Dresden 2013 – wissenschaftliches Programm

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HK: Fachverband Physik der Hadronen und Kerne

HK 53: Poster - Instrumentation II

HK 53.9: Poster

Mittwoch, 6. März 2013, 16:45–19:00, HSZ 3.OG

Foil stretching device for the CBM-TRD — •Kathrin Reuß and Michael Seidl — Institut für Kernphysik Frankfurt

The Compressed Baryionic Matter experiment uses a Transition Radiator Detector for the electron-pion separation. This detector employs a Multiwire Proportional Chamber with a thin mylar-foil coated with aluminium as entrance window. Because of the large area of the foil it is very sensitive to pressure variations. Since the gain stability depends on the gas volume it is important to keep it constant. Thus a good control of the foil tension is mandatory. This is achieved by using a plexiglass frame and heating coils to stretch the foil and reduce the pressure sensitivity. Furthermore we present simulations and measurements of the expansion of the entrance window due to pressure fluctuations.