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    User name V. Sulkosky/ Zhihong Ye

    Log entry time 15:21:04 on September 8,2010

    Entry number 332114

    keyword=Right HRS S0B Channel Light leak

    I turned on the HVs for S2m and S0 for the Right HRS. Zhihong turned
    the lights out in the detector hut to check for light leaks and it
    appears that the S0B PMT has a light leak. The scaler rate changes from 1800 Hz to about 600 Hz with the lights on and off respectively.

    The S0A channel is not affected with the lights on and off in the
    detector hut. S2m also does not appear to have any lights leaks from
    this test.

    FIGURE 1