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Erlangen 2001 – wissenschaftliches Programm

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HK: Physik der Hadronen und Kerne

HK 9: Postersitzung: Instrumentation und Anwendungen

HK 9.4: Poster

Dienstag, 20. März 2001, 10:30–12:45, R

Performance of the HADES - RICH Detector — •A. Elhardt, M. Böhmer, T. Eberl, L. Fabbietti, J. Friese, R. Gernhäuser, J. Homolka, A. Kastenmüller, H.-J. Körner, M. Münch, B. Sailer, W. Schön, S. Schröder, S. Winkler, and K. Zeitelhack — Technische Universität München, James-Franck-Strasse 1, D-85748 Garching

A fast Ring Imaging Cherenkov detector (RICH) is the central device of the new dilepton spectrometer HADES at GSI, Darmstadt. It serves as a hadron blind trigger device for e+e pairs in hadron and heavy ion induced collisions at 1-2 AGeV incident energy. The RICH consists of a C4F10 gas radiator, a spherical VUV-mirror, a VUV transparent CaF2 window, and a set of six multiwire proportional chambers with pad cathodes covered by a solid CsI photon converter. The photon detector is equipped with FE electronics based on the GASSIPLEX chip and a fast, multi pipeline data readout for the 27.000 channels. The RICH is operational since 1 year and has been used successfully in two beam times. We report on the detector performance and the results obtained for e± identification in heavy ion collisions. supported by BMBF (6TM970I) and GSI (TM-FR1).

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