Heidelberg 2015 – scientific programme

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HK: Fachverband Physik der Hadronen und Kerne

HK 21: Instrumentation 7

HK 21.6: Talk

Tuesday, March 24, 2015, 16:00–16:15, M/HS1

Mosaic diamond based detector for MIPs detection, T0 determination and triggering in HADES. — Jerzy Pietraszko and •Wolfgang Koenig for the HADES collaboration — GSI Helmholtzzentum für Schwerionenforschung GmbH, Darmstadt

The CVD based diamond detectors were successfully used for HI detection in HADES already in 2001. In the following experiments the polycrystalline diamond material showed very good performance (time resolution below 50 ps sigma) and stable long term operation.

Detection of the minimum ionising particles (MIPs) by means of the diamond detectors is a challenging task mainly because of very small energy deposit in the diamond material. In this case the single crystalline CVD diamond material has to be used which is well known for its excellent charge collection efficiency (almost 100 %) and for its very good timing properties. For pion induced experiments at HADES a large area, segmented, position sensitive, operated in vacuum detector was developed. The construction of the detector will be presented along with the requirements and the obtained performance.

*This work has been supported by BMBF (06 FY 9100 I), HIC for FAIR, EMMI and GSI