Neutron EDM Experiment with an Advanced Ultracold Neutron Source at TRIUMF
Abstract
The TRIUMF Ultracold Advanced Neutron (TUCAN) collaboration has been developing a high-intensity ultracold neutron (UCN) source aimed at searching for the neutron electric dipole moment (EDM) with a sensitivity goal of . This article reports on recent progress in commissioning of the UCN source and in the development of the neutron EDM spectrometer. In its final configuration, the accelerator-driven super-thermal UCN source will enable a neutron EDM experiment with two orders of magnitude improved statistics compared to the current best experiment. Substantial progress in 2024 allowed the collaboration to operate the complete source system, with the exception of the liquid deuterium cold moderator, resulting in the first production of UCNs. The status of the EDM spectrometer is also presented, with emphasis on UCN handling components and magnetic subsystems relevant to field control, shielding, and magnetometry.
Keywords
Cite
@article{arxiv.2507.05278,
title = {Neutron EDM Experiment with an Advanced Ultracold Neutron Source at TRIUMF},
author = {T. Higuchi and B. Algohi and D. Anthony and L. Barrón-Palos and M. Bradley and A. Brossard and T. Bui and J. Chak and R. Chiba 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 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 Z. Mao and C. Marshall and J. W. Martin 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 K. Qiao and W. D. Ramsay and W. Rathnakela and D. Salazar and J. Sato and W. Schreyer and T. Shima and H. M. Shimizu and S. Sidhu and S. Stargardter and P. Switzer and I. Tanihata and Tushar and S. Vanbergen and W. T. H. van Oers and Y. Watanabe and N. Yazdandoost and Q. Ye and A. Zahra and M. Zhao},
journal= {arXiv preprint arXiv:2507.05278},
year = {2026}
}
Comments
Presented at the Tenth Meeting on CPT and Lorentz Symmetry, Bloomington, Indiana, May 15-19, 2025