Characterization of Silicon Detectors at the Manitoba Proton Source for Low-Energy Particle Physics
ORAL
Abstract
The Neutron-a-b (Nab) experiment hosted at Oak Ridge National Laboratory’s Spallation Neutron Source is a sensitive probe of the weak interaction via free neutron beta decay. With a goal of 1.2⋅10-3 relative precision on a and 3⋅10-3 precision on b, this experiment will speak to the discrepancies in λ, the ratio of axial-vector to vector coupling, and the unitarity of the CKM matrix via a determination of Vud. Energy and timing of the decay electrons and protons are quantified with a pair of large-area, thick, segmented silicon detectors. The low–energy steerable proton source located at the University of Manitoba was used to simulate neutron decay protons, in tandem with some low-energy X-ray and beta sources. This talk will overview the capabilities of the facility, and the various studies performed to determine optimal detector running conditions within the Nab experiment.
*We acknowledge the support of the Natural Sciences and Engineering Research Council of Canada (NSERC) and the Canadian Foundation for Innovation (CFI).This research was sponsored by the U.S. Department of Energy (DOE), Office of Science, Office of Nuclear Physics [contract DE-AC05-00OR22725]
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Presenters
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August G Mendelsohn
- University of Manitoba