Karlsruhe 2011 – scientific programme
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T: Fachverband Teilchenphysik
T 62: Halbleiterdetektoren II
T 62.7: Talk
Tuesday, March 29, 2011, 18:15–18:30, 30.21: 001
Precision measurement of photon detection efficiency of silicon photomultipliers — •Michal Tesar, Johannes Sailer, Christian Jendrysik, Frank Simon, Jelena Ninkovic, 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 setup for measurement of the photon detection efficiency (PDE) of SiPMs to study the performance of new devices. The precise positioning system of the setup, along with excellent focusing of the light source provide scanning capabilities which allow the study of the homogeneity of the PDE both over the large area of the device and within the single microcell. A description of the setup as well as first measurement results will be presented.