Würzburg 2018 – wissenschaftliches Programm
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T: Fachverband Teilchenphysik
T 69: Experimentelle Methoden der Astroteilchenphysik III
T 69.8: Vortrag
Mittwoch, 21. März 2018, 18:15–18:30, Z6 - SR 2.013
A study of SiPMs as light detectors for the use in imaging atmospheric Cherenkov telescopes — •Alexander Hahn1, David Fink1, Daniel Mazin2, Razmik Mirzoyan1, and Masahiro Teshima2 — 1Max-Planck-Institut für Physik, München, Deutschland — 2Institute for Cosmic Ray Research, the University of Tokyo, Tokyo, Japan
MAGIC is a stereoscopic system of two identical Imaging Atmospheric Cherenkov Telescopes (IACTs) with mirrors of 17 m diameter operated by the MAGIC collaboration on the Canary of Island La Palma. Each of the telescope cameras is equipped with 1039 pixels, based on photomultiplier tubes (PMTs). We developed several prototype detector modules using silicon photomultipliers (SiPMs) as light detectors. The three detector modules consist of assembled matrices based on 6×6 mm2 SiPMs from Excelitas, SensL and Hamamatsu correspondingly. Our aim is to develop a SiPM-based pixel with the same active area as the PMT-based one, and to investigate the possible use of SiPMs as new photo sensors for existing and future large size IACTs. An active summation of the individual SiPM outputs to a combined signal of the assembled matrix was achieved while preserving the fast pulse shape. Special design constraints e.g. the operation at ambient temperature and a high level of background light have been addressed and are compared among our different prototypes. In this talk, we will present the features of our design and compare the SiPM-based modules to the existing PMT ones.