Bonn 2010 – scientific programme

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HK: Fachverband Physik der Hadronen und Kerne

HK 57: Instrumentierung XI

HK 57.6: Talk

Thursday, March 18, 2010, 18:00–18:15, HG VIII

Performance of the Performance of the PROTO60 - Prototype for the PANDA Barrel EMC — •Daniel Bremer, Peter Drexler, Markus Moritz, and Rainer Novotny — II. 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, inparticular 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 excellent results of a test performed at the tagged photon facility of MAMI Mainz with the prototype PROTO60, which represents a subsection of the barrel detector and consists of a 6 × 10 matrix of tapered crystals. A tagged photon beam with energies between 0.15 GeV and 1.4 GeV was used impinging at different beam position. The report describes the analysis procedure, including the calibration with cosmic muons, algorithms for position reconstruction and applied corrections. It finally summarizes the achieved results with respect to energy, position and time resolution.