SMuK 2023 – wissenschaftliches Programm
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HK: Fachverband Physik der Hadronen und Kerne
HK 13: Instrumentation IV
HK 13.1: Vortrag
Dienstag, 21. März 2023, 17:00–17:15, SCH/A251
SiPM-characteristics after proton irradiation — •Vincent Verhoeven1, Dieter Grzonka3, and James Ritman1,2,3 — 1GSI Helmholtzzentrum für Schwerionenforschung GmbH, 64291 Darmstadt, Germany — 2Ruhr-Universität Bochum, Institut für Experimentalphysik I, 44801 Bochum, Germany — 3Institut für Kernphysik, Forschungszentrum Jülich, 52428 Jülich, Germany
Silicon photomultipliers (SiPM) are frequently used for the photon read out of scintillation detectors as an alternative to a conventional photomultiplier. SiPMs exhibit a high photon detection efficiency in the order of 40%, achieve internal amplifications of 106 to 107, require rather low operating voltages, are insensitive to magnetic fields and, due to the small size, simplify the mechanical construction of detector components. A drawback is the sensitivity of SiPMs to irradiation resulting in a remarkable change of the behavior already at a rather low radiation dose.
In order to determine the effect of irradiation for the SiPM operation as photon sensors, the characteristics of SiPMs after irradiation with a 35 MeV proton beam have been studied. In addition to the basic properties, the performance as a photon detector at various photon numbers was investigated. With a bake-out at temperatures of up to 150 ∘C a regeneration to a certain degree was achieved.
The characteristics of SiPMs as a function of radiation dose and its possible regeneration at high temperatures will be presented.