The Precision nEDM Measurement with UltraCold Neutrons at TRIUMF

TL;DR

This paper discusses the development of a high-precision neutron electric dipole moment measurement using ultra-cold neutrons at TRIUMF, aiming for an order-of-magnitude improvement over current limits to test supersymmetry.

Contribution

It reports on the development of a new high-intensity ultracold neutron source and a spectrometer for precise nEDM measurement, advancing experimental capabilities.

Findings

Development of a super-thermal UCN source in superfluid helium

Progress in constructing a high-precision nEDM spectrometer

Achieving an uncertainty goal of 10^{-27} e·cm in nEDM measurement

Abstract

The TRIUMF Ultra-Cold Advanced Neutron (TUCAN) collaboration aims at a precision neutron electric dipole moment (nEDM) measurement with an uncertainty of $10^{-27}\,e\cdot\mathrm{cm}$, which is an order-of-magnitude better than the current nEDM upper limit and enables us to test Supersymmetry. To achieve this precision, we are developing a new high-intensity ultracold neutron (UCN) source using super-thermal UCN production in superfluid helium (He-II) and a nEDM spectrometer. The current development status of them is reported in this article.