Bochum 1998 – scientific programme

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HK: Hadronen und Kerne

HK 47: Instrumentation V, Detector Systems

HK 47.1: Group Report

Wednesday, March 18, 1998, 14:00–14:30, A

Status of the High Acceptance Di-Electron Spectrometer HADES — •Wolfgang Koenig — GSI, Darmstadt

The high acceptance di-electron spectrometer HADES currently under construction at GSI has been designed to investigate the properties of hadrons in particular during the transient hot and dense nuclear matter phase produced in relativistic heavy ion collisions by investigating the electron pair and Dalitz decay channels. It allows to reconstruct the invariant mass of e.g. vector mesons with an accuracy of 1% and will provide high statistics data for various collision systems of interest. It is planned to perform systematic investigations as a function of tranverse momentum and rapidity of the decaying particles for a broad range of system sizes (π on Pb up to U on U) and incident beam energies (0.4 AGeV up to 2 AGeV). HADES will be installed at GSI during summer/fall 1998 and first comissioning runs will take place end of 1998. Individual as well as combined tests of full size prototypes of all detector systems (ring imaging cerenkov detector, drift chambers, time-of-flight wall, shower detectors) have been performed sucessfully under realistic conditions. The status of the setup will be presented and the anticipated performance will be discussed in the context of currently existing di-electron data and model predictions.