München 2006 – wissenschaftliches Programm

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HK: Physik der Hadronen und Kerne

HK 21: Postersitzung

HK 21.64: Poster

Dienstag, 21. März 2006, 15:30–17:00, P

First Results of the Performance of MWPC Prototypes in Test Beams for the CBM Experiment at FAIR — •Melanie Hoppe — Institut für Kernphysik, Münster

The CBM collaboration proposes to build a dedicated heavy-ion experiment to investigate the properties of highly compressed baryonic matter produced in nucleus-nucleus collisions at the future Facility for Antiproton and Ion Research (FAIR) in Darmstadt. The goal of the Compressed Baryonic Matter (CBM) experiment is to explore the QCD phase diagram in the region of high baryon densities not covered by other experiments. CBM will be a fixed target experiment. Among other detectors, it will use a Transition Radiation Detector (TRD) for tracking of charged particles and electron identification. In conjunction with a RICH detector and an electromagnetic calorimeter, the TRD has to provide a sufficient electron identification capability for measurements of charmonium and low-mass vector mesons. The required pion suppression is about a factor of 100 and the required position resolution has to be of the order of 200–300 µm. At the same time the detector has to be able to cope with large particle densities and very high interaction rates. Different prototypes based on MWPCs have been tested in two beam times at GSI and first results on the performance of the detectors will be shown.