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    User name xfzhu

    Log entry time 23:25:11 on August 6,2001

    Entry number 69652

    Followups:

    keyword=root file for scalers

    Some scaler variables( T1,T2, charge, bcmu3...) were put into the root file, and saved as: /adaql1/home/adaq/e97103/espace/pinky/scaler/merge.root

    go to directory"/adaql1/home/adaq/e97103/espace/pinky/scaler/", and type "root", then, type ".x AsymEachRun.C".
    It will shows two windows, the red dots for left arm, and the blue dots for right arm.
    from top to bottom. The X axis gives out the run number.
    1. shows the asymmetry of Trigger_accepted/charge
    2. shows the asymmetry of T3/charge(T1/charge) for left arm(right arm)
    3.shows the asymmetry of T4/charge(T2/Charge) for left arm(right arm)
    4. shows the charge asymmetry
    ( you can use the mouse to enlarge the view)

    For polarized target runs, the asymmetry is clearly shown.

    the merge.root covers the scaler counts from run 2481 to run 2644. i will keep it updated with new runs daily. You can find scaler information for each run by looking into the merge.root.
    The variables in the root file:
    left arm variable starts with "l", and right arm starts with "r":
    lrun-- run number for left arm , rrun -- for the right arm.

    the second alphabet stands for the helicity gate, "p" for helicity plus, "m" for helicity minus, and "u" for ungated scalers.
    lpcharge---left arm charge with helicity plus gated.
    rucharge---right arm charge with helicity ungated.
    ...
    the rest variables are self-explained.