SMuK 2023 – wissenschaftliches Programm
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T: Fachverband Teilchenphysik
T 18: Exp. Methods, CTA, others
T 18.2: Vortrag
Montag, 20. März 2023, 16:45–17:00, POT/0081
Performance of SiPM test pixel operation in the MAGIC IACT PMT camera — •Alexander Hahn1, Razmik Mirzoyan1, Antonios Dettlaff1, David Fink1, Daniel Mazin1,2, and Masahiro Teshima1,2 — 1Max Planck Institute for Physics, Munich, Germany — 2Institute for Cosmic Ray Research, The University of Tokyo, Kashiwa City, Japan
All currently operating large Imaging Atmospheric Cherenkov Telescopes (IACTs), such as MAGIC, H.E.S.S., or VERITAS, or such as CTA's LST presently being commissioned, use photomultiplier tubes (PMTs) as primary light detectors. It has been shown that smaller IACTs such as FACT and ASTRI can operate with Silicon photomultipliers (SiPMs) instead. However, it is an open research question whether SiPMs may also be suitable as light detectors for large-scale IACTs. To address this question, we have built several SiPM-based prototype detector modules at the Max Planck Institute for Physics. The first module, based on SiPMs from Excelitas, was installed in the PMT-based MAGIC-I imaging camera in May 2015, while two more modules, one using SiPMs from Hamamatsu and another one from SensL, were installed in 2017. Since then, all these modules have been operated in parallel with the PMT camera. Here we present a multi-year in situ study of SiPMs and PMTs in an operational IACT and present a direct performance comparison between the two detector types.