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    Detector Seminar

    Characteristics and Physics performances of TPC and RPC in the HARP experiment

    by Joerg Wotschack (CERN)

    → Europe/Zurich
    13/2-005 (CERN)

    13/2-005

    CERN

    90
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    Description
    The HARP experiment, which took data in 2001/02 at the CERN PS with a view to obtaining precise hadron production cross-sections, used a TPC and timing RPCs for measuring large-angle tracks. The characteristics and the physics performance of these detectors are presented. As for the TPC, the experience with the discovery and understanding of serious track distortions, and their a posteriori software correction with remarkable accuracy, is a tale in itself. The timing RPCs were the first large-scale system of their kind employed in a physics experiment. Thanks to their precise and consistent calibration, the particle identification capacity of the large-angle spectrometer was considerably enlarged. It is also shown that recent claims in the literature of a 500 ps advance in the timing of protons with respect to that of pions are false.
    Slides
    Organised by

    Ariella Cattai / EP