Bonn 2010 – scientific programme

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HK: Fachverband Physik der Hadronen und Kerne

HK 31: Instrumentierung VI

HK 31.4: Talk

Tuesday, March 16, 2010, 17:30–17:45, HG IX

Experimental studies for a DIRC detector at the WASA-at-COSY experiment — •Adrian Schmidt, Christoph Adolph, Wolfgang Eyrich, Julian Jaus, Andreas Teufel, and Christian Vogel — Physikalisches Institut IV der Universität Erlangen-Nürnberg

The WASA-at-COSY experiment at the Forschungszentrum Jülich provides a nearly 4π detector including a forward spectrometer especially for studies on η− and η′−meson decays in proton-proton collisions. Simulations have shown that an additional Detector of Internally Reflected Cherenkov light (DIRC) in front of the Forward Range Hodoscope improves the particle identification and energy resolution significantly. We report on the results of first DIRC prototype tests which show the feasibility. To optimize the detector new super and ultra cathode photomultiplier tubes (Hamamatsu Type H6568 an R8900) with high quantum efficiency were studied and their main properties will be presented.
supported by German BMBF and FZ Jülich