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    User name M Friend

    Log entry time 11:41:21 on June 5,2010

    Entry number 324695

    keyword=Compton rates stripchart

    Compton rates with the high discriminator threshold are 23kHz/uA laser off and 35.5kHz/uA laser on, HV=-1900, photon detector centered on the photon beamline. The low threshold rate is 276kHz. Since the PMT seems okay and I can see a clear difference between laser on and laser off, we will try to run like this.

    FIGURE 1