Cryogenic Systems for the TUCAN EDM Experiment
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.
Authors
- R. Picker (ORCID: https://orcid.org/0000-0002-7668-0693)
- J. W. Martin
- Wolfgang Schreyer (ORCID: https://orcid.org/0000-0003-2413-4700)
- A. Brossard (ORCID: https://orcid.org/0009-0001-9234-3996)
- Y. Makida (ORCID: https://orcid.org/0000-0003-3638-9970)
- K. Mishima (ORCID: https://orcid.org/0000-0002-8328-543X)
- W. Klassen (ORCID: https://orcid.org/0009-0001-3294-7771)
- R. Mammei (ORCID: https://orcid.org/0009-0005-3481-4832)
- Masaaki Kitaguchi (ORCID: https://orcid.org/0000-0001-7637-6467)
- I. Tanihata (ORCID: https://orcid.org/0000-0002-7484-0921)
- Shawn Stargardter
- Rajiv Patni
- C. Marshall (ORCID: https://orcid.org/0000-0003-4668-4877)
- B. Jamieson (ORCID: https://orcid.org/0000-0003-3589-9127)
- Shusaku Imajo (ORCID: https://orcid.org/0000-0001-9870-3596)
- E. Korkmaz (ORCID: https://orcid.org/0000-0001-7866-0314)
- J. Chak
- L. Barrón-Palos (ORCID: https://orcid.org/0000-0003-3082-3676)
- Takamasa Momose (ORCID: https://orcid.org/0000-0001-8976-1938)
- Robert Golub (ORCID: https://orcid.org/0000-0001-7881-1207)
- M. Lavvaf
- E. Korobkina (ORCID: https://orcid.org/0000-0002-6098-3681)
- Tung Thanh Bui (ORCID: https://orcid.org/0000-0003-4628-059X)
- S. Sidhu
- Tatsushi Shima (ORCID: https://orcid.org/0000-0001-9287-9953)
- Yutaka Watanabe (ORCID: https://orcid.org/0000-0003-2425-7188)
- S. Vanbergen
- H. J. Ong (ORCID: https://orcid.org/0000-0002-7291-7809)
- Melanie Bradley
- Go Ichikawa (ORCID: https://orcid.org/0000-0003-3358-6231)
- S. Longo
- Michael Gericke (ORCID: https://orcid.org/0000-0002-8976-8192)
- Kirk W. Madison (ORCID: https://orcid.org/0000-0003-0331-3267)
- Jun Sato (ORCID: https://orcid.org/0000-0001-5860-9933)
- Meredith Miller
- N. Lo
- Mark McCrea (ORCID: https://orcid.org/0009-0009-8200-1472)
- Takashi Higuchi (ORCID: https://orcid.org/0000-0003-3281-4669)
- S. Kawasaki
- Hirohiko M. Shimizu (ORCID: https://orcid.org/0000-0002-8767-6542)
- J. Mammei
- Derek Fujimoto (ORCID: https://orcid.org/0000-0003-2847-2053)
- R. Fujitani
- P. Giampa (ORCID: https://orcid.org/0000-0003-4403-9989)
- T. Lindner
- W. D. Ramsay
- David Anthony
- T. Okamura
- E. Miller
- A. Zahra
- T. Mohammadi
- John Malcolm
- Charles A. Davis
- M. Zhao
- W. T. H. van Oers
- R. de Vries
- Phyllis Switzer
- K. Drury
- T. Hepworth
- B. Algohi
- A. Jaison
- M. Katotoka
- W. Rathnakela
Institutions
- Oak Ridge National Laboratory (US)
- TRIUMF (CA)
- National Transportation Research Center (US)
- North Carolina State University (US)
- High Energy Accelerator Research Organization (JP)
- University of British Columbia (CA)
- University of Northern British Columbia (CA)
- Simon Fraser University (CA)
- Kyoto University (JP)
- University of Saskatchewan (CA)
- Institute for Integrated Radiation and Nuclear Science, Kyoto University (JP)
- University of Manitoba (CA)
- McGill University (CA)
- Nagoya University (JP)
- The University of Winnipeg (CA)
- Universidad Nacional Autónoma de México (MX)
- The University of Osaka (JP)
Publication Details
- Journal
- EPJ Web of Conferences
- Published
- 2025-01-01
- DOI
- https://doi.org/10.1051/epjconf/202533303004
- Primary Topic
- Nuclear Physics and Applications
- Type
- article
- Field-Weighted Citation Impact
- 0.00
Funders
- Canada Research Chairs
- Universidad Nacional Autónoma de México
- Murata Science Foundation
- Natural Sciences and Engineering Research Council of Canada
- Japan Society for the Promotion of Science
- Dirección General de Asuntos del Personal Académico, Universidad Nacional Autónoma de México