Bochum 2009 – scientific programme
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HK: Fachverband Hadronen und Kerne
HK 67: Poster Session
HK 67.94: Poster
Thursday, March 19, 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 Tarantola1,2, Ingo Froehlich1, Burkhard Kolb2, Jan Michel1,2, Christian Muentz1,2, Marek Palka4,2, Herbert Stroebele1, Joachim Stroth1,2, 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).