The TUCAN Neutron Electric Dipole Moment Experiment
March 24, 2022
The goal of the TRIUMF Ultra-Cold Advanced Neutron (TUCAN) Collaboration is to successfully make an new measurement of the neutron electric dipole measurement (nEDM) experiment with an uncertainty of 1 × 10−27 e-cm in 400 days of run time, a one order of magnitude improvement compared to the current world’s best. The experiment is unique in using a spallation-driven superfluid helium (He-II) source of ultracold neutrons (UCN). We are now at the stage of upgrading the UCN source to produce world-leading UCN densities, using a new He-II cryostat that has undergone cryogenic testing at KEK in 2020-21. We are also assembling the experimental components of the EDM experiment, including a magnetically shielded room, coils, and atomic magnetometers.
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