Cryogenic Systems for the TUCAN EDM Experiment

J. W. Martin(University of Winnipeg), B. Algohi(University of Manitoba), David Anthony(TRIUMF), L. Barrón-Palos(Universidad Nacional Autónoma de México), Melanie Bradley(University of Saskatchewan), A. Brossard(TRIUMF), Tung Thanh Bui(University of Manitoba), J. Chak(TRIUMF), Charles A. Davis(TRIUMF), R. de Vries(University of Winnipeg), K. Drury(TRIUMF), Derek Fujimoto(TRIUMF), R. Fujitani(Kyoto University), Michael Gericke(University of Manitoba), P. Giampa(TRIUMF), Robert Golub(North Carolina State University), T. Hepworth(University of Winnipeg), Takashi Higuchi(Institute for Integrated Radiation and Nuclear Science, Kyoto University), Go Ichikawa(High Energy Accelerator Research Organization), Shusaku Imajo(The University of Osaka), A. Jaison(University of Manitoba), B. Jamieson(University of Winnipeg), M. Katotoka(University of Winnipeg), S. Kawasaki(High Energy Accelerator Research Organization), Masaaki Kitaguchi(Nagoya University), W. Klassen(University of British Columbia), E. Korkmaz(University of Northern British Columbia), E. Korobkina(North Carolina State University), M. Lavvaf(University of Manitoba), T. Lindner(TRIUMF), N. Lo(TRIUMF), S. Longo(University of Manitoba), Kirk W. Madison(University of British Columbia), Y. Makida(High Energy Accelerator Research Organization), John Malcolm(TRIUMF), J. Mammei(University of Manitoba), R. Mammei(University of Winnipeg), C. Marshall(TRIUMF), Mark McCrea(University of Winnipeg), E. Miller(University of British Columbia), Meredith Miller(McGill University), K. Mishima(Nagoya University), T. Mohammadi(University of Manitoba), Takamasa Momose(University of British Columbia), T. Okamura(High Energy Accelerator Research Organization), H. J. Ong(The University of Osaka), Rajiv Patni(TRIUMF), R. Picker(TRIUMF), W. D. Ramsay(TRIUMF), W. Rathnakela(University of Manitoba), Jun Sato(Nagoya University), Wolfgang Schreyer(Oak Ridge National Laboratory), Tatsushi Shima(The University of Osaka), Hirohiko M. Shimizu(Nagoya University), S. Sidhu(TRIUMF), Shawn Stargardter(University of Manitoba), Phyllis Switzer(University of Winnipeg), I. Tanihata(The University of Osaka), S. Vanbergen(University of British Columbia), W. T. H. van Oers(TRIUMF), Yutaka Watanabe(High Energy Accelerator Research Organization), A. Zahra(University of Manitoba), M. Zhao(TRIUMF)
EPJ Web of Conferences
January 1, 2025
10.1051/epjconf/202533303004
Cited by 0Open Access
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Abstract

The TUCAN (TRIUMF UltraCold Advanced Neutron) Collaboration is completing a new ultracold neutron (UCN) source. The UCN source will deliver UCNs to a neutron electric dipole moment (EDM) experiment. The EDM experiment is projected to be capable of an uncertainty of 1 × 10−27 ecm, competitive with other planned projects, and a factor of ten more precise than the present world’s best. The TUCAN source is based on a UCN production volume of superfluid helium (He-II), held at 1 K, and coupled to a proton-driven spallation target. The production rate in the source is expected to be in excess of 107 UCN/s; since UCN losses can be small in superfluid helium, this should allow us to build up a large number of UCNs. The spallation-driven superfluid helium technology is the principal aspect making the TUCAN project unique. The superfluid production volume was recently cooled, for the first time, and successfully filled with superfluid helium. The design principles of the UCN source are described, along with some of the challenging cryogenic milestones that were recently passed.

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