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HK: Fachverband Hadronen und Kerne

HK 67: Poster Session

HK 67.94: Poster

Donnerstag, 19. März 2009, 14:00–16:00, Audi-Max

The Upgrade of the Multiwire Drift Chamber Readout of the HADES Experiment at GSI: the Optical End Point Board. — •Attilio Tarantola^1,2, Ingo Froehlich¹, Burkhard Kolb², Jan Michel^1,2, Christian Muentz^1,2, Marek Palka^4,2, Herbert Stroebele¹, Joachim Stroth^1,2, Michael Traxler², and Joern Wuestenfeld³ — ¹Institut für Kernphysik, Goethe-Universität, Frankfurt, Germany — ²GSI Helmholtzzentrum für Schwerionenforschung, Darmstadt, Germany — ³Institut für Strahlenphysik, Forschungszentrum, Dresden-Rossendorf, Germany — ⁴Smoluchowski Institut of Physics, Jagiellonian University, Krakow, Poland

One of the goal of the HADES upgrade project is the realization of a new data acquisition scheme for the 24 Multiwire Drift Chambers (MDCs), which allows to increase the readout speed of the 40.000 TDC channels. On the existing MDC Front End Electronic (FEE) side an Optical End Point Board (OEPB) has been designed to control configuration and readout of the chamber’s TDCs. The OEPB uses Plastic Optical Fibres (POF) for data transmission, which results in total electromagnetic immunity, amazing simplicity in handling and low power consumption. The employment of a Lattice ECP2/M FPGA with SERDES manages serial data transmission and its large resources allow for the storage of several events close-to-front-end. As 400 OEPBs will be located in the detector acceptance, dedicated FPGA hardware is used to detect Single Event Upsets (SEUs).