# Physics of fundamental Symmetries and Interactions - PSI2019

20-25 October 2019
PSI
Europe/Zurich timezone

## The TRIUMF UltraCold Advanced Neutron source and EDM experiment

22 Oct 2019, 17:46
1m
WHGA/001 - Auditorium (PSI)

Poster

### Speaker

Wolfgang Schreyer (TRIUMF)

### Description

The goal of the TUCAN collaboration is to measure the electric dipole moment (EDM) of the neutron with a sensitivity of $10^{-27}$ ecm. To achieve this within a reasonable time, we are building the world's strongest ultracold-neutron source, based on superthermal conversion of cold neutrons in superfluid helium. At TRIUMF, we recently commissioned a new proton beamline with a beam power of up to 20 kW, a new neutron spallation target, and a protoype ultracold-neutron source developed in Japan, which we use to test components and benchmark our simulations.
Thanks to extensive optimizations with these simulations, we expect the TUCAN source to produce $1.6 \cdot 10^{7}$ ultracold neutrons per second, while keeping the superfluid helium at a temperature of 1.1 K. This would allow us to reach the EDM sensitivity goal within about 400 beam days. The new source is expected to go into operation in 2021.
This presentation will show results of tests with the prototype source, compare them to simulations, and show the design and expected performance of the new TUCAN source and EDM experiment.
This work is supported by NSERC, CFI, and JSPS.