Heidelberg 2015 – scientific programme
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HK: Fachverband Physik der Hadronen und Kerne
HK 32: Instrumentation 12
HK 32.6: Talk
Tuesday, March 24, 2015, 18:15–18:30, M/HS4
Towards the final MRPC design - Performance test with heavy ion beam — •Ingo Deppner and Norbert Herrmann — Physikalisches Institut Uni. Heidelberg, Heidelberg
The Compressed Baryonic Matter spectrometer (CBM) is a future 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 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 conceptual design of
the ToF-wall foresees 4 different counter types called MRPC1 - MRPC4.
In order to elaborate the final MRPC design of these counters a heavy ion test beam time was
performed at GSI. In this contribution we will present performance test results of 2 different
MRPC3 full size prototypes developed at Heidelberg University and Tsinghua University, Beijing.
Work was supported partially by BMBF 05P12VHFC7 and by EU/FP7-HadronPhysics3/WP19.