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HK: Fachverband Physik der Hadronen und Kerne

HK 16: Instrumentation und Anwendungen

HK 16.4: Talk

Tuesday, March 13, 2007, 15:00–15:15, B

Design of an Endcap DIRC Detector for PANDA — •Markus Ehrenfried, Michael Dueren, Roland Schmidt, Julia Streit-Lehmann, Peter Schoenmeier, and Hasko Stenzel for the PANDA collaboration — II. Physikalisches Institut, Justus-Liebig-Universitaet Giessen, 35392 Giessen

The DIRC (=Detection of Internally Reflected Cherenkov light) technology developed by the BABAR Collaboration allows the construction of very compact PID detectors. Cherenkov light emitted inside a solid state radiator like e.g. a plate of fused silica (quartz) is guided under total internal reflection towards the edge of the radiator where it is detected by a photon readout system. Reconstruction of the Cherenkov angle is possible by a 2-dimensional readout which either detects the projected pattern of the photons in two spacial dimensions or in one spacial dimension in combination with a precise measurement of the light's time of propagation (TOP). This requires an extremely good time resolution in the order of tens of picoseconds. Possible design options for the proposed Endcap DIRC detector for PANDA will be discussed.