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    User name hyde

    Log entry time 09:44:06 on October 8,2004

    Entry number 133408

    keyword=Proton Array HV

    On towers 1,2 and 19 (readout on GUI tower 10)
    the readback DC Voltage is less than 0.175 V,
    except for channels 1-3, 1-4, 10-1.

    I suggest raising the HV to increase the gain by a factor of two
    on channels 1-1, 1-2, 1-5, 19-2 --19-5.
    This is HV Proton Array 2 channel 0,1,4 and
    HV array 9 channel 7,8,9,10
    These channels are presently operating at a gain of 800, whereas
    the rest of the array is set to 3000.
    The PMT gain scales as the 8.5 power of the HV.