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    User name cisbani

    Log entry time 06:53:54 on November 16, 2008

    Entry number 249157

    keyword=On RICH deadtime during cosmics in Nov/15 swing shift

    In the swing shift, during cosmics runs, the dead time had increased to unexpected rates (80-90%).

    During the morning we removed the ROC software check on the presence of the T/H.

    It seems the ROC is interrupted by the L1A (instead of L1A & T/H).

    I restored the software check on T/H, the rates went to expected values. In the future it would be better to have the ROC triggered by L1A & T/H and remove the software check.

    A copy of this log entry has been emailed to: camsonne@jlab.org