Frankfurt 2014 – wissenschaftliches Programm
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HK: Fachverband Physik der Hadronen und Kerne
HK 22: Instrumentierung
HK 22.1: Vortrag
Dienstag, 18. März 2014, 14:00–14:15, HZ 9
Response of a Prototype for the PANDA Barrel EMC to Tagged Photons in the Energy Range from 750 MeV up to 3.2 GeV — •Stefan Diehl1, Christoph Rosenbaum1, Daniel Bremer1, Peter Drexler1, Tobias Eissner1, Till Kuske1, Markus Moritz1, Rainer W. Novotny1, Christoph Schmidt2, Ulrike Thoma2, and Christoph Wendel2 for the PANDA collaboration — 12nd Physics Institute, University Gießen — 2HISKP, University Bonn
The PANDA detector at FAIR will be used to study the interaction of antiprotons in a fixed target experiment. The electromagnetic calorimeter (EMC) of the target spectrometer, consisting of >15,000 PWO crystals, with its expected excellent performance and efficiency for photons, will be one of the central components to achieve the physical goals. The required energy, position and time resolutions were confirmed and optimized with prototype detectors. This contribution will report on response measurements of a subsection of the barrel EMC, with a 6x10 matrix of tapered crystals (PROTO60), using tagged photons in an energy range from 0.75 up to 3.2 GeV at the ELSA facility in Bonn. The report will describe the analysis including the data extraction from the sampling ADCs, the calibration with cosmic muons and the achieved resolutions. In addition, the influence of dead material in front of the EMC was studied simulating inner detectors of PANDA. Another focus will be on the position dependence of the energy resolution within the crystal and the implementation of higher order energy correction algorithms. *Supported by BMBF, GSI, HIC for FAIR