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    User name Zolnierczuk

    Log entry time 21:29:43 on July14,2001

    Entry number 66173

    Followups:

    keyword=charge asymmetry

    Just checked two charge asymmetry measurements and here's what I got:
    POS QASY
    322 164
    373 -216
    where pos is a position of rotable (in steps) and QASY is the charge
    asymetry in ppm. An 'eye+ruler' simple fit yields
    QASY = -7.5 *POS + 2500

    I understood that Antonin and Joe are using opposite signs for the slope,
    so this would mean that we should use +7.5 ppm/step instead of current
    4.2 ppm/step.
    It would also explain why our QASY jumps from -100 ppm to 100ppm
    (or vice versa) at each run end.

    Just send an e-mail to Antonin.