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</div> <div class="control"> <button class="button is-small is-link">Go</button> </div> </div> </form> </div> </div> <ol class="breathe-horizontal" start="1"> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2407.15311">arXiv:2407.15311</a> <span> [<a href="https://arxiv.org/pdf/2407.15311">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="Nuclear Experiment">nucl-ex</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.7566/JPSJ.93.091009">10.7566/JPSJ.93.091009 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Polarized cold-neutron reflectometry at JRR-3/MINE2 for the development of ultracold-neutron spin analyzers for a neutron EDM experiment at TRIUMF </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Higuchi%2C+T">Takashi Higuchi</a>, <a href="/search/physics?searchtype=author&query=Akatsuka%2C+H">Hiroaki Akatsuka</a>, <a href="/search/physics?searchtype=author&query=Brossard%2C+A">Alexis Brossard</a>, <a href="/search/physics?searchtype=author&query=Fujimoto%2C+D">Derek Fujimoto</a>, <a href="/search/physics?searchtype=author&query=Giampa%2C+P">Pietro Giampa</a>, <a href="/search/physics?searchtype=author&query=Hansen-Romu%2C+S">Sean Hansen-Romu</a>, <a href="/search/physics?searchtype=author&query=Hatanaka%2C+K">Kichiji Hatanaka</a>, <a href="/search/physics?searchtype=author&query=Hino%2C+M">Masahiro Hino</a>, <a href="/search/physics?searchtype=author&query=Ichikawa%2C+G">Go Ichikawa</a>, <a href="/search/physics?searchtype=author&query=Imajo%2C+S">Sohei Imajo</a>, <a href="/search/physics?searchtype=author&query=Jamieson%2C+B">Blair Jamieson</a>, <a href="/search/physics?searchtype=author&query=Kawasaki%2C+S">Shinsuke Kawasaki</a>, <a href="/search/physics?searchtype=author&query=Kitaguchi%2C+M">Masaaki Kitaguchi</a>, <a href="/search/physics?searchtype=author&query=Mammei%2C+R">Russell Mammei</a>, <a href="/search/physics?searchtype=author&query=Matsumiya%2C+R">Ryohei Matsumiya</a>, <a href="/search/physics?searchtype=author&query=Mishima%2C+K">Kenji Mishima</a>, <a href="/search/physics?searchtype=author&query=Picker%2C+R">R眉diger Picker</a>, <a href="/search/physics?searchtype=author&query=Schreyer%2C+W">Wolfgang Schreyer</a>, <a href="/search/physics?searchtype=author&query=Shimizu%2C+H+M">Hirohiko M. Shimizu</a>, <a href="/search/physics?searchtype=author&query=Sidhu%2C+S">Steve Sidhu</a>, <a href="/search/physics?searchtype=author&query=Vanbergen%2C+S">Sean Vanbergen</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2407.15311v2-abstract-short" style="display: inline;"> The neutron electric dipole moment (EDM) is a sensitive probe for currently undiscovered sources of charge-parity symmetry violation. As part of the TRIUMF Ultracold Advanced Neutron (TUCAN) collaboration, we are developing spin analyzers for ultracold neutrons (UCNs) to be used for a next-generation experiment to measure the neutron EDM with unprecedented precision. Spin-state analysis of UCNs co… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2407.15311v2-abstract-full').style.display = 'inline'; document.getElementById('2407.15311v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2407.15311v2-abstract-full" style="display: none;"> The neutron electric dipole moment (EDM) is a sensitive probe for currently undiscovered sources of charge-parity symmetry violation. As part of the TRIUMF Ultracold Advanced Neutron (TUCAN) collaboration, we are developing spin analyzers for ultracold neutrons (UCNs) to be used for a next-generation experiment to measure the neutron EDM with unprecedented precision. Spin-state analysis of UCNs constitutes an essential part of the neutron EDM measurement sequence. Magnetized iron films used as spin filters of UCNs are crucial experimental components, whose performance directly influences the statistical sensitivity of the measurement. To test such iron film spin filters, we propose the use of polarized cold-neutron reflectometry, in addition to conventional UCN transmission experiments. The new method provides information on iron film samples complementary to the UCN tests and accelerates the development cycles. We developed a collaborative effort to produce iron film spin filters and test them with cold and ultracold neutrons available at JRR-3/MINE2 and J-PARC/MLF BL05. In this article, we review the methods of neutron EDM measurements, discuss the complementarity of this new approach to test UCN spin filters, provide an overview of our related activities, and present the first results of polarized cold-neutron reflectometry recently conducted at the MINE2 beamline. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2407.15311v2-abstract-full').style.display = 'none'; document.getElementById('2407.15311v2-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 4 September, 2024; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 21 July, 2024; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> July 2024. </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2207.09880">arXiv:2207.09880</a> <span> [<a href="https://arxiv.org/pdf/2207.09880">pdf</a>, <a href="https://arxiv.org/ps/2207.09880">ps</a>, <a href="https://arxiv.org/format/2207.09880">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Instrumentation and Detectors">physics.ins-det</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Nuclear Experiment">nucl-ex</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.7566/JPSCP.37.020701">10.7566/JPSCP.37.020701 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> The Precision nEDM Measurement with UltraCold Neutrons at TRIUMF </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Matsumiya%2C+R">Ryohei Matsumiya</a>, <a href="/search/physics?searchtype=author&query=Akatsuka%2C+H">Hiroaki Akatsuka</a>, <a href="/search/physics?searchtype=author&query=Bidinosti%2C+C+P">Chris P. Bidinosti</a>, <a href="/search/physics?searchtype=author&query=Davis%2C+C+A">Charles A. Davis</a>, <a href="/search/physics?searchtype=author&query=Franke%2C+B">Beatrice Franke</a>, <a href="/search/physics?searchtype=author&query=Fujimoto%2C+D">Derek Fujimoto</a>, <a href="/search/physics?searchtype=author&query=Gericke%2C+M+T+W">Michael T. W. Gericke</a>, <a href="/search/physics?searchtype=author&query=Giampa%2C+P">Pietro Giampa</a>, <a href="/search/physics?searchtype=author&query=Golub%2C+R">Robert Golub</a>, <a href="/search/physics?searchtype=author&query=Hansen-Romu%2C+S">Sean Hansen-Romu</a>, <a href="/search/physics?searchtype=author&query=Hatanaka%2C+K">Kichiji Hatanaka</a>, <a href="/search/physics?searchtype=author&query=Hayamizu%2C+T">Tomohiro Hayamizu</a>, <a href="/search/physics?searchtype=author&query=Higuchi%2C+T">Takashi Higuchi</a>, <a href="/search/physics?searchtype=author&query=Ichikawa%2C+G">Go Ichikawa</a>, <a href="/search/physics?searchtype=author&query=Imajo%2C+S">Sohei Imajo</a>, <a href="/search/physics?searchtype=author&query=Jamieson%2C+B">Blair Jamieson</a>, <a href="/search/physics?searchtype=author&query=Kawasaki%2C+S">Shinsuke Kawasaki</a>, <a href="/search/physics?searchtype=author&query=Kitaguchi%2C+M">Masaaki Kitaguchi</a>, <a href="/search/physics?searchtype=author&query=Klassen%2C+W">Wolfgang Klassen</a>, <a href="/search/physics?searchtype=author&query=Klemets%2C+E">Emma Klemets</a>, <a href="/search/physics?searchtype=author&query=Konaka%2C+A">Akira Konaka</a>, <a href="/search/physics?searchtype=author&query=Korkmaz%2C+E">Elie Korkmaz</a>, <a href="/search/physics?searchtype=author&query=Korobkina%2C+E">Ekaterina Korobkina</a>, <a href="/search/physics?searchtype=author&query=Kuchler%2C+F">Florian Kuchler</a>, <a href="/search/physics?searchtype=author&query=Lavvaf%2C+M">Maedeh Lavvaf</a> , et al. (23 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="2207.09880v1-abstract-short" style="display: inline;"> The TRIUMF Ultra-Cold Advanced Neutron (TUCAN) collaboration aims at a precision neutron electric dipole moment (nEDM) measurement with an uncertainty of $10^{-27}\,e\cdot\mathrm{cm}$, which is an order-of-magnitude better than the current nEDM upper limit and enables us to test Supersymmetry. To achieve this precision, we are developing a new high-intensity ultracold neutron (UCN) source using su… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2207.09880v1-abstract-full').style.display = 'inline'; document.getElementById('2207.09880v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2207.09880v1-abstract-full" style="display: none;"> The TRIUMF Ultra-Cold Advanced Neutron (TUCAN) collaboration aims at a precision neutron electric dipole moment (nEDM) measurement with an uncertainty of $10^{-27}\,e\cdot\mathrm{cm}$, which is an order-of-magnitude better than the current nEDM upper limit and enables us to test Supersymmetry. To achieve this precision, we are developing a new high-intensity ultracold neutron (UCN) source using super-thermal UCN production in superfluid helium (He-II) and a nEDM spectrometer. The current development status of them is reported in this article. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2207.09880v1-abstract-full').style.display = 'none'; document.getElementById('2207.09880v1-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 July, 2022; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> July 2022. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">Proceedings of the 24th International Spin Symposium (SPIN 2021), 18-22 October 2021, Matsue, Japan</span> </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2207.08441">arXiv:2207.08441</a> <span> [<a href="https://arxiv.org/pdf/2207.08441">pdf</a>, <a href="https://arxiv.org/ps/2207.08441">ps</a>, <a href="https://arxiv.org/format/2207.08441">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Instrumentation and Detectors">physics.ins-det</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Nuclear Experiment">nucl-ex</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.7566/JPSCP.37.020801">10.7566/JPSCP.37.020801 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Study of Thin Iron Films for Polarization Analysis of Ultracold Neutrons </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Akatsuka%2C+H">Hiroaki Akatsuka</a>, <a href="/search/physics?searchtype=author&query=Higuchi%2C+T">Takashi Higuchi</a>, <a href="/search/physics?searchtype=author&query=Hansen-Romu%2C+S">Sean Hansen-Romu</a>, <a href="/search/physics?searchtype=author&query=Hatanaka%2C+K">Kichiji Hatanaka</a>, <a href="/search/physics?searchtype=author&query=Hayamizu%2C+T">Tomohiro Hayamizu</a>, <a href="/search/physics?searchtype=author&query=Hino%2C+M">Masahiro Hino</a>, <a href="/search/physics?searchtype=author&query=Ichikawa%2C+G">Go Ichikawa</a>, <a href="/search/physics?searchtype=author&query=Imajo%2C+S">Sohei Imajo</a>, <a href="/search/physics?searchtype=author&query=Jamieson%2C+B">Blair Jamieson</a>, <a href="/search/physics?searchtype=author&query=Kawasaki%2C+S">Shinsuke Kawasaki</a>, <a href="/search/physics?searchtype=author&query=Kitaguchi%2C+M">Masaaki Kitaguchi</a>, <a href="/search/physics?searchtype=author&query=Matsumiya%2C+R">Ryohei Matsumiya</a>, <a href="/search/physics?searchtype=author&query=Mishima%2C+K">Kenji Mishima</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="2207.08441v1-abstract-short" style="display: inline;"> The TUCAN (TRIUMF Ultra-Cold Advanced Neutron) collaboration aims to search for the neutron electric dipole moment (nEDM) with unprecedented precision. One of the essential elements for the nEDM measurement is a polarization analyzer of ultracold neutrons (UCNs), whose main component is a magnetized thin iron film. Several thin iron films were deposited on aluminum and silicon ubstrates and were c… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2207.08441v1-abstract-full').style.display = 'inline'; document.getElementById('2207.08441v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2207.08441v1-abstract-full" style="display: none;"> The TUCAN (TRIUMF Ultra-Cold Advanced Neutron) collaboration aims to search for the neutron electric dipole moment (nEDM) with unprecedented precision. One of the essential elements for the nEDM measurement is a polarization analyzer of ultracold neutrons (UCNs), whose main component is a magnetized thin iron film. Several thin iron films were deposited on aluminum and silicon ubstrates and were characterized by vibrating sample magnetometry and cold-neutron reflectometry. A magnetic field required to saturate the iron film is $\sim$12 kA/m for those on the aluminum substrates and 6.4 kA/m for the silicon substrates. The magnetic potential of the iron films on the Si substrate was estimated to be 2 T by the neutron reflectometry, which is sufficient performance for an UCN polarization analyzer of the nEDM measurement. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2207.08441v1-abstract-full').style.display = 'none'; document.getElementById('2207.08441v1-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 July, 2022; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> July 2022. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">Proceedings of the 24th International Spin Symposium (SPIN 2021), 18-22 October 2021, Matsue, Japan</span> </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1905.08857">arXiv:1905.08857</a> <span> [<a href="https://arxiv.org/pdf/1905.08857">pdf</a>, <a href="https://arxiv.org/format/1905.08857">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Accelerator Physics">physics.acc-ph</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Nuclear Experiment">nucl-ex</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Instrumentation and Detectors">physics.ins-det</span> </div> <div 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/PhysRevAccelBeams.22.102401">10.1103/PhysRevAccelBeams.22.102401 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> A fast-switching magnet serving a spallation-driven ultracold neutron source </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Ahmed%2C+S">S. Ahmed</a>, <a href="/search/physics?searchtype=author&query=Altiere%2C+E">E. Altiere</a>, <a href="/search/physics?searchtype=author&query=Andalib%2C+T">T. Andalib</a>, <a href="/search/physics?searchtype=author&query=Barnes%2C+M+J">M. J. Barnes</a>, <a href="/search/physics?searchtype=author&query=Bell%2C+B">B. Bell</a>, <a href="/search/physics?searchtype=author&query=Bidinosti%2C+C+P">C. P. Bidinosti</a>, <a href="/search/physics?searchtype=author&query=Bylinsky%2C+Y">Y. Bylinsky</a>, <a href="/search/physics?searchtype=author&query=Chak%2C+J">J. Chak</a>, <a href="/search/physics?searchtype=author&query=Das%2C+M">M. Das</a>, <a href="/search/physics?searchtype=author&query=Davis%2C+C+A">C. A. Davis</a>, <a href="/search/physics?searchtype=author&query=Fischer%2C+F">F. Fischer</a>, <a href="/search/physics?searchtype=author&query=Franke%2C+B">B. Franke</a>, <a href="/search/physics?searchtype=author&query=Gericke%2C+M+T+W">M. T. W. Gericke</a>, <a href="/search/physics?searchtype=author&query=Giampa%2C+P">P. Giampa</a>, <a href="/search/physics?searchtype=author&query=Hahn%2C+M">M. Hahn</a>, <a href="/search/physics?searchtype=author&query=Hansen-Romu%2C+S">S. Hansen-Romu</a>, <a href="/search/physics?searchtype=author&query=Hatanaka%2C+K">K. Hatanaka</a>, <a href="/search/physics?searchtype=author&query=Hayamizu%2C+T">T. Hayamizu</a>, <a href="/search/physics?searchtype=author&query=Jamieson%2C+B">B. Jamieson</a>, <a href="/search/physics?searchtype=author&query=Jones%2C+D">D. Jones</a>, <a href="/search/physics?searchtype=author&query=Katsika%2C+K">K. Katsika</a>, <a href="/search/physics?searchtype=author&query=Kawasaki%2C+S">S. Kawasaki</a>, <a href="/search/physics?searchtype=author&query=Kikawa%2C+T">T. Kikawa</a>, <a href="/search/physics?searchtype=author&query=Klassen%2C+W">W. Klassen</a>, <a href="/search/physics?searchtype=author&query=Konaka%2C+A">A. Konaka</a> , et al. (25 additional authors not shown) </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="1905.08857v2-abstract-short" style="display: inline;"> A fast-switching, high-repetition-rate magnet and power supply have been developed for and operated at TRIUMF, to deliver a proton beam to the new ultracold neutron (UCN) facility. The facility possesses unique operational requirements: a time-averaged beam current of 40~$渭$A with the ability to switch the beam on or off for several minutes. These requirements are in conflict with the typical oper… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1905.08857v2-abstract-full').style.display = 'inline'; document.getElementById('1905.08857v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1905.08857v2-abstract-full" style="display: none;"> A fast-switching, high-repetition-rate magnet and power supply have been developed for and operated at TRIUMF, to deliver a proton beam to the new ultracold neutron (UCN) facility. The facility possesses unique operational requirements: a time-averaged beam current of 40~$渭$A with the ability to switch the beam on or off for several minutes. These requirements are in conflict with the typical operation mode of the TRIUMF cyclotron which delivers nearly continuous beam to multiple users. To enable the creation of the UCN facility, a beam-sharing arrangement with another facility was made. The beam sharing is accomplished by the fast-switching (kicker) magnet which is ramped in 50~$渭$s to a current of 193~A, held there for approximately 1~ms, then ramped down in the same short period of time. This achieves a 12~mrad deflection which is sufficient to switch the proton beam between the two facilities. The kicker magnet relies on a high-current, low-inductance coil connected to a fast-switching power supply that is based on insulated-gate bipolar transistors (IGBTs). The design and performance of the kicker magnet system and initial beam delivery results are reported. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1905.08857v2-abstract-full').style.display = 'none'; document.getElementById('1905.08857v2-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 August, 2019; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 21 May, 2019; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> May 2019. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">16 pages, 21 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/1810.01001">arXiv:1810.01001</a> <span> [<a href="https://arxiv.org/pdf/1810.01001">pdf</a>, <a href="https://arxiv.org/format/1810.01001">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.2019.01.074">10.1016/j.nima.2019.01.074 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> A beamline for fundamental neutron physics at TRIUMF </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Ahmed%2C+S">S. Ahmed</a>, <a href="/search/physics?searchtype=author&query=Andalib%2C+T">T. Andalib</a>, <a href="/search/physics?searchtype=author&query=Barnes%2C+M+J">M. J. Barnes</a>, <a href="/search/physics?searchtype=author&query=Bidinosti%2C+C+B">C. B. Bidinosti</a>, <a href="/search/physics?searchtype=author&query=Bylinsky%2C+Y">Y. Bylinsky</a>, <a href="/search/physics?searchtype=author&query=Chak%2C+J">J. Chak</a>, <a href="/search/physics?searchtype=author&query=Das%2C+M">M. Das</a>, <a href="/search/physics?searchtype=author&query=Davis%2C+C+A">C. A. Davis</a>, <a href="/search/physics?searchtype=author&query=Franke%2C+B">B. Franke</a>, <a href="/search/physics?searchtype=author&query=Gericke%2C+M+T+W">M. T. W. Gericke</a>, <a href="/search/physics?searchtype=author&query=Giampa%2C+P">P. Giampa</a>, <a href="/search/physics?searchtype=author&query=Hahn%2C+M">M. Hahn</a>, <a href="/search/physics?searchtype=author&query=Hansen-Romu%2C+S">S. Hansen-Romu</a>, <a href="/search/physics?searchtype=author&query=Hatanaka%2C+K">K. Hatanaka</a>, <a href="/search/physics?searchtype=author&query=Jamieson%2C+B">B. Jamieson</a>, <a href="/search/physics?searchtype=author&query=Jones%2C+D">D. Jones</a>, <a href="/search/physics?searchtype=author&query=Katsika%2C+K">K. Katsika</a>, <a href="/search/physics?searchtype=author&query=Kawasaki%2C+S">S. Kawasaki</a>, <a href="/search/physics?searchtype=author&query=Klassen%2C+W">W. Klassen</a>, <a href="/search/physics?searchtype=author&query=Konaka%2C+A">A. Konaka</a>, <a href="/search/physics?searchtype=author&query=Korkmaz%2C+E">E. Korkmaz</a>, <a href="/search/physics?searchtype=author&query=Kuchler%2C+F">F. Kuchler</a>, <a href="/search/physics?searchtype=author&query=Kurchaninov%2C+L">L. Kurchaninov</a>, <a href="/search/physics?searchtype=author&query=Lang%2C+M">M. Lang</a>, <a href="/search/physics?searchtype=author&query=Lee%2C+L">L. Lee</a> , et al. (22 additional authors not shown) </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="1810.01001v2-abstract-short" style="display: inline;"> This article describes the new primary proton beamline 1U at TRIUMF. The purpose of this beamline is to produce ultracold neutrons (UCN) for fundamental-physics experiments. It delivers up to 40 microA of 480 MeV protons from the TRIUMF cyclotron to a tungsten spallation target and uses a fast kicker to share the beam between the Center for Molecular and Materials Science and UCN. The beamline has… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1810.01001v2-abstract-full').style.display = 'inline'; document.getElementById('1810.01001v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1810.01001v2-abstract-full" style="display: none;"> This article describes the new primary proton beamline 1U at TRIUMF. The purpose of this beamline is to produce ultracold neutrons (UCN) for fundamental-physics experiments. It delivers up to 40 microA of 480 MeV protons from the TRIUMF cyclotron to a tungsten spallation target and uses a fast kicker to share the beam between the Center for Molecular and Materials Science and UCN. The beamline has been successfully commissioned and operated with a beam current up to 10 microA, facilitating first large-scale UCN production in Canada. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1810.01001v2-abstract-full').style.display = 'none'; document.getElementById('1810.01001v2-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> 26 December, 2018; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 1 October, 2018; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> October 2018. </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1809.04071">arXiv:1809.04071</a> <span> [<a href="https://arxiv.org/pdf/1809.04071">pdf</a>, <a href="https://arxiv.org/format/1809.04071">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Instrumentation and Detectors">physics.ins-det</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Nuclear Experiment">nucl-ex</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1103/PhysRevC.99.025503">10.1103/PhysRevC.99.025503 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> First ultracold neutrons produced at TRIUMF </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Ahmed%2C+S">S. Ahmed</a>, <a href="/search/physics?searchtype=author&query=Altiere%2C+E">E. Altiere</a>, <a href="/search/physics?searchtype=author&query=Andalib%2C+T">T. Andalib</a>, <a href="/search/physics?searchtype=author&query=Bell%2C+B">B. Bell</a>, <a href="/search/physics?searchtype=author&query=Bidinosti%2C+C+P">C. P. Bidinosti</a>, <a href="/search/physics?searchtype=author&query=Cudmore%2C+E">E. Cudmore</a>, <a href="/search/physics?searchtype=author&query=Das%2C+M">M. Das</a>, <a href="/search/physics?searchtype=author&query=Davis%2C+C+A">C. A. Davis</a>, <a href="/search/physics?searchtype=author&query=Franke%2C+B">B. Franke</a>, <a href="/search/physics?searchtype=author&query=Gericke%2C+M">M. Gericke</a>, <a href="/search/physics?searchtype=author&query=Giampa%2C+P">P. Giampa</a>, <a href="/search/physics?searchtype=author&query=Gnyp%2C+P">P. Gnyp</a>, <a href="/search/physics?searchtype=author&query=Hansen-Romu%2C+S">S. Hansen-Romu</a>, <a href="/search/physics?searchtype=author&query=Hatanaka%2C+K">K. Hatanaka</a>, <a href="/search/physics?searchtype=author&query=Hayamizu%2C+T">T. Hayamizu</a>, <a href="/search/physics?searchtype=author&query=Jamieson%2C+B">B. Jamieson</a>, <a href="/search/physics?searchtype=author&query=Jones%2C+D">D. Jones</a>, <a href="/search/physics?searchtype=author&query=Kawasaki%2C+S">S. Kawasaki</a>, <a href="/search/physics?searchtype=author&query=Kikawa%2C+T">T. Kikawa</a>, <a href="/search/physics?searchtype=author&query=Kitaguchi%2C+M">M. Kitaguchi</a>, <a href="/search/physics?searchtype=author&query=Klassen%2C+W">W. Klassen</a>, <a href="/search/physics?searchtype=author&query=Konaka%2C+A">A. Konaka</a>, <a href="/search/physics?searchtype=author&query=Korkmaz%2C+E">E. Korkmaz</a>, <a href="/search/physics?searchtype=author&query=Kuchler%2C+F">F. Kuchler</a>, <a href="/search/physics?searchtype=author&query=Lang%2C+M">M. Lang</a> , et al. (28 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="1809.04071v3-abstract-short" style="display: inline;"> We installed a source for ultracold neutrons at a new, dedicated spallation target at TRIUMF. The source was originally developed in Japan and uses a superfluid-helium converter cooled to 0.9$\,$K. During an extensive test campaign in November 2017, we extracted up to 325000 ultracold neutrons after a one-minute irradiation of the target, over three times more than previously achieved with this so… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1809.04071v3-abstract-full').style.display = 'inline'; document.getElementById('1809.04071v3-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1809.04071v3-abstract-full" style="display: none;"> We installed a source for ultracold neutrons at a new, dedicated spallation target at TRIUMF. The source was originally developed in Japan and uses a superfluid-helium converter cooled to 0.9$\,$K. During an extensive test campaign in November 2017, we extracted up to 325000 ultracold neutrons after a one-minute irradiation of the target, over three times more than previously achieved with this source. The corresponding ultracold-neutron density in the whole production and guide volume is 5.3$\,$cm$^{-3}$. The storage lifetime of ultracold neutrons in the source was initially 37$\,$s and dropped to 24$\,$s during the eighteen days of operation. During continuous irradiation of the spallation target, we were able to detect a sustained ultracold-neutron rate of up to 1500$\,$s$^{-1}$. Simulations of UCN production, UCN transport, temperature-dependent UCN yield, and temperature-dependent storage lifetime show excellent agreement with the experimental data and confirm that the ultracold-neutron-upscattering rate in superfluid helium is proportional to $T^7$. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1809.04071v3-abstract-full').style.display = 'none'; document.getElementById('1809.04071v3-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 16 December, 2018; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 10 September, 2018; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> September 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">8 pages, 10 figures</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Phys. Rev. C 99, 025503 (2019) </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1608.02912">arXiv:1608.02912</a> <span> [<a href="https://arxiv.org/pdf/1608.02912">pdf</a>, <a href="https://arxiv.org/format/1608.02912">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Instrumentation and Detectors">physics.ins-det</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Nuclear Experiment">nucl-ex</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1140/epja/i2017-12195-7">10.1140/epja/i2017-12195-7 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Characterization of a scintillating lithium glass ultra-cold neutron detector </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Jamieson%2C+B">Blair Jamieson</a>, <a href="/search/physics?searchtype=author&query=Rebenitsch%2C+L+A">Lori A Rebenitsch</a>, <a href="/search/physics?searchtype=author&query=Hansen-Romu%2C+S">Sean Hansen-Romu</a>, <a href="/search/physics?searchtype=author&query=Lauss%2C+B">Bernhard Lauss</a>, <a href="/search/physics?searchtype=author&query=Lindner%2C+T">Thomas Lindner</a>, <a href="/search/physics?searchtype=author&query=Martin%2C+J+W">Jeffery W Martin</a>, <a href="/search/physics?searchtype=author&query=Pierre%2C+E">Edgard Pierre</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="1608.02912v3-abstract-short" style="display: inline;"> A $^{6}$Li glass based scintillation detector developed for the TRIUMF neutron electric dipole moment experiment was characterized using the ultra-cold neutron source at the Paul Scherrer Institute (PSI). The data acquisition system for this detector was demonstrated to perform well at rejecting backgrounds. An estimate of the absolute efficiency of background rejection of $99.7\pm0.1$% is made. F… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1608.02912v3-abstract-full').style.display = 'inline'; document.getElementById('1608.02912v3-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1608.02912v3-abstract-full" style="display: none;"> A $^{6}$Li glass based scintillation detector developed for the TRIUMF neutron electric dipole moment experiment was characterized using the ultra-cold neutron source at the Paul Scherrer Institute (PSI). The data acquisition system for this detector was demonstrated to perform well at rejecting backgrounds. An estimate of the absolute efficiency of background rejection of $99.7\pm0.1$% is made. For variable ultra-cold neutron rate (varying from $<$1 kHz to approx. 100 kHz per channel) and background rate seen at the Paul Scherrer Institute, we estimate that the absolute detector efficiency is $89.7^{+1.3}_{-1.9}$%. Finally a comparison with a commercial Cascade detector was performed for a specific setup at the West-2 beamline of the ultra-cold neutron source at PSI. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1608.02912v3-abstract-full').style.display = 'none'; document.getElementById('1608.02912v3-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 November, 2016; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 8 August, 2016; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> August 2016. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">15 pages, 17 figures, submitted to EPJ A</span> </p> </li> </ol> <div class="is-hidden-tablet">  <span class="help" style="display: inline-block;"><a href="https://github.com/arXiv/arxiv-search/releases">Search v0.5.6 released 2020-02-24</a>  </span> </div> </div> </main> <footer> <div class="columns is-desktop" role="navigation" aria-label="Secondary">  <div class="column"> <div class="columns"> <div class="column"> <ul class="nav-spaced"> <li><a href="https://info.arxiv.org/about">About</a></li> <li><a href="https://info.arxiv.org/help">Help</a></li> </ul> </div> <div class="column"> <ul class="nav-spaced"> <li> <svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 512 512" class="icon filter-black" role="presentation"><title>contact arXiv</title><desc>Click here to contact arXiv</desc><path d="M502.3 190.8c3.9-3.1 9.7-.2 9.7 4.7V400c0 26.5-21.5 48-48 48H48c-26.5 0-48-21.5-48-48V195.6c0-5 5.7-7.8 9.7-4.7 22.4 17.4 52.1 39.5 154.1 113.6 21.1 15.4 56.7 47.8 92.2 47.6 35.7.3 72-32.8 92.3-47.6 102-74.1 131.6-96.3 154-113.7zM256 320c23.2.4 56.6-29.2 73.4-41.4 132.7-96.3 142.8-104.7 173.4-128.7 5.8-4.5 9.2-11.5 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