Dresden 2013 – wissenschaftliches Programm

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HK: Fachverband Physik der Hadronen und Kerne

HK 80: Instrumentation

HK 80.5: Vortrag

Donnerstag, 7. März 2013, 18:00–18:15, HSZ-405

Construction and simulations of full-size CBM-TRD prototypes — •Ernst Hellbär — Institut für Kernphysik, Goethe-Universität Frankfurt

The Compressed Baryonic Matter (CBM) experiment at the future FAIR facility in Darmstadt will explore the QCD phase diagram in the region of high baryon densities. One of the key observables will be charmed particles and vector mesons decaying into leptons or lepton pairs. To provide an efficient electron-pion separation and tracking capability multiple layers of Transition Radiation Detectors (TRD) will be used. The concept of a thin and fast Multiwire Proportional Chamber (MWPC) without drift region is considered with the aim of handling the high event rates in the experiment of up to 10 MHz. A thin foil-based entrance window leads to low transition radiation (TR) absorption probabilities. The development and construction of the first full-size TRD prototypes with this foil-based entrance window will be presented. Simulations of the mechanical stability of the entrance window and the influence on the gas gain of the detector will be shown and resulting design options will be discussed.