Dortmund 2021 – scientific programme
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T: Fachverband Teilchenphysik
T 72: Experimental techniques in astroparticle physics III
T 72.7: Talk
Wednesday, March 17, 2021, 17:30–17:45, Tv
Modeling the response of non-uniform SiPM arrays — •Christoph Wiesinger, Patrick Krause, Stefan Schönert, and Mario Schwarz — Physik-Department, Technische Universität München, Garching
With typical silicon photomultipliers (SiPMs) having a photo-sensitive area of O(1) cm2, large-scale installations of >1 m2 photo coverage still represent a technical challenge. The usual workaround is to use light guides, e.g. optical fibers, and/or a common read-out of multiple SiPMs in a parallel array configuration. As it is not necessarily granted that each device features equal response, non-uniformities have to be considered an additional source of non-linearity. An analytical response model providing a continuous description of SiPM array spectra, containing on-top optical crosstalk and afterpulsing, has been developed. Its application is intended for the upcoming LEGEND experiment, where secondary event information is provided by scintillation light read-out at liquid argon temperatures.