Pulse shape discrimination in CUPID-Mo using principal component analysis
Name
2010.04033.pdf
Description
Accepted version
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562.96 KB
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Adobe PDF
Checksum (MD5)
7c0aaff7b69355ae971d2fbe75942c06
Author(s)
Winslow, Lindley
Date Issued
2021
Journal
Journal of Instrumentation
Publisher
IOP Publishing
Citation
Winslow, Lindley. 2021. "Pulse shape discrimination in CUPID-Mo using principal component analysis." Journal of Instrumentation, 16 (03).
Version
Author's final manuscript
Abstract
Abstract
CUPID-Mo is a cryogenic detector array designed to search for neutrinoless double-beta decay (0νββ) of 100Mo. It uses 20 scintillating 100Mo-enriched Li2MoO4 bolometers instrumented with Ge light detectors to perform active suppression of α backgrounds, drastically reducing the expected background in the 0νββ signal region. As a result, pileup events and small detector instabilities that mimic normal signals become non-negligible potential backgrounds. These types of events can in principle be eliminated based on their signal shapes, which are different from those of regular bolometric pulses. We show that a purely data-driven principal component analysis based approach is able to filter out these anomalous events, without the aid of detector response simulations.
CUPID-Mo is a cryogenic detector array designed to search for neutrinoless double-beta decay (0νββ) of 100Mo. It uses 20 scintillating 100Mo-enriched Li2MoO4 bolometers instrumented with Ge light detectors to perform active suppression of α backgrounds, drastically reducing the expected background in the 0νββ signal region. As a result, pileup events and small detector instabilities that mimic normal signals become non-negligible potential backgrounds. These types of events can in principle be eliminated based on their signal shapes, which are different from those of regular bolometric pulses. We show that a purely data-driven principal component analysis based approach is able to filter out these anomalous events, without the aid of detector response simulations.
MIT Department
Massachusetts Institute of Technology. Department of Physics
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Attribution-NonCommercial-ShareAlike 4.0 International
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DOI of Published Version
https://doi.org/10.1088/1748-0221/16/03/P03032
