3 research outputs found
Estimated performance of the TRIUMF ultracold neutron source and electric dipole moment apparatus
Searches for the permanent electric dipole moment of the neutron (nEDM)
provide strong constraints on theories beyond the Standard Model of particle
physics.
The TUCAN collaboration is constructing a source for ultracold neutrons (UCN)
and an apparatus to search for the nEDM at TRIUMF, Vancouver, Canada.
In this work, we estimate that the spallation-driven UCN source based on a
superfluid helium converter will provide polarized
UCN at a density of ~UCN/cm to a room-temperature EDM experiment
per fill.
With neutrons detected after the Ramsey cycle,
the statistical sensitivity for an nEDM search per storage cycle will be
cm (1).
The goal sensitivity of cm (1) can be reached within
measurement days.Comment: Proceedings submitted to EPJ Web of Conferences for the Symposium on
Symmetries in Subatomic Physics (SSP2022
The Precision nEDM Measurement with UltraCold Neutrons at TRIUMF
The TRIUMF Ultra-Cold Advanced Neutron (TUCAN) collaboration aims at a
precision neutron electric dipole moment (nEDM) measurement with an uncertainty
of , 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.Comment: Proceedings of the 24th International Spin Symposium (SPIN 2021),
18-22 October 2021, Matsue, Japa
A spallation target at TRIUMF for fundamental neutron physics
Ultracold neutrons (UCNs) are a powerful tool for probing the Standard Model at high precision. The TRIUMF Ultracold Advanced Neutron (TUCAN) collaboration is building a new UCN source to provide unprecedented densities of UCNs for experiments. This source will use a tantalum-clad tungsten spallation target, receiving up to 40 µA of 480-MeV protons from TRIUMF’s main cyclotron. The beamline and target were constructed from 2014 to 2016 and operated at beam currents up to 10 µA from 2017 to 2019 as part of a prototype UCN source. We describe the design choices for the target and target-handling system, as well as our benchmarking of the target performance using UCN production measurements