Köln 2004 – scientific programme

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HK: Physik der Hadronen und Kerne

HK 39: Instrumentation and Applications V

HK 39.1: Group Report

Thursday, March 11, 2004, 13:30–14:00, C

The Electromagnetic Calorimeter of PANDA — •Rainer Novotny — 2nd Physics Institute, University Giessen

Experiments with the cooled antiproton beam at the future accelerator facility at GSI, Darmstadt, will be performed with the 4 π detector PANDA, which comprises a high resolution, compact and fast homogeneous electromagnetic calorimeter to detect photons between 10 MeV and 10 GeV energy inside a superconducting solenoid. Lead tungstate (PWO) and BGO are considered as the most appropriate scintillator materials. In order to achieve sufficient energy and time resolution at low energies an experimental program has been started to improve significantly the luminescence yield of PWO by appropriate doping and/or structural perfection. In addition, an efficient photo sensor to be operated within the magnetic field is mandatory. The development of large size avalanche photo diodes has been started. The presentation will cover in detail the instrumental requirements, the design concept and the expected performance of the calorimeter. First results achieved with prototype detectors will illustrate the quality, radiation hardness and performance of new generation crystals as well as the response and applicability of several alternative photo sensors.