Mainz 2012 – scientific programme

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HK: Fachverband Physik der Hadronen und Kerne

HK 5: Instrumentation

HK 5.2: Talk

Monday, March 19, 2012, 14:30–14:45, P 3

Response of the Prototype for the PANDA Barrel EMC to 15 GeV Positrons* — •Markus Moritz, Daniel Bremer, Tobias Eißner, Peter Drexler, and Rainer Novotny — 2. Physikalisches Institut, Universität Giessen

The electromagnetic calorimeter of the PANDA target spectrometer is one of the central detector components to achieve the proposed physical goals, in particular due to the expected performance and efficiency for photons and electrons over a extremely wide energy range. Beside a good energy resolution of the device based on lead tungstate, it is necessary as well to achieve a sufficient position and time information. Therefore, detailed tests of prototypes are necessary. The talk will present the results of a test performed at CERN SPS with the prototype PROTO60, which represents a subsection of the barrel detector and consists of a 6 × 10 matrix of tapered crystals. A 15 GeV positron beam was used impinging at different positions. The report describes the analysis procedure, including the calibration with cosmic muons and muon beam, algorithms for position reconstruction and applied corrections. It finally summarizes the achieved results with respect to energy, position and time resolution.
*Work supported by BMBF, GSI and HIC for FAIR