Bochum 2018 – wissenschaftliches Programm

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HK: Fachverband Physik der Hadronen und Kerne

HK 52: Poster

HK 52.25: Poster

Donnerstag, 1. März 2018, 16:30–18:45, Audimax Foyer

Assignment of Avalanche Photodiodes with respect to their operational parameters — •Benjamin Wohlfahrt¹, Kai-Thomas Brinkmann¹, Gerrit Eichner², Christopher Hahn¹, Markus Moritz¹, Andrea Wilms³, and Hans-Georg Zaunick² for the PANDA collaboration — ¹II. Physikalisches Institut, Justus-Liebig-Universität Gießen — ²Mathematisches Institut, Justus-Liebig-Universität Gießen — ³GSI Helmholtzzentrum für Schwerionenforschung, Darmstadt

The PANDA experiment will investigate physics in the strong interaction regime utilizing antiproton-proton annihilations. The PANDA detector will comprise a Target Spectrometer as well as a Forward Spectrometer. In the target region, a barrel-shaped electromagnetic calorimeter with end-caps on both sides will be used. It will play a major role in detecting photons utilizing about 15500 PbWO4 crystals. Each of these crystals is read out by two independent Avalanche Photo Diodes. To ensure a close-as-possible similar behaviour, an optimization algorithm groups APDs into pairs based on a distance function applied to a number of selection-criteria. A threshold scan of the distance function gathers the best matching criterion. Hence, a model selection has been performed to obtain most precise operating parameters out of the APD measurements. *The Project is supported by BMBF and HIC for FAIR