Bonn 2020 – wissenschaftliches Programm

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T: Fachverband Teilchenphysik

T 61: Methods of astroparticle physics IV

T 61.6: Vortrag

Mittwoch, 1. April 2020, 17:45–18:00, L-3.001

Results of SiPM Pixel Tests in the MAGIC IACT Camera — •Alexander Hahn1,2, Antonios Dettlaff1, David Fink1, Daniel Mazin1,3, Razmik Mirzoyan1, and Masahiro Teshima1,31Max-Planck-Institut für Physik, München, Deutschland — 2Physik-Department, Technische Universität München, München, Deutschland — 3Institute for Cosmic Ray Research, the University of Tokyo, Tokyo, Japan

Large size Imaging Atmospheric Cherenkov Telescopes (IACTs), such as MAGIC, H.E.S.S. or VERITAS, currently in operation or such as LST of CTA in commissioning, are relying on photomultiplier tubes (PMTs) as their primary light detectors. Smaller IACTs (such as FACT or ASTRI) have shown that they can operate with Silicon photomultipliers (SiPMs) instead. However, there is no conclusive study yet whether SiPMs might be also suitable light detectors for large size IACTs. Our group at the Max Planck Institute for Physics built several SiPM based prototype detector modules and installed them to one of the MAGIC telescopes. We operated them since a couple of years in parallel with the existing scientific PMT based camera allowing for a multi-year in-situ comparison of SiPMs and PMTs inside an operational telescope. Here we present a direct performance comparison between SiPM-based and existing PMT-based detector modules being operated in parallel inside the MAGIC imaging camera.

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