Berlin 2005 – wissenschaftliches Programm
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HK: Physik der Hadronen und Kerne
HK 22: Postersitzung
HK 22.44: Poster
Montag, 7. März 2005, 16:30–18:00, TU MA141
A high-rate GEM based TPC for PANDA — •Quirin Weitzel, Bernhard Ketzer, Igor Konorov, Sebastian Neubert, Stephan Paul, and Lars Schmitt — Physik Department, TU München, D-85748 Garching
PANDA is a universal detector system to study fundamental questions of hadron physics in p p interactions. It is designed as an internal target detector at the antiproton storage ring HESR, which is planned in the context of the future research center FAIR at Darmstadt. In order to fulfill the proposed rich physics program, an excellent 4π charged particle tracking system is required. Minimal material budget, momentum resolution on the ∼ % level and good particle identification for a wide momentum range are mandatory. A possible solution for the central tracker of PANDA fulfilling all these requirements is a Time Projection Chamber (TPC). The continuous beam structure at the HESR in combination with interaction rates of the order of 107/s, however, poses a big challenge for such a detector. The feedback of ions into the drift region is intrinsically suppressed in a Gas Electron Multiplier (GEM), thus opening the possibility to operate the TPC in an ungated mode without accumulating excessive space charge. The technical design of such a device implemented in PANDA as well as concepts and ideas to cope with the high event rate will be introduced. First simulation results are presented as well as prototype developments.
† supported by Maier-Leibniz-Labor der TU und LMU Muenchen, BMBF and EU