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    User name R. Michaels

    Log entry time 06:28:41 on June14,2001

    Entry number 63045

    Followups:

    keyword=relative sign calibration

    During Moeller measurements we had a charge asymmetry and
    used that to cross calibrate the Moeller apparatus helicity sign versus
    the spectrometers. Gene saw +3 +/- 1e-3 asymmetry (he can give more
    accuracy later), while I get from scalers:
    R-arm +2950 +/- 120 ppm (agrees w/Moeller, also in sign)
    L-arm +3000 +/- 134 ppm (" " ")
    Strangely, Parity DAQ gives no result because the signal is indistinguishable
    from the previously recorded pedestal. For this current 0.6 uA I expected a
    signal 2% higher than pedestal, but maybe something is nonlinear. Should
    check later at higher current.
    Also would be interesting to see what is the sign of Trigger asymmetry
    in event DAQ of spectrometer, but there is no target now, must check later.