Mainz 2012 – wissenschaftliches Programm

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HK: Fachverband Physik der Hadronen und Kerne

HK 5: Instrumentation

HK 5.6: Vortrag

Montag, 19. März 2012, 15:30–15:45, P 3

Characterisation of a 3x3 Prototype of the Forward Shashlyk EMC of the PANDA detector with photons up to 770 MeV — Stefan Diehl¹, Daniel Bremer¹, Peter Drexler¹, Pavel Semenov², •Rainer Novotny¹, Tobias Eissner¹, and Valery Dormenev¹ — ¹2nd Physics Institute, University Giessen, Germany — ²IHEP Protvino, Russia

The PANDA detector at the future FAIR facility will be used for hadron physics experiments with cooled antiprotons. The detection of high-energetic photons up to 15GeV energy is one of the main tasks, since most of the envisaged physics channels are accompanied by primary or secondary photons. Therefore, a nearly 4 π coverage is mandatory Complementary to the Target-EMC, comprised of PbWO₄ scintillation crystals, the most forward region is covered by a sampling calorimeter of Shashlyk-type. The individual modules consists of several layers of led and plastic scintillator tiles, which are sandwiched together and read out via wavelength shifting (WLS) fibers which are guided through the holes in the lead and scintillator layers, respectively, and read out by photomultipliers at the rear end. The talk will present the results of a response test of a 3x3 prototype matrix developed and build at BTCP, Protvino. The measurement was performed with tagged photons in the energy range between 100 and 770MeV, respectively, at the Mainz Mictrotron (MAMI). The talk will focus primarily on the energy resolution depending on the point of impact of the photon beam. The results are compared to Monte-Carlo simulations and complementary studies at several GeV energy.