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Pulse shape discrimination in CUPID-Mo using principal component analysis
Abstract CUPID-Mo is a cryogenic detector array designed to search for neutrinoless double-beta decay (0νββ) of 100 Mo. It uses 20 scintillating 100 Mo-enriched Li 2 MoO 4 bolometers instrumented with Ge light detectors to perform active suppression of α backgrounds, drastically reducing the expecte...
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Published in: | Journal of instrumentation 2021-03, Vol.16 (3), p.P03032 |
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Main Authors: | , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , |
Format: | Article |
Language: | English |
Subjects: | |
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Online Access: | Get full text |
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Summary: | Abstract
CUPID-Mo is a cryogenic detector array designed to search for neutrinoless double-beta decay (0νββ) of
100
Mo. It uses 20 scintillating
100
Mo-enriched Li
2
MoO
4
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. |
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ISSN: | 1748-0221 1748-0221 |
DOI: | 10.1088/1748-0221/16/03/P03032 |