Speaker
Description
The Compressed Baryonic Matter spectrometer (CBM) is a future fixed-target heavy-ion experiment located at the Facility for Anti-proton and Ion Research (FAIR) in Darmstadt, Germany. The key element in CBM providing hadron identification at incident beam energies between 2 and 35 AGeV will be a 120 m2 large Time-of-Flight (ToF) wall composed of Multi-gap Resistive Plate Chambers (MRPC) with a system time resolution better than 80 ps. Aiming for an interaction rate of 10 MHz for Au+Au collisions the MRPCs have to cope with an incident particle flux between 0.1~kHz/cm2 and 25~kHz/cm2 depending on their location. Characterized by granularity and rate capability the actual design of the ToF-wall foresees 4 different counter types called MRPC1 – MRPC4. In order to elaborate the final MRPC design of these counters several heavy-ion in-beam tests were performed at different facilities. In this contribution we present performance studies under realistic load condition of an impedance-matched fully-differential single high voltage (HV) stack MRPC. Work was supported partially by BMBF 05PRVHC7 and by EU/FP7-HadronPhysics3/WP19.
