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T: Fachverband Teilchenphysik

T 17: Halbleiter 1

T 17.2: Talk

Monday, March 24, 2014, 11:15–11:30, P105

Investigation of Silicon-Photomultipliers for cryogenic experiments — •Eugen Engelmann — Technische Universität München, Phys.Dep. E15, James-Franck-Straße, 85748 Garching

It has already been demonstrated that Silicon-Photomultipliers (SiPMs) work at cryogenic temperatures, having a dark-count-rate (DCR) below 1Hz/mm². Despite the low DCR, the largest devices still have less than a cm² sensitive area. SiPMs with larger sensitive area would be especially interesting for low background experiments like dark matter and neutrinoless double beta decay experiments using cryogenic noble liquids as detection medium. In order to develop larger arrays for low temperature applications, the electronic properties of the SiPMs has to be studied at these temperatures. We will present temperature dependent measurements of the afterpulse-probability and the DCR. Additionally, Spice simulations of large SiPMs arrays will be presented.