Heidelberg 2015 – wissenschaftliches Programm
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HK: Fachverband Physik der Hadronen und Kerne
HK 14: Instrumentation 6
HK 14.2: Vortrag
Montag, 23. März 2015, 17:30–17:45, M/HS4
Response of a Close to Final Prototype for the Barrel of the PANDA Electromagnetic Calorimeter to Photons at Energies below 1 GeV — •Christoph Rosenbaum1, Stefan Diehl1, Valery Dormenev1, Peter Drexler1, Myroslav Kavatsyuk2, Till Kuske1, Svetlana Nazarenko1, Rainer W. Novotny1, Phillippe Rosier3, Andrej Ryantzev4, Peter Wieczorek5, Andrea Wilms5, and Hans-Georg Zaunick1 — 1II. Physikalisches Instiut, University Gießen — 2KVI Groningen, The Netherlands — 3IPN Orsay, France — 4IHEP Protvino, Russia — 5GSI Helmholtzzentrum für Schwerionenforschung, Darmstadt
The EMC of the PANDA detector is one of the central components to achieve the proposed physical goals. The barrel part of the EMC will consist of more than 11,000 lead tungstate (PWO-II) crystals operated at -25°C to achieve the required performance over the complete energy range. The most recent prototype PROTO120 represents a larger section of a barrel slice, containing the most tapered crystals. The readout is performed with two rectangular large area APDs per crystal, which are read out separately via the specially developed APFEL-ASIC, providing a large dynamic range, low power consumption and optimized shaping. The present contribution will show the response of the PROTO120 to photons in the energy range below 800 MeV. It will focus on the performance of the ASIC under real conditions and describe the analysis procedure including the signal extraction and obtained energy resolution using the information from both APDs. * The Work is supported by BMBF, GSI and HIC for FAIR