Darmstadt 2016 – scientific programme

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HK: Fachverband Physik der Hadronen und Kerne

HK 59: Instrumentation XVI

HK 59.4: Talk

Thursday, March 17, 2016, 17:30–17:45, S1/01 A3

CBM RICH geometry optimization* — •Tariq Mahmoud and Claudia Höhne for the CBM collaboration — II. Physikalisches Institut, Gießen; Deutschland

The Compressed Baryonic Matter (CBM) experiment at the future FAIR complex will investigate the phase diagram of strongly interacting matter at high baryon density and moderate temperatures in A+A collisions from 2-11 AGeV (SIS100) beam energy. The main electron identification detector in the CBM experiment will be a RICH detector with a CO₂ gaseous-radiator, focusing spherical glass mirrors, and MAPMT photo-detectors being placed on a PMT-plane. The RICH detector is located directly behind the CBM dipole magnet. As the final magnet geometry is now available, some changes in the RICH geometry become necessary. In order to guarantee a magnetic field of 1 mT at maximum in the PMT plane for effective operation of the MAPMTs, two measures have to be taken: The PMT plane is moved outwards of the stray field by tilting the mirrors by 10 degrees and shielding boxes have been designed. In this contribution the results of the geometry optimization procedure will be presented.

(*Gefördert durch das LOEWE Zentrum HIC for FAIR und BMBF 05P15 RGFCA)