Bochum 1998 – scientific programme
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HK: Hadronen und Kerne
HK 47: Instrumentation V, Detector Systems
HK 47.5: Talk
Wednesday, March 18, 1998, 15:30–15:45, A
Performance of the HADES-RICH prototype∗ — •K. Zeitelhack, J. Friese, R. Gernh"auser, J. Homolka, A. Kastenm"uller, P. Kienle, H.-J. Körner, P. Maier-Komor, M. M"unch, C. Theurer, A. Ulrich, and J. Wieser — Physik-Department E12, Technische Universit"at M"unchen, James-Franck Str. 1, D-85748 Garching
A fast Ring Imaging Cherenkov Detektor (RICH) will act as a hadron blind trigger device in the dilepton spectrometer HADES at GSI Darmstadt to identify e+e−-pairs from meson decay produced in central heavy ion collisions at Ekin ≃ 1 A · GeV. The RICH consists of a C4F10 gas radiator surrounding the target, a spherical VUV-mirror and six multiwire proportional chambers with cathode pad readout and CsI photon converter for single VUV-photon detection. In july ’97 the performance of a prototype setup in the environment of a Ekin ≃ 1 A · GeV U-beam (106 part./spill) hitting a 6 g/cm2 Pb-target was studied. First results of an analysis of the identification of e+e−-pairs produced by external conversion in the Pb-target using two types of ring finding algorithm are presented and compared to a GEANT simulation.
∗ supported by GSI and BMBF contract 06TM872 TP II