Münster 2017 – wissenschaftliches Programm
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T: Fachverband Teilchenphysik
T 115: Kalorimeter (gemeinsam mit HK)
T 115.7: Vortrag
Donnerstag, 30. März 2017, 18:35–18:50, F 234
Response of a prototype for the PANDA barrel EMC to tagged photons in an energy range from 50 MeV to 800 MeV — •Benjamin Wohlfahrt1, Kai-Thomas Brinkmann1, Stefan Diehl1, Christopher Hahn1, Markus Moritz1, Rainer Novotny1, Christoph Rosenbaum1, Andrea Wilms2, and Hans-Georg Zaunick1 for the PANDA collaboration — 1II. Physikalisches Institut, Justus Liebig Universität Gießen — 2GSI Helmholtzzentrum für Schwerionenforschung, Darmstadt
The PANDA experiment will investigate physics in the strongly interacting regime via antiproton - proton annihilations. The PANDA detector will comprise a target spectrometer as well as a dedicated 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 by detecting photons utilizing about 15500 PbWO4 crystals. A subsection of the barrel EMC has been implemented as a prototype, consisting of 120 crystals of which each is read out by two independent Avalanche Photo Diodes. To ensure that the Barrel-EMC fulfills all requirements, the response of this prototype has been tested with tagged photons in an energy range from 50 MeV to 800 MeV at the MAMI-facility in Mainz. This contribution will report about the energy resolution achieved with a 5x5 array of crystals within the prototype and will compare different calibration studies. In addition, the matching procedure of the two APDs for each crystal and their cross-calibration will be discussed. *The Project is supported by BMBF, GSI and HIC for FAIR