Bochum 2009 – scientific programme

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HK: Fachverband Hadronen und Kerne

HK 18: Accelerators and Instrumentation I

HK 18.3: Talk

Monday, March 16, 2009, 17:00–17:15, H-ZO 80

The Disc DIRC Cherenkov Detektor at PANDA — •Benno Kröck, Avetik Hayrapetyan, Irina Brodski, Klaus Föhl, Marko Zühlsdorf, Michael Düren, Michael Sporleder, Oliver Merle, Peter Koch, and Peter Schönmeier — II. Physikalisches Institut, Universität Gießen, Gießen, Germany

In the PANDA experiment at FAIR a disc DIRC will provide particle identification in the forward region to cover polar angles between 5 and 22^∘. Two designs exist. One concept uses two space coordinates to measure the Cherenkov angle while the second one uses one space coordinate and the time of propagation (ToP) of the Cherenkov photons. The ToP design requires fast photon detectors on the ≈ 40 ps level. Dispersion causes different propagation times for different wavelengths and has to be considered. Dichroic mirrors are used to reduce dispersion effects by splitting the Cherenkov spektrum into two or more ranges. The performance of the new detector concept has been evaluated by Monte Carlo simulations and reconstruction studies.