Speaker
Description
The Nab collaboration aims to make the world’s most precise, by about a factor of 10, measurement of the electron-neutrino angular correlation parameter “a” and the Fierz interference term “b” in cold neutron beta decay. Along with the neutron lifetime, this will allow the testing of various extensions to the standard model and will help home in on a correct theory describing what makes up our world. Nab is 4m tall asymmetric time of flight spectrometer with custom 100 mm^2, 127 pixel Si detectors on either end. Nab is currently in its commissioning phase at the Spallation Neutron Source at Oak Ridge National Lab in the USA and will collect physics data from 2022-2025. The Canadian Nab group is responsible for testing the novel large area Si detectors used in the experiment where we have built a steerable 30 keV proton accelerator at the University of Manitoba for this purpose. This talk will motivate and provide an overall status of the Nab experiment and present the 30 keV proton source at UofM with recent detector testing results.
