Frankfurt 2014 – scientific programme

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HK: Fachverband Physik der Hadronen und Kerne

HK 7: Instrumentierung

HK 7.5: Talk

Monday, March 17, 2014, 15:00–15:15, HZ 9

Simulation and Construction of MWPCs without drift region for the CBM-TRD — •Florian Roether for the CBM collaboration — Institut für Kernphysik, Goethe-Universität Frankfurt

The Compressed Baryonic Matter (CBM) experiment at the future Facility for Antiproton and Ion Research (FAIR) will explore the QCD phase-diagram in the region of high net-baryon densities. The Transition Radiation Detector (TRD) with its multi-layer-design will provide electron identification and contribute to particle tracking.

Each TRD module consists of a radiator and a Read Out Chamber (ROC). The Frankfurt prototypes are narrow Multiwire Proportional Chambers (MWPC) without a drift region and have therefore a short signal collection time, in order to handle the high event rates of up to 10 MHz in the experiment. The loss of transistion radiation is minimized by using an entrance window made of a thin foil. As a deformation of the entrance window could influence the performance of the detector, different methods to minimize this effect have been studied. In this talk the construction of an alternative prototype wire-geometry and simulations of gain variations are presented and different approches to stabilize the gas gain are discussed.

This work is supported by BMBF and the Helmholtz Association.