Cryogenic systems for the TUCAN EDM experiment
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 cm, 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 ~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.
Keywords
Cite
@article{arxiv.2506.09064,
title = {Cryogenic systems for the TUCAN EDM experiment},
author = {Jeffery W. Martin and B. Algohi and D. Anthony and L. Barrón-Palos and M. Bradley and A. Brossard and T. Bui and J. Chak and C. Davis and R. de Vries and K. Drury and D. Fujimoto and R. Fujitani and M. Gericke and P. Giampa and R. Golub and T. Hepworth and T. Higuchi and G. Ichikawa and S. Imajo and A. Jaison and B. Jamieson and M. Katotoka and S. Kawasaki and M. Kitaguchi and W. Klassen and E. Korkmaz and E. Korobkina and M. Lavvaf and T. Lindner and N. Lo and S. Longo and K. Madison and Y. Makida and J. Malcolm and J. Mammei and R. Mammei and C. Marshall and M. McCrea and E. Miller and M. Miller and K. Mishima and T. Mohammadi and T. Momose and T. Okamura and H. J. Ong and R. Patni and R. Picker and W. D. Ramsay and W. Rathnakela and J. Sato and W. Schreyer and T. Shima and H. Shimizu and S. Sidhu and S. Stargardter and P. Switzer and I. Tanihata and S. Vanbergen and W. T. H. vanOers and Y. Watanabe and A. Zahra and M. Zhao},
journal= {arXiv preprint arXiv:2506.09064},
year = {2025}
}
Comments
proceedings of the XLVI Nuclear Physics Conference, Cocoyoc, Morelos, Mexico, January 6-9, 2025