Münster 2011 – wissenschaftliches Programm

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HK: Fachverband Physik der Hadronen und Kerne

HK 7: Instrumentierung I

HK 7.5: Vortrag

Montag, 21. März 2011, 15:00–15:15, HS1

Performance of TRD Prototypes for the CBM Experiment — •Cyrano Bergmann — Institut für Kernphysik, WWU Münster

CBM is a fixed target experiment at the future FAIR facility. The CBM Transition Radiation Detector (TRD) is geometrically arranged in three stations composed of four layers each. It consists of 1200 individual detector chambers with about 1.3 million readout channels covering a total area of roughly 1110 m². Apart from providing charged particle tracking it is the key detector to provide electron identification through suppression of pions. Based on the ALICE TRD two small prototype modules have been designed in Münster, which can be scaled up to the final size of TRD module. In November 2010 the two prototypes were tested in a common CBM beam test at the CERN Proton Synchroton with particle momenta up to 6 GeV/c. In addition, for the first time a time sampling Self-triggered Pulse Amplification and Digitization asIC (SPADIC) was used to readout the TRD modules. The objectives of the beam test included measurements of: electron identification performance, position resolution and dependence of detector response on variation of incident particle angle, gas mixtures, drift and anode voltage settings and particle momenta. first results from this beam test will be presented. Work supported by BMBF and the HadronPhysics2 project financed by EU-FP7.