Göttingen 2012 – wissenschaftliches Programm
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T: Fachverband Teilchenphysik
T 64: Halbleiterdetektoren: Forschung und Entwicklung 2
T 64.3: Vortrag
Dienstag, 28. Februar 2012, 17:15–17:30, ZHG 001
Study of detection efficiency distribution and areal homogeneity of SiPMs — •Michal Tesař, Christian Jendrysik, Frank Simon, Jelena Ninković, Hans-Günther Moser, and Rainer Richter — Max Planck Institut for Physics, Munich, Germany
Silicon photomultipliers (SiPM) are a very attractive option for light detection in highly granular scintillator-based sampling calorimeters in future high energy physics experiments at Linear Colliders (ILC, CLIC). The CALICE collaboration has already successfully operated a 1 m3 physics prototype with about 8 000 small scintillator tiles, each read out by a SiPM, demonstrating the power of this new technology. We have developed a setup for the measurement of relative photon detection efficiency (PDE), crosstalk probability and other important characteristics of SiPMs to study the performance of different devices. The precise positioning system of the setup together with excellent focusing of the light source provides scanning capabilities that allow a study of the spatial distributions of PDE, crosstalk etc. over large sensor areas with sub-pixel resolution. A brief description of the setup, final results of a study of two types of Hamamatsu MPPCs and first scans of SiMPl devices, developed at MPI Semiconductor Lab, will be presented.