Münster 2017 – wissenschaftliches Programm

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HK: Fachverband Physik der Hadronen und Kerne

HK 27: Poster

HK 27.60: Poster

Dienstag, 28. März 2017, 16:45–18:45, F Foyer

Feature extraction and calibration concepts for a prototype of the PANDA barrel EMC — •Stefan Diehl, Kai-Thomas Brinkmann, Rainer Novotny, Christoph Rosenbaum, and Hans-Georg Zaunick for the PANDA collaboration — II. Physikalisches Institut, Justus-Liebig-Universität Gießen

The electromagnetic calorimeter (EMC) of the PANDA detector at the future FAIR facility will consist of more than 15,000 lead tungstate (PWO) crystals which are operated at -25 °C to increase the light yield of PWO. It will be one of the central components of PANDA to achieve the physics goals in studying the interaction of cooled antiprotons with a fixed target. The focus of the contribution will be on the barrel part of the target EMC. The signals from the APD read out of the crystals, which are shaped and amplified by a customized ASIC, will be digitized by a sampling ADC. Based on the response of a close-to-final prototype to photons in the energy range between 50 MeV and 800 MeV, different feature extraction and calibration concepts will be compared. It has been shown, that a feature extraction via a fit of the signal shape provides a significant improvement of the energy resolution in the energy range below 100 MeV, compared to a simple peak sensing feature extraction. In addition it has been shown that a calibration based on the energy deposition of cosmic muons, in comparison to detailed GEANT4 simulations, taking all light collection effects into account, can be an excellent first step for a calibration of the calorimeter. *The Project is supported by BMBF, GSI and HIC for FAIR. S. D. is supported by JLU Gießen through a JUST'us scholarship grant.