Characterization of the scintillation time response of liquid argon detectors for dark matter search

The scintillation time response of liquid argon has a key role in the discrimination of electronic backgrounds in dark matter search experiments. However, its extraordinary rejection power can be affected by various detector effects such as the delayed light emission of TetraPhenyl Butadiene, the mo...

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Bibliographic Details
Published in:arXiv.org 2021-10
Main Authors: Agnes, P, De Cecco, S, Fan, A, Fiorillo, G, Franco, D, Galbiati, C, Giganti, C, Korga, G, Lebois, M, Mandarano, A, Martoff, C J, Pagani, L, Pantic, E, Razeto, A, Renshaw, A L, Riffard, Q, Schlitzer, B, Tonazzo, A, Wang, H, Wilson, J N
Format: Article
Language:English
Subjects:
Argon
Butadiene
Dark matter
Data acquisition
Discrimination
Electric fields
Light emission
Pulse shape
Scintillation
Time response
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Summary:The scintillation time response of liquid argon has a key role in the discrimination of electronic backgrounds in dark matter search experiments. However, its extraordinary rejection power can be affected by various detector effects such as the delayed light emission of TetraPhenyl Butadiene, the most commonly used wavelength shifter, and the electric drift field applied in Time Projection Chambers. In this work, we characterized the TetraPhenyl Butadiene delayed response and the dependence of the pulse shape discrimination on the electric field, exploiting the data acquired with the ARIS, a small-scale single-phase liquid argon detector exposed to monochromatic neutron and gamma sources at the ALTO facility of IJC Lab in Orsay.
ISSN:2331-8422
DOI:10.48550/arxiv.2110.05350