor, to set and to acquire the SiPM signals using the microcontroller board. The shield embed a controlled bias voltage power supply, a fast voltage preamplifier, a programmable fast discriminator to generate over threshold digital pulse , a peak hold to measure the pulse height, a temperature monitor system, a scaler to monitor over threshold rate and arrival time of the pulses. A TCP/IP Wi-Fi or Ethernet connection is used both to control and to acquire the ArduSiPM remotely with either a PC software or a Tablet APP (depending on the application). <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1411.7814v1-abstract-full').style.display = 'none'; document.getElementById('1411.7814v1-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 November, 2014; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> November 2014. </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1211.1346">arXiv:1211.1346</a> <span> [<a href="https://arxiv.org/pdf/1211.1346">pdf</a>, <a href="https://arxiv.org/format/1211.1346">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/10.1088/1748-0221/8/02/P02022">10.1088/1748-0221/8/02/P02022 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Performance of the LHCb muon system </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Alves%2C+A+A">A. A. Alves Jr</a>, <a href="/search/physics?searchtype=author&query=Anderlini%2C+L">L. Anderlini</a>, <a href="/search/physics?searchtype=author&query=Anelli%2C+M">M. Anelli</a>, <a href="/search/physics?searchtype=author&query=Nobrega%2C+R+A">R. Antunes Nobrega</a>, <a href="/search/physics?searchtype=author&query=Auriemma%2C+G">G. Auriemma</a>, <a href="/search/physics?searchtype=author&query=Baldini%2C+W">W. Baldini</a>, <a href="/search/physics?searchtype=author&query=Bencivenni%2C+G">G. Bencivenni</a>, <a href="/search/physics?searchtype=author&query=Berutti%2C+R">R. Berutti</a>, <a href="/search/physics?searchtype=author&query=Bizzeti%2C+A">A. Bizzeti</a>, <a href="/search/physics?searchtype=author&query=Bocci%2C+V">V. Bocci</a>, <a href="/search/physics?searchtype=author&query=Bondar%2C+N">N. Bondar</a>, <a href="/search/physics?searchtype=author&query=Bonivento%2C+W">W. Bonivento</a>, <a href="/search/physics?searchtype=author&query=Botchin%2C+B">B. Botchin</a>, <a href="/search/physics?searchtype=author&query=Cadeddu%2C+S">S. Cadeddu</a>, <a href="/search/physics?searchtype=author&query=Campana%2C+P">P. Campana</a>, <a href="/search/physics?searchtype=author&query=Carboni%2C+G">G. Carboni</a>, <a href="/search/physics?searchtype=author&query=Cardini%2C+A">A. Cardini</a>, <a href="/search/physics?searchtype=author&query=Carletti%2C+M">M. Carletti</a>, <a href="/search/physics?searchtype=author&query=Ciambrone%2C+P">P. Ciambrone</a>, <a href="/search/physics?searchtype=author&query=De+Capua%2C+E+D+S">E. Dan茅 S. De Capua</a>, <a href="/search/physics?searchtype=author&query=De+Leo%2C+V">V. De Leo</a>, <a href="/search/physics?searchtype=author&query=Deplano%2C+C">C. Deplano</a>, <a href="/search/physics?searchtype=author&query=De+Simone%2C+P">P. De Simone</a>, <a href="/search/physics?searchtype=author&query=Dettori%2C+F">F. Dettori</a>, <a href="/search/physics?searchtype=author&query=Falabella%2C+A">A. Falabella</a> , et al. (48 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="1211.1346v2-abstract-short" style="display: inline;"> The performance of the LHCb Muon system and its stability across the full 2010 data taking with LHC running at ps = 7 TeV energy is studied. The optimization of the detector setting and the time calibration performed with the first collisions delivered by LHC is described. Particle rates, measured for the wide range of luminosities and beam operation conditions experienced during the run, are comp… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1211.1346v2-abstract-full').style.display = 'inline'; document.getElementById('1211.1346v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1211.1346v2-abstract-full" style="display: none;"> The performance of the LHCb Muon system and its stability across the full 2010 data taking with LHC running at ps = 7 TeV energy is studied. The optimization of the detector setting and the time calibration performed with the first collisions delivered by LHC is described. Particle rates, measured for the wide range of luminosities and beam operation conditions experienced during the run, are compared with the values expected from simulation. The space and time alignment of the detectors, chamber efficiency, time resolution and cluster size are evaluated. The detector performance is found to be as expected from specifications or better. Notably the overall efficiency is well above the design requirements <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1211.1346v2-abstract-full').style.display = 'none'; document.getElementById('1211.1346v2-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 February, 2013; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 6 November, 2012; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> November 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">JINST_015P_1112 2013</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Report number:</span> LHCb-DP-2012-002 </p> </li> </ol> <div class="is-hidden-tablet">  <span 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