Mainz 2012 – scientific programme

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HK: Fachverband Physik der Hadronen und Kerne

HK 53: Poster – Instrumentation

HK 53.12: Poster

Thursday, March 22, 2012, 14:00–16:00, P Foyer

A Disc-DIRC for Experiments at WASA and as a Test Detector for PANDA^* — •Evgueny Doroshkevich — Physikalisches Institut, Univ. Tübingen

For a precise measurement of the velocity of highly relativistic particles the detection of Cherenkov light is very attractive. Detectors based on the Detection of Internally Reflected Cherenkov Light (DIRC) - first built and used in the BaBar experiment - are also planned for the PANDA detector at FAIR, both in form of a barrel-DIRC and in form of a disc-DIRC. In both cases the Cherenkov rings are reconstructed from the internally reflected Cherenkov light deflected into position sensitive detectors.

For the WASA Forward Detector setup a Disc-DIRC quarter has been built, which serves both as a test module for PANDA and an important upgrade of the WASA detector [1]. For an optimal performance at WASA the Disc-DIRC-Quarter is tilted by 20^∘ out of the vertical plane. The internally reflected Cherenkov light is guided to multi-anode photomultipliers by focussing light guides, which are made of plexiglass, i.e. the same material the radiator is made of. Results from first tests in the COSY beam will be reported.

[1] M. Bashkanov et al., JINST 6, C10002 (2011)

^* supported by BMBF and COSY-FFE (FZ Jülich)