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<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/2409.01058">arXiv:2409.01058</a> <span> [<a href="https://arxiv.org/pdf/2409.01058">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="Atomic Physics">physics.atom-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/10.1063/5.0196806">10.1063/5.0196806 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> TALOS (Total Automation of LabVIEW Operations for Science): A framework for autonomous control systems for complex experiments </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Volponi%2C+M">M. Volponi</a>, <a href="/search/physics?searchtype=author&query=Zieli%C5%84ski%2C+J">J. Zieli艅ski</a>, <a href="/search/physics?searchtype=author&query=Rauschendorfer%2C+T">T. Rauschendorfer</a>, <a href="/search/physics?searchtype=author&query=Huck%2C+S">S. Huck</a>, <a href="/search/physics?searchtype=author&query=Caravita%2C+R">R. Caravita</a>, <a href="/search/physics?searchtype=author&query=Auzins%2C+M">M. Auzins</a>, <a href="/search/physics?searchtype=author&query=Bergmann%2C+B">B. Bergmann</a>, <a href="/search/physics?searchtype=author&query=Burian%2C+P">P. Burian</a>, <a href="/search/physics?searchtype=author&query=Brusa%2C+R+S">R. S. Brusa</a>, <a href="/search/physics?searchtype=author&query=Camper%2C+A">A. Camper</a>, <a href="/search/physics?searchtype=author&query=Castelli%2C+F">F. Castelli</a>, <a href="/search/physics?searchtype=author&query=Cerchiari%2C+G">G. Cerchiari</a>, <a href="/search/physics?searchtype=author&query=Ciury%C5%82o%2C+R">R. Ciury艂o</a>, <a href="/search/physics?searchtype=author&query=Consolati%2C+G">G. Consolati</a>, <a href="/search/physics?searchtype=author&query=Doser%2C+M">M. Doser</a>, <a href="/search/physics?searchtype=author&query=Eliaszuk%2C+K">K. Eliaszuk</a>, <a href="/search/physics?searchtype=author&query=Giszczak%2C+A">A. Giszczak</a>, <a href="/search/physics?searchtype=author&query=Gl%C3%B6ggler%2C+L+T">L. T. Gl枚ggler</a>, <a href="/search/physics?searchtype=author&query=Graczykowski%2C+%C5%81">艁. Graczykowski</a>, <a href="/search/physics?searchtype=author&query=Grosbart%2C+M">M. Grosbart</a>, <a href="/search/physics?searchtype=author&query=Guatieri%2C+F">F. Guatieri</a>, <a href="/search/physics?searchtype=author&query=Gusakova%2C+N">N. Gusakova</a>, <a href="/search/physics?searchtype=author&query=Gustafsson%2C+F">F. Gustafsson</a>, <a href="/search/physics?searchtype=author&query=Haider%2C+S">S. Haider</a>, <a href="/search/physics?searchtype=author&query=Janik%2C+M+A">M. A. Janik</a> , et al. (30 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="2409.01058v1-abstract-short" style="display: inline;"> Modern physics experiments are frequently very complex, relying on multiple simultaneous events to happen in order to obtain the desired result. The experiment control system plays a central role in orchestrating the measurement setup: However, its development is often treated as secondary with respect to the hardware, its importance becoming evident only during the operational phase. Therefore, t… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2409.01058v1-abstract-full').style.display = 'inline'; document.getElementById('2409.01058v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2409.01058v1-abstract-full" style="display: none;"> Modern physics experiments are frequently very complex, relying on multiple simultaneous events to happen in order to obtain the desired result. The experiment control system plays a central role in orchestrating the measurement setup: However, its development is often treated as secondary with respect to the hardware, its importance becoming evident only during the operational phase. Therefore, the AEgIS (Antimatter Experiment: Gravity, Interferometry, Spectroscopy) collaboration has created a framework for easily coding control systems, specifically targeting atomic, quantum, and antimatter experiments. This framework, called Total Automation of LabVIEW Operations for Science (TALOS), unifies all the machines of the experiment in a single entity, thus enabling complex high-level decisions to be taken, and it is constituted by separate modules, called MicroServices, that run concurrently and asynchronously. This enhances the stability and reproducibility of the system while allowing for continuous integration and testing while the control system is running. The system demonstrated high stability and reproducibility, running completely unsupervised during the night and weekends of the data-taking campaigns. The results demonstrate the suitability of TALOS to manage an entire physics experiment in full autonomy: being open-source, experiments other than the AEgIS experiment can benefit from it. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2409.01058v1-abstract-full').style.display = 'none'; document.getElementById('2409.01058v1-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 September, 2024; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> September 2024. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Rev. Sci. Instrum. 95, 085116 (2024) </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2406.16044">arXiv:2406.16044</a> <span> [<a href="https://arxiv.org/pdf/2406.16044">pdf</a>, <a href="https://arxiv.org/format/2406.16044">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"> Real-time antiproton annihilation vertexing with sub-micron resolution </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Berghold%2C+M">M. Berghold</a>, <a href="/search/physics?searchtype=author&query=Orsucci%2C+D">D. Orsucci</a>, <a href="/search/physics?searchtype=author&query=Guatieri%2C+F">F. Guatieri</a>, <a href="/search/physics?searchtype=author&query=Alfaro%2C+S">S. Alfaro</a>, <a href="/search/physics?searchtype=author&query=Auzins%2C+M">M. Auzins</a>, <a href="/search/physics?searchtype=author&query=Bergmann%2C+B">B. Bergmann</a>, <a href="/search/physics?searchtype=author&query=Burian%2C+P">P. Burian</a>, <a href="/search/physics?searchtype=author&query=Brusa%2C+R+S">R. S. Brusa</a>, <a href="/search/physics?searchtype=author&query=Camper%2C+A">A. Camper</a>, <a href="/search/physics?searchtype=author&query=Caravita%2C+R">R. Caravita</a>, <a href="/search/physics?searchtype=author&query=Castelli%2C+F">F. Castelli</a>, <a href="/search/physics?searchtype=author&query=Cerchiari%2C+G">G. Cerchiari</a>, <a href="/search/physics?searchtype=author&query=Ciury%C5%82o%2C+R">R. Ciury艂o</a>, <a href="/search/physics?searchtype=author&query=Chehaimi%2C+A">A. Chehaimi</a>, <a href="/search/physics?searchtype=author&query=Consolati%2C+G">G. Consolati</a>, <a href="/search/physics?searchtype=author&query=Doser%2C+M">M. Doser</a>, <a href="/search/physics?searchtype=author&query=Eliaszuk%2C+K">K. Eliaszuk</a>, <a href="/search/physics?searchtype=author&query=Ferguson%2C+R">R. Ferguson</a>, <a href="/search/physics?searchtype=author&query=Germann%2C+M">M. Germann</a>, <a href="/search/physics?searchtype=author&query=Giszczak%2C+A">A. Giszczak</a>, <a href="/search/physics?searchtype=author&query=Gl%C3%B6ggler%2C+L+T">L. T. Gl枚ggler</a>, <a href="/search/physics?searchtype=author&query=Graczykowski%2C+%C5%81">艁. Graczykowski</a>, <a href="/search/physics?searchtype=author&query=Grosbart%2C+M">M. Grosbart</a>, <a href="/search/physics?searchtype=author&query=Guatieri%2C+F">F. Guatieri</a>, <a href="/search/physics?searchtype=author&query=Gusakova%2C+N">N. Gusakova</a> , et al. (42 additional authors not shown) </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2406.16044v1-abstract-short" style="display: inline;"> The primary goal of the AEgIS experiment is to precisely measure the free fall of antihydrogen within Earth's gravitational field. To this end, a cold ~50K antihydrogen beam has to pass through two grids forming a moir茅 deflectometer before annihilating onto a position-sensitive detector, which shall determine the vertical position of the annihilation vertex relative to the grids with micrometric… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2406.16044v1-abstract-full').style.display = 'inline'; document.getElementById('2406.16044v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2406.16044v1-abstract-full" style="display: none;"> The primary goal of the AEgIS experiment is to precisely measure the free fall of antihydrogen within Earth's gravitational field. To this end, a cold ~50K antihydrogen beam has to pass through two grids forming a moir茅 deflectometer before annihilating onto a position-sensitive detector, which shall determine the vertical position of the annihilation vertex relative to the grids with micrometric accuracy. Here we introduce a vertexing detector based on a modified mobile camera sensor and experimentally demonstrate that it can measure the position of antiproton annihilations with an accuracy of $0.62^{+0.40}_{-0.22}渭m$, which represents a 35-fold improvement over the previous state-of-the-art for real-time antiproton vertexing. Importantly, these antiproton detection methods are directly applicable to antihydrogen. Moreover, the sensitivity to light of the sensor enables the in-situ calibration of the moir茅 deflectometer, significantly reducing systematic errors. This sensor emerges as a breakthrough technology for achieving the \aegis scientific goals and has been selected as the basis for the development of a large-area detector for conducting antihydrogen gravity measurements. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2406.16044v1-abstract-full').style.display = 'none'; document.getElementById('2406.16044v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 23 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">21 pages, 4 figures, 2 tables</span> </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2402.04637">arXiv:2402.04637</a> <span> [<a href="https://arxiv.org/pdf/2402.04637">pdf</a>, <a href="https://arxiv.org/format/2402.04637">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Quantum Physics">quant-ph</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="General Relativity and Quantum Cosmology">gr-qc</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Atomic Physics">physics.atom-ph</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Instrumentation and Detectors">physics.ins-det</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1140/epjqt/s40507-024-00220-6">10.1140/epjqt/s40507-024-00220-6 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> CIRCUS: an autonomous control system for antimatter, atomic and quantum physics experiments </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Volponi%2C+M">Marco Volponi</a>, <a href="/search/physics?searchtype=author&query=Huck%2C+S">Saiva Huck</a>, <a href="/search/physics?searchtype=author&query=Caravita%2C+R">Ruggero Caravita</a>, <a href="/search/physics?searchtype=author&query=Zielinski%2C+J">Jakub Zielinski</a>, <a href="/search/physics?searchtype=author&query=Kornakov%2C+G">Georgy Kornakov</a>, <a href="/search/physics?searchtype=author&query=Kasprowicz%2C+G">Grzegorz Kasprowicz</a>, <a href="/search/physics?searchtype=author&query=Nowicka%2C+D">Dorota Nowicka</a>, <a href="/search/physics?searchtype=author&query=Rauschendorfer%2C+T">Tassilo Rauschendorfer</a>, <a href="/search/physics?searchtype=author&query=Rien%C3%A4cker%2C+B">Benjamin Rien盲cker</a>, <a href="/search/physics?searchtype=author&query=Prelz%2C+F">Francesco Prelz</a>, <a href="/search/physics?searchtype=author&query=Auzins%2C+M">Marcis Auzins</a>, <a href="/search/physics?searchtype=author&query=Bergmann%2C+B">Benedikt Bergmann</a>, <a href="/search/physics?searchtype=author&query=Burian%2C+P">Petr Burian</a>, <a href="/search/physics?searchtype=author&query=Brusa%2C+R+S">Roberto Sennen Brusa</a>, <a href="/search/physics?searchtype=author&query=Camper%2C+A">Antoine Camper</a>, <a href="/search/physics?searchtype=author&query=Castelli%2C+F">Fabrizio Castelli</a>, <a href="/search/physics?searchtype=author&query=Ciury%C5%82o%2C+R">Roman Ciury艂o</a>, <a href="/search/physics?searchtype=author&query=Consolati%2C+G">Giovanni Consolati</a>, <a href="/search/physics?searchtype=author&query=Doser%2C+M">Michael Doser</a>, <a href="/search/physics?searchtype=author&query=Gl%C3%B6ggler%2C+L">Lisa Gl枚ggler</a>, <a href="/search/physics?searchtype=author&query=Graczykowski%2C+%C5%81">艁ukasz Graczykowski</a>, <a href="/search/physics?searchtype=author&query=Grosbart%2C+M">Malgorzata Grosbart</a>, <a href="/search/physics?searchtype=author&query=Guatieri%2C+F">Francesco Guatieri</a>, <a href="/search/physics?searchtype=author&query=Gusakova%2C+N">Nataly Gusakova</a>, <a href="/search/physics?searchtype=author&query=Gustafsson%2C+F">Fredrik Gustafsson</a> , et al. (27 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="2402.04637v1-abstract-short" style="display: inline;"> A powerful and robust control system is a crucial, often neglected, pillar of any modern, complex physics experiment that requires the management of a multitude of different devices and their precise time synchronisation. The AEgIS collaboration presents CIRCUS, a novel, autonomous control system optimised for time-critical experiments such as those at CERN's Antiproton Decelerator and, more broad… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2402.04637v1-abstract-full').style.display = 'inline'; document.getElementById('2402.04637v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2402.04637v1-abstract-full" style="display: none;"> A powerful and robust control system is a crucial, often neglected, pillar of any modern, complex physics experiment that requires the management of a multitude of different devices and their precise time synchronisation. The AEgIS collaboration presents CIRCUS, a novel, autonomous control system optimised for time-critical experiments such as those at CERN's Antiproton Decelerator and, more broadly, in atomic and quantum physics research. Its setup is based on Sinara/ARTIQ and TALOS, integrating the ALPACA analysis pipeline, the last two developed entirely in AEgIS. It is suitable for strict synchronicity requirements and repeatable, automated operation of experiments, culminating in autonomous parameter optimisation via feedback from real-time data analysis. CIRCUS has been successfully deployed and tested in AEgIS; being experiment-agnostic and released open-source, other experiments can leverage its capabilities. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2402.04637v1-abstract-full').style.display = 'none'; document.getElementById('2402.04637v1-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 February, 2024; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> February 2024. </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2310.08760">arXiv:2310.08760</a> <span> [<a href="https://arxiv.org/pdf/2310.08760">pdf</a>, <a href="https://arxiv.org/format/2310.08760">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Atomic Physics">physics.atom-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"> Positronium laser cooling via the $1^3S$-$2^3P$ transition with a broadband laser pulse </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Gl%C3%B6ggler%2C+L+T">L. T. Gl枚ggler</a>, <a href="/search/physics?searchtype=author&query=Gusakova%2C+N">N. Gusakova</a>, <a href="/search/physics?searchtype=author&query=Rien%C3%A4cker%2C+B">B. Rien盲cker</a>, <a href="/search/physics?searchtype=author&query=Camper%2C+A">A. Camper</a>, <a href="/search/physics?searchtype=author&query=Caravita%2C+R">R. Caravita</a>, <a href="/search/physics?searchtype=author&query=Huck%2C+S">S. Huck</a>, <a href="/search/physics?searchtype=author&query=Volponi%2C+M">M. Volponi</a>, <a href="/search/physics?searchtype=author&query=Wolz%2C+T">T. Wolz</a>, <a href="/search/physics?searchtype=author&query=Penasa%2C+L">L. Penasa</a>, <a href="/search/physics?searchtype=author&query=Krumins%2C+V">V. Krumins</a>, <a href="/search/physics?searchtype=author&query=Gustafsson%2C+F">F. Gustafsson</a>, <a href="/search/physics?searchtype=author&query=Auzins%2C+M">M. Auzins</a>, <a href="/search/physics?searchtype=author&query=Bergmann%2C+B">B. Bergmann</a>, <a href="/search/physics?searchtype=author&query=Burian%2C+P">P. Burian</a>, <a href="/search/physics?searchtype=author&query=Brusa%2C+R+S">R. S. Brusa</a>, <a href="/search/physics?searchtype=author&query=Castelli%2C+F">F. Castelli</a>, <a href="/search/physics?searchtype=author&query=Ciury%C5%82o%2C+R">R. Ciury艂o</a>, <a href="/search/physics?searchtype=author&query=Comparat%2C+D">D. Comparat</a>, <a href="/search/physics?searchtype=author&query=Consolati%2C+G">G. Consolati</a>, <a href="/search/physics?searchtype=author&query=Doser%2C+M">M. Doser</a>, <a href="/search/physics?searchtype=author&query=Graczykowski%2C+%C5%81">艁. Graczykowski</a>, <a href="/search/physics?searchtype=author&query=Grosbart%2C+M">M. Grosbart</a>, <a href="/search/physics?searchtype=author&query=Guatieri%2C+F">F. Guatieri</a>, <a href="/search/physics?searchtype=author&query=Haider%2C+S">S. Haider</a>, <a href="/search/physics?searchtype=author&query=Janik%2C+M+A">M. A. Janik</a> , et al. (27 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="2310.08760v1-abstract-short" style="display: inline;"> We report on laser cooling of a large fraction of positronium (Ps) in free-flight by strongly saturating the $1^3S$-$2^3P$ transition with a broadband, long-pulsed 243 nm alexandrite laser. The ground state Ps cloud is produced in a magnetic and electric field-free environment. We observe two different laser-induced effects. The first effect is an increase in the number of atoms in the ground stat… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2310.08760v1-abstract-full').style.display = 'inline'; document.getElementById('2310.08760v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2310.08760v1-abstract-full" style="display: none;"> We report on laser cooling of a large fraction of positronium (Ps) in free-flight by strongly saturating the $1^3S$-$2^3P$ transition with a broadband, long-pulsed 243 nm alexandrite laser. The ground state Ps cloud is produced in a magnetic and electric field-free environment. We observe two different laser-induced effects. The first effect is an increase in the number of atoms in the ground state after the time Ps has spent in the long-lived $3^3P$ states. The second effect is the one-dimensional Doppler cooling of Ps, reducing the cloud's temperature from 380(20) K to 170(20) K. We demonstrate a 58(9) % increase in the coldest fraction of the Ps ensemble. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2310.08760v1-abstract-full').style.display = 'none'; document.getElementById('2310.08760v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 12 October, 2023; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> October 2023. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">6 pages, 5 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/2309.07171">arXiv:2309.07171</a> <span> [<a href="https://arxiv.org/pdf/2309.07171">pdf</a>, <a href="https://arxiv.org/format/2309.07171">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Instrumentation and Detectors">physics.ins-det</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Nuclear Experiment">nucl-ex</span> </div> </div> <p class="title is-5 mathjax"> Feasibility studies for imaging e$^{+}$e$^{-}$ annihilation with modular multi-strip detectors </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Sharma%2C+S">S. Sharma</a>, <a href="/search/physics?searchtype=author&query=Povolo%2C+L">L. Povolo</a>, <a href="/search/physics?searchtype=author&query=Mariazzi%2C+S">S. Mariazzi</a>, <a href="/search/physics?searchtype=author&query=Korcyl%2C+G">G. Korcyl</a>, <a href="/search/physics?searchtype=author&query=Kacprzak%2C+K">K. Kacprzak</a>, <a href="/search/physics?searchtype=author&query=Kumar%2C+D">D. Kumar</a>, <a href="/search/physics?searchtype=author&query=Niedzwiecki%2C+S">S. Niedzwiecki</a>, <a href="/search/physics?searchtype=author&query=Baran%2C+J">J. Baran</a>, <a href="/search/physics?searchtype=author&query=Beyene%2C+E">E. Beyene</a>, <a href="/search/physics?searchtype=author&query=Brusa%2C+R+S">R. S. Brusa</a>, <a href="/search/physics?searchtype=author&query=Caravita%2C+R">R. Caravita</a>, <a href="/search/physics?searchtype=author&query=Chug%2C+N">N. Chug</a>, <a href="/search/physics?searchtype=author&query=Coussat%2C+A">A. Coussat</a>, <a href="/search/physics?searchtype=author&query=Curceanu%2C+C">C. Curceanu</a>, <a href="/search/physics?searchtype=author&query=Czerwinski%2C+E">E. Czerwinski</a>, <a href="/search/physics?searchtype=author&query=Dadgar%2C+M">M. Dadgar</a>, <a href="/search/physics?searchtype=author&query=Das%2C+M">M. Das</a>, <a href="/search/physics?searchtype=author&query=Dulski%2C+K">K. Dulski</a>, <a href="/search/physics?searchtype=author&query=Eliyan%2C+K">K. Eliyan</a>, <a href="/search/physics?searchtype=author&query=Gajos%2C+A">A. Gajos</a>, <a href="/search/physics?searchtype=author&query=Gupta%2C+N">N. Gupta</a>, <a href="/search/physics?searchtype=author&query=Hiesmayr%2C+B+C">B. C. Hiesmayr</a>, <a href="/search/physics?searchtype=author&query=Kaplon%2C+L">L. Kaplon</a>, <a href="/search/physics?searchtype=author&query=Kaplanoglu%2C+T">T. Kaplanoglu</a>, <a href="/search/physics?searchtype=author&query=Klimaszewski%2C+K">K. Klimaszewski</a> , et al. (19 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="2309.07171v1-abstract-short" style="display: inline;"> Studies based on imaging the annihilation of the electron (e$^{-}$) and its antiparticle positron (e$^{+}$) open up several interesting applications in nuclear medicine and fundamental research. The annihilation process involves both the direct conversion of e$^{+}$e$^{-}$ into photons and the formation of their atomically bound state, the positronium atom (Ps), which can be used as a probe for fu… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2309.07171v1-abstract-full').style.display = 'inline'; document.getElementById('2309.07171v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2309.07171v1-abstract-full" style="display: none;"> Studies based on imaging the annihilation of the electron (e$^{-}$) and its antiparticle positron (e$^{+}$) open up several interesting applications in nuclear medicine and fundamental research. The annihilation process involves both the direct conversion of e$^{+}$e$^{-}$ into photons and the formation of their atomically bound state, the positronium atom (Ps), which can be used as a probe for fundamental studies. With the ability to produce large quantities of Ps, manipulate them in long-lived Ps states, and image their annihilations after a free fall or after passing through atomic interferometers, this purely leptonic antimatter system can be used to perform inertial sensing studies in view of a direct test of Einstein equivalence principle. It is envisioned that modular multistrip detectors can be exploited as potential detection units for this kind of studies. In this work, we report the results of the first feasibility study performed on a e$^{+}$ beamline using two detection modules to evaluate their reconstruction performance and spatial resolution for imaging e$^{+}$e$^{-}$ annihilations and thus their applicability for gravitational studies of Ps. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2309.07171v1-abstract-full').style.display = 'none'; document.getElementById('2309.07171v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 12 September, 2023; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> September 2023. </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2301.02832">arXiv:2301.02832</a> <span> [<a href="https://arxiv.org/pdf/2301.02832">pdf</a>, <a href="https://arxiv.org/format/2301.02832">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Instrumentation and Detectors">physics.ins-det</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1088/1748-0221/18/02/C02027">10.1088/1748-0221/18/02/C02027 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> J-PET detection modules based on plastic scintillators for performing studies with positron and positronium beams </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Sharma%2C+S">S. Sharma</a>, <a href="/search/physics?searchtype=author&query=Baran%2C+J">J. Baran</a>, <a href="/search/physics?searchtype=author&query=Brusa%2C+R+S">R. S. Brusa</a>, <a href="/search/physics?searchtype=author&query=Caravita%2C+R">R. Caravita</a>, <a href="/search/physics?searchtype=author&query=Chug%2C+N">N. Chug</a>, <a href="/search/physics?searchtype=author&query=Coussat%2C+A">A. Coussat</a>, <a href="/search/physics?searchtype=author&query=Curceanu%2C+C">C. Curceanu</a>, <a href="/search/physics?searchtype=author&query=Czerwinski%2C+E">E. Czerwinski</a>, <a href="/search/physics?searchtype=author&query=Dadgar%2C+M">M. Dadgar</a>, <a href="/search/physics?searchtype=author&query=Dulski%2C+K">K. Dulski</a>, <a href="/search/physics?searchtype=author&query=Eliyan%2C+K">K. Eliyan</a>, <a href="/search/physics?searchtype=author&query=Gajos%2C+A">A. Gajos</a>, <a href="/search/physics?searchtype=author&query=Hiesmayr%2C+B+C">B. C. Hiesmayr</a>, <a href="/search/physics?searchtype=author&query=Kacprzak%2C+K">K. Kacprzak</a>, <a href="/search/physics?searchtype=author&query=Kaplon%2C+L">L. Kaplon</a>, <a href="/search/physics?searchtype=author&query=Klimaszewski%2C+K">K. Klimaszewski</a>, <a href="/search/physics?searchtype=author&query=Konieczka%2C+P">P. Konieczka</a>, <a href="/search/physics?searchtype=author&query=Korcyl%2C+G">G. Korcyl</a>, <a href="/search/physics?searchtype=author&query=Kozik%2C+T">T. Kozik</a>, <a href="/search/physics?searchtype=author&query=Krzemien%2C+W">W. Krzemien</a>, <a href="/search/physics?searchtype=author&query=Kumar%2C+D">D. Kumar</a>, <a href="/search/physics?searchtype=author&query=Mariazzi%2C+S">S. Mariazzi</a>, <a href="/search/physics?searchtype=author&query=Niedzwiecki%2C+S">S. Niedzwiecki</a>, <a href="/search/physics?searchtype=author&query=Panasa%2C+L">L. Panasa</a>, <a href="/search/physics?searchtype=author&query=Parzych%2C+S">S. Parzych</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="2301.02832v1-abstract-short" style="display: inline;"> The J-PET detector, which consists of inexpensive plastic scintillators, has demonstrated its potential in the study of fundamental physics. In recent years, a prototype with 192 plastic scintillators arranged in 3 layers has been optimized for the study of positronium decays. This allows performing precision tests of discrete symmetries (C, P, T) in the decays of positronium atoms. Moreover, than… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2301.02832v1-abstract-full').style.display = 'inline'; document.getElementById('2301.02832v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2301.02832v1-abstract-full" style="display: none;"> The J-PET detector, which consists of inexpensive plastic scintillators, has demonstrated its potential in the study of fundamental physics. In recent years, a prototype with 192 plastic scintillators arranged in 3 layers has been optimized for the study of positronium decays. This allows performing precision tests of discrete symmetries (C, P, T) in the decays of positronium atoms. Moreover, thanks to the possibility of measuring the polarization direction of the photon based on Compton scattering, the predicted entanglement between the linear polarization of annihilation photons in positronium decays can also be studied. Recently, a new J-PET prototype was commissioned, based on a modular design of detection units. Each module consists of 13 plastic scintillators and can be used as a stand-alone, compact and portable detection unit. In this paper, the main features of the J-PET detector, the modular prototype and their applications for possible studies with positron and positronium beams are discussed. Preliminary results of the first test experiment performed on two detection units in the continuous positron beam recently developed at the Antimatter Laboratory (AML) of Trento are also reported. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2301.02832v1-abstract-full').style.display = 'none'; document.getElementById('2301.02832v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 7 January, 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/2203.03055">arXiv:2203.03055</a> <span> [<a href="https://arxiv.org/pdf/2203.03055">pdf</a>, <a href="https://arxiv.org/format/2203.03055">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="Atomic Physics">physics.atom-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.2020.163637">10.1016/j.nima.2020.163637 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> A cryogenic tracking detector for antihydrogen detection in the AEgIS experiment </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Amsler%2C+C">C. Amsler</a>, <a href="/search/physics?searchtype=author&query=Antonello%2C+M">M. Antonello</a>, <a href="/search/physics?searchtype=author&query=Belov%2C+A">A. Belov</a>, <a href="/search/physics?searchtype=author&query=Bonomi%2C+G">G. Bonomi</a>, <a href="/search/physics?searchtype=author&query=Brusa%2C+R+S">R. S. Brusa</a>, <a href="/search/physics?searchtype=author&query=Caccia%2C+M">M. Caccia</a>, <a href="/search/physics?searchtype=author&query=Camper%2C+A">A. Camper</a>, <a href="/search/physics?searchtype=author&query=Caravita%2C+R">R. Caravita</a>, <a href="/search/physics?searchtype=author&query=Castelli%2C+F">F. Castelli</a>, <a href="/search/physics?searchtype=author&query=Comparat%2C+D">D. Comparat</a>, <a href="/search/physics?searchtype=author&query=Consolati%2C+G">G. Consolati</a>, <a href="/search/physics?searchtype=author&query=Demetrio%2C+A">A. Demetrio</a>, <a href="/search/physics?searchtype=author&query=Di+Noto%2C+L">L. Di Noto</a>, <a href="/search/physics?searchtype=author&query=Doser%2C+M">M. Doser</a>, <a href="/search/physics?searchtype=author&query=Ekman%2C+P+A">P. A. Ekman</a>, <a href="/search/physics?searchtype=author&query=Fani%2C+M">M. Fani</a>, <a href="/search/physics?searchtype=author&query=Ferragut%2C+R">R. Ferragut</a>, <a href="/search/physics?searchtype=author&query=Gerber%2C+S">S. Gerber</a>, <a href="/search/physics?searchtype=author&query=Giammarchi%2C+M">M. Giammarchi</a>, <a href="/search/physics?searchtype=author&query=Gligorova%2C+A">A. Gligorova</a>, <a href="/search/physics?searchtype=author&query=Guatieri%2C+F">F. Guatieri</a>, <a href="/search/physics?searchtype=author&query=Hackstock%2C+P">P. Hackstock</a>, <a href="/search/physics?searchtype=author&query=Haider%2C+D">D. Haider</a>, <a href="/search/physics?searchtype=author&query=Haider%2C+S">S. Haider</a>, <a href="/search/physics?searchtype=author&query=Hinterberger%2C+A">A. Hinterberger</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="2203.03055v1-abstract-short" style="display: inline;"> We present the commissioning of the Fast Annihilation Cryogenic Tracker detector (FACT), installed around the antihydrogen production trap inside the 1 T superconducting magnet of the AEgIS experiment. FACT is designed to detect pions originating from the annihilation of antiprotons. Its 794 scintillating fibers operate at 4 K and are read out by silicon photomultipliers (MPPCs) at near room tempe… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2203.03055v1-abstract-full').style.display = 'inline'; document.getElementById('2203.03055v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2203.03055v1-abstract-full" style="display: none;"> We present the commissioning of the Fast Annihilation Cryogenic Tracker detector (FACT), installed around the antihydrogen production trap inside the 1 T superconducting magnet of the AEgIS experiment. FACT is designed to detect pions originating from the annihilation of antiprotons. Its 794 scintillating fibers operate at 4 K and are read out by silicon photomultipliers (MPPCs) at near room temperature. FACT provides the antiproton/antihydrogen annihilation position information with a few ns timing resolution. We present the hardware and software developments which led to the successful operation of the detector for antihydrogen detection and the results of an antiproton-loss based efficiency assessment. The main background to the antihydrogen signal is that of the positrons impinging onto the positronium conversion target and creating a large amount of gamma rays which produce a sizeable signal in the MPPCs shortly before the antihydrogen signal is expected. We detail the characterization of this background signal and its impact on the antihydrogen detection efficiency. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2203.03055v1-abstract-full').style.display = 'none'; document.getElementById('2203.03055v1-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 March, 2022; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> March 2022. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> NIM A, Volume 960, 21 April 2020, 163637 </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2203.02920">arXiv:2203.02920</a> <span> [<a href="https://arxiv.org/pdf/2203.02920">pdf</a>, <a href="https://arxiv.org/format/2203.02920">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Atomic Physics">physics.atom-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/epjd/e2020-100585-8">10.1140/epjd/e2020-100585-8 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Toward inertial sensing with a monochromatic $ 2^3 S $ positronium beam </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Mariazzi%2C+S">Sebastiano Mariazzi</a>, <a href="/search/physics?searchtype=author&query=Caravita%2C+R">Ruggero Caravita</a>, <a href="/search/physics?searchtype=author&query=Doser%2C+M">Michael Doser</a>, <a href="/search/physics?searchtype=author&query=Nebbia%2C+G">Giancarlo Nebbia</a>, <a href="/search/physics?searchtype=author&query=Brusa%2C+R+S">Roberto S. Brusa</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="2203.02920v1-abstract-short" style="display: inline;"> In this work, we discuss the possibility of inertial sensing with positronium in the $2^3 S$ metastable state for the measurement of optical dipole, relativistic and gravitational forces on a purely leptonic matter-antimatter system. Starting from the characteristics of an available $2^3 S$ beam, we estimate the time necessary to measure accelerations ranging from $\sim10^5$ $m/s^2$ to 9.1… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2203.02920v1-abstract-full').style.display = 'inline'; document.getElementById('2203.02920v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2203.02920v1-abstract-full" style="display: none;"> In this work, we discuss the possibility of inertial sensing with positronium in the $2^3 S$ metastable state for the measurement of optical dipole, relativistic and gravitational forces on a purely leptonic matter-antimatter system. Starting from the characteristics of an available $2^3 S$ beam, we estimate the time necessary to measure accelerations ranging from $\sim10^5$ $m/s^2$ to 9.1 $m/s^2$ with two different inertial sensitive devices: a classical moir茅 deflectometer and a Mach-Zehnder interferometer. The sensitivity of the Mach-Zehnder interferometer has been estimated to be several tens of times better than that of the moir茅 deflectometer, for the same measurement time.\\ Different strategies to strengthen the $2^3 S$ beam flux and to improve the sensitivity of the devices are proposed and analyzed. Among them, the most promising are reducing the divergence of the positronium beam through 2D laser Doppler cooling and coherent positronium Raman excitation from the ground state to the $2^3 S$ level. If implemented, these improvements promise to result in the time required to measure an acceleration of 9.1 $m/s^2$ of few weeks and 100 $m/s^2$ of a few hours. Different detection schemes for resolving the fringe pattern shift generated on $2^3 S$ positronium crossing the deflectometer/interferometer are also discussed. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2203.02920v1-abstract-full').style.display = 'none'; document.getElementById('2203.02920v1-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 March, 2022; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> March 2022. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Eur.Phys.J.D 74 (2020) 4, 79 </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2111.01503">arXiv:2111.01503</a> <span> [<a href="https://arxiv.org/pdf/2111.01503">pdf</a>, <a href="https://arxiv.org/format/2111.01503">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.2021.166275">10.1016/j.nima.2021.166275 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> A fiber detector to monitor ortho-Ps formation and decay </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Rien%C3%A4cker%2C+B">Benjamin Rien盲cker</a>, <a href="/search/physics?searchtype=author&query=Brusa%2C+R+S">Roberto Sennen Brusa</a>, <a href="/search/physics?searchtype=author&query=Caravita%2C+R">Ruggero Caravita</a>, <a href="/search/physics?searchtype=author&query=Mariazzi%2C+S">Sebastiano Mariazzi</a>, <a href="/search/physics?searchtype=author&query=Pino%2C+F">Felix Pino</a>, <a href="/search/physics?searchtype=author&query=Ranum%2C+O+A">Oline Aas Ranum</a>, <a href="/search/physics?searchtype=author&query=Nebbia%2C+G">Giancarlo Nebbia</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="2111.01503v1-abstract-short" style="display: inline;"> We describe a novel method to use a scintillating fiber detector similar to the Fast Annihilation Cryogenic Tracking (FACT) used at the antimatter experiment AEgIS to monitor the presence of ortho-positronium. A single scintillating fiber was coupled to a photomultiplier tube and irradiated by flashes of about $6\cdot10^6$ $511\,\text{keV}$ $纬$-rays produced by $\approx10\,\text{ns}$ long positron… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2111.01503v1-abstract-full').style.display = 'inline'; document.getElementById('2111.01503v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2111.01503v1-abstract-full" style="display: none;"> We describe a novel method to use a scintillating fiber detector similar to the Fast Annihilation Cryogenic Tracking (FACT) used at the antimatter experiment AEgIS to monitor the presence of ortho-positronium. A single scintillating fiber was coupled to a photomultiplier tube and irradiated by flashes of about $6\cdot10^6$ $511\,\text{keV}$ $纬$-rays produced by $\approx10\,\text{ns}$ long positron pulses. The results were used to demonstrate the ability to track the creation and annihilation of ortho-positronium atoms over time in cryogenic and highly magnetic environments by using the FACT detector as a "digital calorimeter". <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2111.01503v1-abstract-full').style.display = 'none'; document.getElementById('2111.01503v1-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 November, 2021; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> November 2021. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">6 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/1911.04342">arXiv:1911.04342</a> <span> [<a href="https://arxiv.org/pdf/1911.04342">pdf</a>, <a href="https://arxiv.org/format/1911.04342">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Atomic Physics">physics.atom-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/10.1103/PhysRevA.102.013101">10.1103/PhysRevA.102.013101 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Rydberg-positronium velocity and self-ionization studies in 1T magnetic field and cryogenic environment </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Antonello%2C+M">M. Antonello</a>, <a href="/search/physics?searchtype=author&query=Belov%2C+A">A. Belov</a>, <a href="/search/physics?searchtype=author&query=Brusa%2C+G+B+R+S">G. Bonomi R. S. Brusa</a>, <a href="/search/physics?searchtype=author&query=Caccia%2C+M">M. Caccia</a>, <a href="/search/physics?searchtype=author&query=Camper%2C+A">A. Camper</a>, <a href="/search/physics?searchtype=author&query=Caravita%2C+R">R. Caravita</a>, <a href="/search/physics?searchtype=author&query=Castelli%2C+F">F. Castelli</a>, <a href="/search/physics?searchtype=author&query=Comparat%2C+D">D. Comparat</a>, <a href="/search/physics?searchtype=author&query=Consolati%2C+G">G. Consolati</a>, <a href="/search/physics?searchtype=author&query=Di+Noto%2C+L">L. Di Noto</a>, <a href="/search/physics?searchtype=author&query=Doser%2C+M">M. Doser</a>, <a href="/search/physics?searchtype=author&query=Fani%2C+M">M. Fani</a>, <a href="/search/physics?searchtype=author&query=Ferragut%2C+R">R. Ferragut</a>, <a href="/search/physics?searchtype=author&query=Fesel%2C+J">J. Fesel</a>, <a href="/search/physics?searchtype=author&query=Gerber%2C+S">S. Gerber</a>, <a href="/search/physics?searchtype=author&query=Gligorova%2C+A">A. Gligorova</a>, <a href="/search/physics?searchtype=author&query=Gl%C3%B6ggler%2C+L+T">L. T. Gl枚ggler</a>, <a href="/search/physics?searchtype=author&query=Guatieri%2C+F">F. Guatieri</a>, <a href="/search/physics?searchtype=author&query=Haider%2C+S">S. Haider</a>, <a href="/search/physics?searchtype=author&query=Hinterberger%2C+A">A. Hinterberger</a>, <a href="/search/physics?searchtype=author&query=Khalidova%2C+O">O. Khalidova</a>, <a href="/search/physics?searchtype=author&query=Krasnicky%2C+D">D. Krasnicky</a>, <a href="/search/physics?searchtype=author&query=Lagomarsino%2C+V">V. Lagomarsino</a>, <a href="/search/physics?searchtype=author&query=Malbrunot%2C+C">C. Malbrunot</a>, <a href="/search/physics?searchtype=author&query=Mariazzi%2C+S">S. Mariazzi</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="1911.04342v5-abstract-short" style="display: inline;"> We characterized the pulsed Rydberg-positronium production inside the AEgIS (Antimatter Experiment: Gravity, Interferometry, Spectroscopy) apparatus in view of antihydrogen formation by means of a charge exchange reaction between cold antiprotons and slow Rydberg-positronium atoms. Velocity measurements on positronium along two axes in a cryogenic environment (10K) and in 1T magnetic field were pe… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1911.04342v5-abstract-full').style.display = 'inline'; document.getElementById('1911.04342v5-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1911.04342v5-abstract-full" style="display: none;"> We characterized the pulsed Rydberg-positronium production inside the AEgIS (Antimatter Experiment: Gravity, Interferometry, Spectroscopy) apparatus in view of antihydrogen formation by means of a charge exchange reaction between cold antiprotons and slow Rydberg-positronium atoms. Velocity measurements on positronium along two axes in a cryogenic environment (10K) and in 1T magnetic field were performed. The velocimetry was done by MCP-imaging of photoionized positronium previously excited to the $n=3$ state. One direction of velocity was measured via Doppler-scan of this $n=3$-line, another direction perpendicular to the former by delaying the exciting laser pulses in a time-of-flight measurement. Self-ionization in the magnetic field due to motional Stark effect was also quantified by using the same MCP-imaging technique for Rydberg positronium with an effective principal quantum number $n_{eff}$ ranging between 14 and 22. We conclude with a discussion about the optimization of our experimental parameters for creating Rydberg-positronium in preparation for an efficient pulsed production of antihydrogen. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1911.04342v5-abstract-full').style.display = 'none'; document.getElementById('1911.04342v5-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 22 February, 2022; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 11 November, 2019; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> November 2019. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Phys. Rev. A 102, 013101 (2020) </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1904.09004">arXiv:1904.09004</a> <span> [<a href="https://arxiv.org/pdf/1904.09004">pdf</a>, <a href="https://arxiv.org/format/1904.09004">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Atomic Physics">physics.atom-ph</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/10.1103/PhysRevA.100.063414">10.1103/PhysRevA.100.063414 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Efficient $2^3S$ positronium production by stimulated decay from the $3^3P$ level </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Antonello%2C+M">M. Antonello</a>, <a href="/search/physics?searchtype=author&query=Belov%2C+A">A. Belov</a>, <a href="/search/physics?searchtype=author&query=Bonomi%2C+G">G. Bonomi</a>, <a href="/search/physics?searchtype=author&query=Brusa%2C+R+S">R. S. Brusa</a>, <a href="/search/physics?searchtype=author&query=Caccia%2C+M">M. Caccia</a>, <a href="/search/physics?searchtype=author&query=Camper%2C+A">A. Camper</a>, <a href="/search/physics?searchtype=author&query=Caravita%2C+R">R. Caravita</a>, <a href="/search/physics?searchtype=author&query=Castelli%2C+F">F. Castelli</a>, <a href="/search/physics?searchtype=author&query=Cerchiari%2C+G">G. Cerchiari</a>, <a href="/search/physics?searchtype=author&query=Comparat%2C+D">D. Comparat</a>, <a href="/search/physics?searchtype=author&query=Consolati%2C+G">G. Consolati</a>, <a href="/search/physics?searchtype=author&query=Demetrio%2C+A">A. Demetrio</a>, <a href="/search/physics?searchtype=author&query=Di+Noto%2C+L">L. Di Noto</a>, <a href="/search/physics?searchtype=author&query=Doser%2C+M">M. Doser</a>, <a href="/search/physics?searchtype=author&query=Fan%C3%AC%2C+M">M. Fan矛</a>, <a href="/search/physics?searchtype=author&query=Gerber%2C+S">S. Gerber</a>, <a href="/search/physics?searchtype=author&query=Gligorova%2C+A">A. Gligorova</a>, <a href="/search/physics?searchtype=author&query=Guatieri%2C+F">F. Guatieri</a>, <a href="/search/physics?searchtype=author&query=Hackstock%2C+P">P. Hackstock</a>, <a href="/search/physics?searchtype=author&query=Haider%2C+S">S. Haider</a>, <a href="/search/physics?searchtype=author&query=Hinterberger%2C+A">A. Hinterberger</a>, <a href="/search/physics?searchtype=author&query=Kellerbauer%2C+A">A. Kellerbauer</a>, <a href="/search/physics?searchtype=author&query=Khalidova%2C+O">O. Khalidova</a>, <a href="/search/physics?searchtype=author&query=Krasnicky%2C+D">D. Krasnicky</a>, <a href="/search/physics?searchtype=author&query=Lagomarsino%2C+V">V. Lagomarsino</a> , et al. (26 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="1904.09004v1-abstract-short" style="display: inline;"> We investigate experimentally the possibility of enhancing the production of $2^3S$ positronium atoms by driving the $1^3S$-$3^3P$ and $3^3P$-$2^3S$ transitions, overcoming the natural branching ratio limitation of spontaneous decay from $3^3P$ to $2^3S$. The decay of $3^3P$ positronium atoms towards the $2^3S$ level has been effciently stimulated by a 1312.2nm broadband IR laser pulse. The depend… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1904.09004v1-abstract-full').style.display = 'inline'; document.getElementById('1904.09004v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1904.09004v1-abstract-full" style="display: none;"> We investigate experimentally the possibility of enhancing the production of $2^3S$ positronium atoms by driving the $1^3S$-$3^3P$ and $3^3P$-$2^3S$ transitions, overcoming the natural branching ratio limitation of spontaneous decay from $3^3P$ to $2^3S$. The decay of $3^3P$ positronium atoms towards the $2^3S$ level has been effciently stimulated by a 1312.2nm broadband IR laser pulse. The dependence of the stimulating transition efficiency on the intensity of the IR pulse has been measured to find the optimal enhancement conditions. A maximum relative increase of $ \times (3.1 \pm 1.0) $ in the $2^3S$ production efficiency, with respect to the case where only spontaneous decay is present, was obtained. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1904.09004v1-abstract-full').style.display = 'none'; document.getElementById('1904.09004v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 18 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">6 pages, 4 figures</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Phys. Rev. A 100, 063414 (2019) </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1808.01808">arXiv:1808.01808</a> <span> [<a href="https://arxiv.org/pdf/1808.01808">pdf</a>, <a href="https://arxiv.org/format/1808.01808">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Atomic Physics">physics.atom-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/10.1103/PhysRevA.99.033405">10.1103/PhysRevA.99.033405 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Velocity selected production of $2^3S$ metastable positronium </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Amsler%2C+C">C. Amsler</a>, <a href="/search/physics?searchtype=author&query=Antonello%2C+M">M. Antonello</a>, <a href="/search/physics?searchtype=author&query=Belov%2C+A">A. Belov</a>, <a href="/search/physics?searchtype=author&query=Bonomi%2C+G">G. Bonomi</a>, <a href="/search/physics?searchtype=author&query=Brusa%2C+R+S">R. S. Brusa</a>, <a href="/search/physics?searchtype=author&query=Caccia%2C+M">M. Caccia</a>, <a href="/search/physics?searchtype=author&query=Camper%2C+A">A. Camper</a>, <a href="/search/physics?searchtype=author&query=Caravita%2C+R">R. Caravita</a>, <a href="/search/physics?searchtype=author&query=Castelli%2C+F">F. Castelli</a>, <a href="/search/physics?searchtype=author&query=Cerchiari%2C+G">G. Cerchiari</a>, <a href="/search/physics?searchtype=author&query=Comparat%2C+D">D. Comparat</a>, <a href="/search/physics?searchtype=author&query=Consolati%2C+G">G. Consolati</a>, <a href="/search/physics?searchtype=author&query=Demetrio%2C+A">A. Demetrio</a>, <a href="/search/physics?searchtype=author&query=Di+Noto%2C+L">L. Di Noto</a>, <a href="/search/physics?searchtype=author&query=Doser%2C+M">M. Doser</a>, <a href="/search/physics?searchtype=author&query=Fan%C3%AC%2C+M">M. Fan矛</a>, <a href="/search/physics?searchtype=author&query=Gerber%2C+S">S. Gerber</a>, <a href="/search/physics?searchtype=author&query=Gligorova%2C+A">A. Gligorova</a>, <a href="/search/physics?searchtype=author&query=Guatieri%2C+F">F. Guatieri</a>, <a href="/search/physics?searchtype=author&query=Hackstock%2C+P">P. Hackstock</a>, <a href="/search/physics?searchtype=author&query=Haider%2C+S">S. Haider</a>, <a href="/search/physics?searchtype=author&query=Hinterberger%2C+A">A. Hinterberger</a>, <a href="/search/physics?searchtype=author&query=Holmestad%2C+H">H. Holmestad</a>, <a href="/search/physics?searchtype=author&query=Kellerbauer%2C+A">A. Kellerbauer</a>, <a href="/search/physics?searchtype=author&query=Khalidova%2C+O">O. Khalidova</a> , et al. (30 additional authors not shown) </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="1808.01808v2-abstract-short" style="display: inline;"> Positronium in the $2^3S$ metastable state exhibits a low electrical polarizability and a long lifetime (1140 ns) making it a promising candidate for interferometry experiments with a neutral matter-antimatter system. In the present work, $2^3S$ positronium is produced - in absence of electric field - via spontaneous radiative decay from the $3^3P$ level populated with a 205nm UV laser pulse. Than… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1808.01808v2-abstract-full').style.display = 'inline'; document.getElementById('1808.01808v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1808.01808v2-abstract-full" style="display: none;"> Positronium in the $2^3S$ metastable state exhibits a low electrical polarizability and a long lifetime (1140 ns) making it a promising candidate for interferometry experiments with a neutral matter-antimatter system. In the present work, $2^3S$ positronium is produced - in absence of electric field - via spontaneous radiative decay from the $3^3P$ level populated with a 205nm UV laser pulse. Thanks to the short temporal length of the pulse, 1.5 ns full-width at half maximum, different velocity populations of a positronium cloud emitted from a nanochannelled positron/positronium converter were selected by delaying the excitation pulse with respect to the production instant. $ 2^3S $ positronium atoms with velocity tuned between $ 7 \cdot 10^4 $ m/s and $ 10 \cdot 10^4 $ m/s were thus produced. Depending on the selected velocity, a $2^3S$ production effciency ranging from $\sim 0.8 \%$ to $\sim 1.7%$, with respect to the total amount of emitted positronium, was obtained. The observed results give a branching ratio for the $3^3P$-$2^3S$ spontaneous decay of $(9.7 \pm 2.7) \% $. The present velocity selection technique could allow to produce an almost monochromatic beam of $\sim 1 \cdot 10^3 $ $2^3S$ atoms with a velocity spread $ < 10^4 $ m/s and an angular divergence of $\sim$ 50 mrad. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1808.01808v2-abstract-full').style.display = 'none'; document.getElementById('1808.01808v2-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 18 April, 2019; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 6 August, 2018; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> August 2018. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">6 pages, 3 figures, 1 table</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Phys. Rev. A 99, 033405 (2019) </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1802.07012">arXiv:1802.07012</a> <span> [<a href="https://arxiv.org/pdf/1802.07012">pdf</a>, <a href="https://arxiv.org/format/1802.07012">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Atomic Physics">physics.atom-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/10.1103/PhysRevA.98.013402">10.1103/PhysRevA.98.013402 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Producing long-lived $2^3\text{S}$ Ps via $3^3\text{P}$ laser excitation in magnetic and electric fields </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Aghion%2C+S">S. Aghion</a>, <a href="/search/physics?searchtype=author&query=Amsler%2C+C">C. Amsler</a>, <a href="/search/physics?searchtype=author&query=Antonello%2C+M">M. Antonello</a>, <a href="/search/physics?searchtype=author&query=Belov%2C+A">A. Belov</a>, <a href="/search/physics?searchtype=author&query=Bonomi%2C+G">G. Bonomi</a>, <a href="/search/physics?searchtype=author&query=Brusa%2C+R+S">R. S. Brusa</a>, <a href="/search/physics?searchtype=author&query=Caccia%2C+M">M. Caccia</a>, <a href="/search/physics?searchtype=author&query=Camper%2C+A">A. Camper</a>, <a href="/search/physics?searchtype=author&query=Caravita%2C+R">R. Caravita</a>, <a href="/search/physics?searchtype=author&query=Castelli%2C+F">F. Castelli</a>, <a href="/search/physics?searchtype=author&query=Cerchiari%2C+G">G. Cerchiari</a>, <a href="/search/physics?searchtype=author&query=Comparat%2C+D">D. Comparat</a>, <a href="/search/physics?searchtype=author&query=Consolati%2C+G">G. Consolati</a>, <a href="/search/physics?searchtype=author&query=Demetrio%2C+A">A. Demetrio</a>, <a href="/search/physics?searchtype=author&query=Di+Noto%2C+L">L. Di Noto</a>, <a href="/search/physics?searchtype=author&query=Doser%2C+M">M. Doser</a>, <a href="/search/physics?searchtype=author&query=Evans%2C+C">C. Evans</a>, <a href="/search/physics?searchtype=author&query=Fani%2C+M">M. Fani</a>, <a href="/search/physics?searchtype=author&query=Ferragut%2C+R">R. Ferragut</a>, <a href="/search/physics?searchtype=author&query=Fesel%2C+J">J. Fesel</a>, <a href="/search/physics?searchtype=author&query=Fontana%2C+A">A. Fontana</a>, <a href="/search/physics?searchtype=author&query=Gerber%2C+S">S. Gerber</a>, <a href="/search/physics?searchtype=author&query=Giammarchi%2C+M">M. Giammarchi</a>, <a href="/search/physics?searchtype=author&query=Gligorova%2C+A">A. Gligorova</a>, <a href="/search/physics?searchtype=author&query=Guatieri%2C+F">F. Guatieri</a> , et al. (40 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="1802.07012v1-abstract-short" style="display: inline;"> Producing positronium (Ps) in the metastable $2^3\text{S}$ state is of interest for various applications in fundamental physics. We report here about an experiment in which Ps atoms are produced in this long-lived state by spontaneous radiative decay of Ps excited to the $3^3\text{P}$ level manifold. The Ps cloud excitation is obtained with a UV laser pulse in an experimental vacuum chamber in pre… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1802.07012v1-abstract-full').style.display = 'inline'; document.getElementById('1802.07012v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1802.07012v1-abstract-full" style="display: none;"> Producing positronium (Ps) in the metastable $2^3\text{S}$ state is of interest for various applications in fundamental physics. We report here about an experiment in which Ps atoms are produced in this long-lived state by spontaneous radiative decay of Ps excited to the $3^3\text{P}$ level manifold. The Ps cloud excitation is obtained with a UV laser pulse in an experimental vacuum chamber in presence of guiding magnetic field of 25 mT and an average electric field of 300 V/cm. The indication of the $2^3\text{S}$ state production is obtained from a novel analysis technique of single-shot positronium annihilation lifetime spectra. Its production efficiency relative to the total amount of formed Ps is evaluated by fitting a simple rate equations model to the experimental data and found to be $ (2.1 \pm 1.3) \, \% $. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1802.07012v1-abstract-full').style.display = 'none'; document.getElementById('1802.07012v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 20 February, 2018; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> February 2018. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Phys. Rev. A 98, 013402 (2018) </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1701.06306">arXiv:1701.06306</a> <span> [<a href="https://arxiv.org/pdf/1701.06306">pdf</a>, <a href="https://arxiv.org/format/1701.06306">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/10.1088/1748-0221/12/04/P04021">10.1088/1748-0221/12/04/P04021 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Measurement of antiproton annihilation on Cu, Ag and Au with emulsion films </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Aghion%2C+S">S. Aghion</a>, <a href="/search/physics?searchtype=author&query=Amsler%2C+C">C. Amsler</a>, <a href="/search/physics?searchtype=author&query=Ariga%2C+A">A. Ariga</a>, <a href="/search/physics?searchtype=author&query=Ariga%2C+T">T. Ariga</a>, <a href="/search/physics?searchtype=author&query=Bonomi%2C+G">G. Bonomi</a>, <a href="/search/physics?searchtype=author&query=Braunig%2C+P">P. Braunig</a>, <a href="/search/physics?searchtype=author&query=Brusa%2C+R+S">R. S. Brusa</a>, <a href="/search/physics?searchtype=author&query=Cabaret%2C+L">L. Cabaret</a>, <a href="/search/physics?searchtype=author&query=Caccia%2C+M">M. Caccia</a>, <a href="/search/physics?searchtype=author&query=Caravita%2C+R">R. Caravita</a>, <a href="/search/physics?searchtype=author&query=Castelli%2C+F">F. Castelli</a>, <a href="/search/physics?searchtype=author&query=Cerchiari%2C+G">G. Cerchiari</a>, <a href="/search/physics?searchtype=author&query=Comparat%2C+D">D. Comparat</a>, <a href="/search/physics?searchtype=author&query=Consolati%2C+G">G. Consolati</a>, <a href="/search/physics?searchtype=author&query=Demetrio%2C+A">A. Demetrio</a>, <a href="/search/physics?searchtype=author&query=Di+Noto%2C+L">L. Di Noto</a>, <a href="/search/physics?searchtype=author&query=Doser%2C+M">M. Doser</a>, <a href="/search/physics?searchtype=author&query=Ereditato%2C+A">A. Ereditato</a>, <a href="/search/physics?searchtype=author&query=Evans%2C+C">C. Evans</a>, <a href="/search/physics?searchtype=author&query=Ferragut%2C+R">R. Ferragut</a>, <a href="/search/physics?searchtype=author&query=Fesel%2C+J">J. Fesel</a>, <a href="/search/physics?searchtype=author&query=Fontana%2C+A">A. Fontana</a>, <a href="/search/physics?searchtype=author&query=Gerber%2C+S">S. Gerber</a>, <a href="/search/physics?searchtype=author&query=Giammarchi%2C+M">M. Giammarchi</a>, <a href="/search/physics?searchtype=author&query=Gligorova%2C+A">A. Gligorova</a> , et al. (47 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="1701.06306v2-abstract-short" style="display: inline;"> The characteristics of low energy antiproton annihilations on nuclei (e.g. hadronization and product multiplicities) are not well known, and Monte Carlo simulation packages that use different models provide different descriptions of the annihilation events. In this study, we measured the particle multiplicities resulting from antiproton annihilations on nuclei. The results were compared with predi… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1701.06306v2-abstract-full').style.display = 'inline'; document.getElementById('1701.06306v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1701.06306v2-abstract-full" style="display: none;"> The characteristics of low energy antiproton annihilations on nuclei (e.g. hadronization and product multiplicities) are not well known, and Monte Carlo simulation packages that use different models provide different descriptions of the annihilation events. In this study, we measured the particle multiplicities resulting from antiproton annihilations on nuclei. The results were compared with predictions obtained using different models in the simulation tools GEANT4 and FLUKA. For this study, we exposed thin targets (Cu, Ag and Au) to a very low energy antiproton beam from CERN's Antiproton Decelerator, exploiting the secondary beamline available in the AEgIS experimental zone. The antiproton annihilation products were detected using emulsion films developed at the Laboratory of High Energy Physics in Bern, where they were analysed at the automatic microscope facility. The fragment multiplicity measured in this study is in good agreement with results obtained with FLUKA simulations for both minimally and heavily ionizing particles. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1701.06306v2-abstract-full').style.display = 'none'; document.getElementById('1701.06306v2-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 23 April, 2017; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 23 January, 2017; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> January 2017. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> 2017 JINST 12 P04021 </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1311.4982">arXiv:1311.4982</a> <span> [<a href="https://arxiv.org/pdf/1311.4982">pdf</a>, <a href="https://arxiv.org/format/1311.4982">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"> Annihilation of low energy antiprotons in silicon </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Aghion%2C+S">S. Aghion</a>, <a href="/search/physics?searchtype=author&query=Ahl%C3%A9n%2C+O">O. Ahl茅n</a>, <a href="/search/physics?searchtype=author&query=Belov%2C+A+S">A. S. Belov</a>, <a href="/search/physics?searchtype=author&query=Bonomi%2C+G">G. Bonomi</a>, <a href="/search/physics?searchtype=author&query=Br%C3%A4unig%2C+P">P. Br盲unig</a>, <a href="/search/physics?searchtype=author&query=Bremer%2C+J">J. Bremer</a>, <a href="/search/physics?searchtype=author&query=Brusa%2C+R+S">R. S. Brusa</a>, <a href="/search/physics?searchtype=author&query=Burghart%2C+G">G. Burghart</a>, <a href="/search/physics?searchtype=author&query=Cabaret%2C+L">L. Cabaret</a>, <a href="/search/physics?searchtype=author&query=Caccia%2C+M">M. Caccia</a>, <a href="/search/physics?searchtype=author&query=Canali%2C+C">C. Canali</a>, <a href="/search/physics?searchtype=author&query=Caravita%2C+R">R. Caravita</a>, <a href="/search/physics?searchtype=author&query=Castelli%2C+F">F. Castelli</a>, <a href="/search/physics?searchtype=author&query=Cerchiari%2C+G">G. Cerchiari</a>, <a href="/search/physics?searchtype=author&query=Cialdi%2C+S">S. Cialdi</a>, <a href="/search/physics?searchtype=author&query=Comparat%2C+D">D. Comparat</a>, <a href="/search/physics?searchtype=author&query=Consolati%2C+G">G. Consolati</a>, <a href="/search/physics?searchtype=author&query=Derking%2C+J+H">J. H. Derking</a>, <a href="/search/physics?searchtype=author&query=Di+Domizio%2C+S">S. Di Domizio</a>, <a href="/search/physics?searchtype=author&query=Di+Noto%2C+L">L. Di Noto</a>, <a href="/search/physics?searchtype=author&query=Doser%2C+M">M. Doser</a>, <a href="/search/physics?searchtype=author&query=Dudarev%2C+A">A. Dudarev</a>, <a href="/search/physics?searchtype=author&query=Ferragut%2C+R">R. Ferragut</a>, <a href="/search/physics?searchtype=author&query=Fontana%2C+A">A. Fontana</a>, <a href="/search/physics?searchtype=author&query=Genova%2C+P">P. Genova</a> , et al. (34 additional authors not shown) </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="1311.4982v2-abstract-short" style="display: inline;"> The goal of the AE$\mathrm{\bar{g}}$IS experiment at the Antiproton Decelerator (AD) at CERN, is to measure directly the Earth's gravitational acceleration on antimatter. To achieve this goal, the AE$\mathrm{\bar{g}}$IS collaboration will produce a pulsed, cold (100 mK) antihydrogen beam with a velocity of a few 100 m/s and measure the magnitude of the vertical deflection of the beam from a straig… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1311.4982v2-abstract-full').style.display = 'inline'; document.getElementById('1311.4982v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1311.4982v2-abstract-full" style="display: none;"> The goal of the AE$\mathrm{\bar{g}}$IS experiment at the Antiproton Decelerator (AD) at CERN, is to measure directly the Earth's gravitational acceleration on antimatter. To achieve this goal, the AE$\mathrm{\bar{g}}$IS collaboration will produce a pulsed, cold (100 mK) antihydrogen beam with a velocity of a few 100 m/s and measure the magnitude of the vertical deflection of the beam from a straight path. The final position of the falling antihydrogen will be detected by a position sensitive detector. This detector will consist of an active silicon part, where the annihilations take place, followed by an emulsion part. Together, they allow to achieve 1$%$ precision on the measurement of $\bar{g}$ with about 600 reconstructed and time tagged annihilations. We present here, to the best of our knowledge, the first direct measurement of antiproton annihilation in a segmented silicon sensor, the first step towards designing a position sensitive silicon detector for the AE$\mathrm{\bar{g}}$IS experiment. We also present a first comparison with Monte Carlo simulations (GEANT4) for antiproton energies below 5 MeV <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1311.4982v2-abstract-full').style.display = 'none'; document.getElementById('1311.4982v2-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 March, 2014; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 20 November, 2013; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> November 2013. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">21 pages in total, 29 figures, 3 tables</span> </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1306.5602">arXiv:1306.5602</a> <span> [<a href="https://arxiv.org/pdf/1306.5602">pdf</a>, <a href="https://arxiv.org/format/1306.5602">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/10.1088/1748-0221/8/08/P08013">10.1088/1748-0221/8/08/P08013 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Prospects for measuring the gravitational free-fall of antihydrogen with emulsion detectors </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=AEgIS+Collaboration"> AEgIS Collaboration</a>, <a href="/search/physics?searchtype=author&query=Aghion%2C+S">S. Aghion</a>, <a href="/search/physics?searchtype=author&query=Ahl%C3%A9n%2C+O">O. Ahl茅n</a>, <a href="/search/physics?searchtype=author&query=Amsler%2C+C">C. Amsler</a>, <a href="/search/physics?searchtype=author&query=Ariga%2C+A">A. Ariga</a>, <a href="/search/physics?searchtype=author&query=Ariga%2C+T">T. Ariga</a>, <a href="/search/physics?searchtype=author&query=Belov%2C+A+S">A. S. Belov</a>, <a href="/search/physics?searchtype=author&query=Bonomi%2C+G">G. Bonomi</a>, <a href="/search/physics?searchtype=author&query=Br%C3%A4unig%2C+P">P. Br盲unig</a>, <a href="/search/physics?searchtype=author&query=Bremer%2C+J">J. Bremer</a>, <a href="/search/physics?searchtype=author&query=Brusa%2C+R+S">R. S. Brusa</a>, <a href="/search/physics?searchtype=author&query=Cabaret%2C+L">L. Cabaret</a>, <a href="/search/physics?searchtype=author&query=Canali%2C+C">C. Canali</a>, <a href="/search/physics?searchtype=author&query=Caravita%2C+R">R. Caravita</a>, <a href="/search/physics?searchtype=author&query=Castelli%2C+F">F. Castelli</a>, <a href="/search/physics?searchtype=author&query=Cerchiari%2C+G">G. Cerchiari</a>, <a href="/search/physics?searchtype=author&query=Cialdi%2C+S">S. Cialdi</a>, <a href="/search/physics?searchtype=author&query=Comparat%2C+D">D. Comparat</a>, <a href="/search/physics?searchtype=author&query=Consolati%2C+G">G. Consolati</a>, <a href="/search/physics?searchtype=author&query=Derking%2C+J+H">J. H. Derking</a>, <a href="/search/physics?searchtype=author&query=Di+Domizio%2C+S">S. Di Domizio</a>, <a href="/search/physics?searchtype=author&query=Di+Noto%2C+L">L. Di Noto</a>, <a href="/search/physics?searchtype=author&query=Doser%2C+M">M. Doser</a>, <a href="/search/physics?searchtype=author&query=Dudarev%2C+A">A. Dudarev</a>, <a href="/search/physics?searchtype=author&query=Ereditato%2C+A">A. Ereditato</a> , et al. (46 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="1306.5602v1-abstract-short" style="display: inline;"> The main goal of the AEgIS experiment at CERN is to test the weak equivalence principle for antimatter. AEgIS will measure the free-fall of an antihydrogen beam traversing a moir茅 deflectometer. The goal is to determine the gravitational acceleration g for antihydrogen with an initial relative accuracy of 1% by using an emulsion detector combined with a silicon micro-strip detector to measure the… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1306.5602v1-abstract-full').style.display = 'inline'; document.getElementById('1306.5602v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1306.5602v1-abstract-full" style="display: none;"> The main goal of the AEgIS experiment at CERN is to test the weak equivalence principle for antimatter. AEgIS will measure the free-fall of an antihydrogen beam traversing a moir茅 deflectometer. The goal is to determine the gravitational acceleration g for antihydrogen with an initial relative accuracy of 1% by using an emulsion detector combined with a silicon micro-strip detector to measure the time of flight. Nuclear emulsions can measure the annihilation vertex of antihydrogen atoms with a precision of about 1 - 2 microns r.m.s. We present here results for emulsion detectors operated in vacuum using low energy antiprotons from the CERN antiproton decelerator. We compare with Monte Carlo simulations, and discuss the impact on the AEgIS project. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1306.5602v1-abstract-full').style.display = 'none'; document.getElementById('1306.5602v1-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 June, 2013; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> June 2013. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">20 pages, 16 figures, 3 tables</span> </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/0805.4727">arXiv:0805.4727</a> <span> [<a href="https://arxiv.org/pdf/0805.4727">pdf</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Atomic Physics">physics.atom-ph</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="General Relativity and Quantum Cosmology">gr-qc</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/10.1063/1.2977857">10.1063/1.2977857 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Formation Of A Cold Antihydrogen Beam in AEGIS For Gravity Measurements </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Testera%2C+G">G. Testera</a>, <a href="/search/physics?searchtype=author&query=Belov%2C+A+S">A. S. Belov</a>, <a href="/search/physics?searchtype=author&query=Bonomi%2C+G">G. Bonomi</a>, <a href="/search/physics?searchtype=author&query=Boscolo%2C+I">I. Boscolo</a>, <a href="/search/physics?searchtype=author&query=Brambilla%2C+N">N. Brambilla</a>, <a href="/search/physics?searchtype=author&query=Brusa%2C+R+S">R. S. Brusa</a>, <a href="/search/physics?searchtype=author&query=Byakov%2C+V+M">V. M. Byakov</a>, <a href="/search/physics?searchtype=author&query=Cabaret%2C+L">L. Cabaret</a>, <a href="/search/physics?searchtype=author&query=Canali%2C+C">C. Canali</a>, <a href="/search/physics?searchtype=author&query=Carraro%2C+C">C. Carraro</a>, <a href="/search/physics?searchtype=author&query=Castelli%2C+F">F. Castelli</a>, <a href="/search/physics?searchtype=author&query=Cialdi%2C+S">S. Cialdi</a>, <a href="/search/physics?searchtype=author&query=de+Combarieu%2C+M">M. de Combarieu</a>, <a href="/search/physics?searchtype=author&query=Comparat%2C+D">D. Comparat</a>, <a href="/search/physics?searchtype=author&query=Consolati%2C+G">G. Consolati</a>, <a href="/search/physics?searchtype=author&query=Djourelov%2C+N">N. Djourelov</a>, <a href="/search/physics?searchtype=author&query=Doser%2C+M">M. Doser</a>, <a href="/search/physics?searchtype=author&query=Drobychev%2C+G">G. Drobychev</a>, <a href="/search/physics?searchtype=author&query=Dupasquier%2C+A">A. Dupasquier</a>, <a href="/search/physics?searchtype=author&query=Fabris%2C+D">D. Fabris</a>, <a href="/search/physics?searchtype=author&query=Ferragut%2C+R">R. Ferragut</a>, <a href="/search/physics?searchtype=author&query=Ferrari%2C+G">G. Ferrari</a>, <a href="/search/physics?searchtype=author&query=Fischer%2C+A">A. Fischer</a>, <a href="/search/physics?searchtype=author&query=Fontana%2C+A">A. Fontana</a>, <a href="/search/physics?searchtype=author&query=Forget%2C+P">P. Forget</a> , et al. (40 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="0805.4727v1-abstract-short" style="display: inline;"> The formation of the antihydrogen beam in the AEGIS experiment through the use of inhomogeneous electric fields is discussed and simulation results including the geometry of the apparatus and realistic hypothesis about the antihydrogen initial conditions are shown. The resulting velocity distribution matches the requirements of the gravity experiment. In particular it is shown that the inhomogen… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('0805.4727v1-abstract-full').style.display = 'inline'; document.getElementById('0805.4727v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="0805.4727v1-abstract-full" style="display: none;"> The formation of the antihydrogen beam in the AEGIS experiment through the use of inhomogeneous electric fields is discussed and simulation results including the geometry of the apparatus and realistic hypothesis about the antihydrogen initial conditions are shown. The resulting velocity distribution matches the requirements of the gravity experiment. In particular it is shown that the inhomogeneous electric fields provide radial cooling of the beam during the acceleration. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('0805.4727v1-abstract-full').style.display = 'none'; document.getElementById('0805.4727v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 30 May, 2008; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> May 2008. </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">Invited talk at Pbar08 - Workshop on Cold Antimatter Plasmas and Application to Fundamental Physics, Okinawa, Japan, 2008</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> AIP Conf.Proc.1037:5-15,2008 </p> 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