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    User name R. Michaels

    Log entry time 12:37:41 on August 1,2001

    Entry number 68518

    keyword=Asymmetry Generator Results (II)

    Results from Asymmetry Generator tests in toggle mode with A1n configuration
    for helicity. See also paper logbook p. 160.
    This is for ~2.5 hour run last night with 36M triggers (2425/21430/1571).
    Errors in trigger asymmetry are probably very small (remember, it is not a random
    process). Errors in scalers and parity DAQ are judged from observed fluctuations,
    but I believe the parity DAQ may have a ~40 ppm error due to imperfectly known
    pedestal (perhaps it can be improved, e.g. the signals were pretty low). Partial
    results below, the 5 systems agree to an approx. -820 ppm asymmetry to within
    about 20 ppm.
    -------- Asymmetries (ppm) [All negative, sign supressed]-------------
    Parity DAQ...............Left Spectrometer.....................Right Spectrometer
    ...................................Trigger.............Scaler..............Trigger..............Scaler
    .................................(only 5 M)........(nearly all)........(only 5 M).........(all data)
    844 (1) ....(40).............818................804 +/- 15..........813...............804 +/- 14
    ......(stat) (ped error)