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HK: Physik der Hadronen und Kerne
HK 9: Postersitzung: Instrumentation und Anwendungen
HK 9.2: Poster
Tuesday, March 20, 2001, 10:30–12:45, R
Calibration Strategy and Performance of the HADES Drift Chamber Tracking System* — •Peter Zumbruch1, Hejdar Agakichiev1, Denis Bertini1, Jaroslav Bielcik1, Ilse Koenig1, Daniel J. Magestro1, Jochen Markert2, Christian Müntz2, Klaus Rosenkranz1, Joachim Stroth1,2, Vladimir Pechenov1, and Jörn Wüstenfeld2 — 1Gesellschaft für Schwerionenforschung, Darmstadt, Germany — 2Institut für Kernphysik, Johann Wolfgang Goethe-Universität Frankfurt, Germany
HADES is a second generation dilepton spectrometer presently being commissioned at GSI Darmstadt. The momentum measurement of charged particles emitted from the target is performed by a superconducting toroidial shaped magnet and a tracking system. This system consists of drift chamber modules (MDC) of high granularity arranged in six sectors with two modules before and after the magnet, respectively. Overall the system covers the full azimuthal angle and 18 - 85 degrees in the polar angle. The experiment will need an invariant mass resolution of 1% in the omega meson mass region. This requires a spatial resolution of better than 70 µ m per detector module.
In this contribution strategies for the calibration to provide this accuracy will be discussed. Corresponding results gained in several commissioning runs over the last year have been analyzed. The presently analyzed results show that the anticipated performance can be achieved.
*supported by:
GSI, BMBF, DFG, INTAS, EC