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    User name hyde

    Log entry time 10:02:16 on November 1,2010

    Entry number 337957

    keyword=Cerenkov run 8161

    Study Cerenkov effective threshold in LeftHRS run 8161
    ps3=ps4=1

    Select good tracks in each cerenkov
    e.g. cer[0]
    first all T3 events, then events with good timing cut in cer TDC T->Draw("L.cer.a[0]",cCleanTrk*"abs(L.cer.t[0]-1700)<500&&fEvtHdr.fEvtType==3","same")

    T.cer.a[0] Effective threshold is 1 photo-electron

    T.cer.a[1] threshold is 1 photo-electron?

    T.cer.a[2] threshold 1 photo-electron

    T.cer.a[3] threshold = 1 p.e.

    T.cer.a[4] threshold >/= 1 p.e.

    T.cer.a[5] threshold 1.5 p.e.

    T.cer.a[6] threshold 1 p.e.

    T.cer.a[7] threshold 1.5 p.e.

    T.cer.a[8] threshold 1.5 p.e.

    T.cer.a[9] threshold 1.5 p.e.





    FIGURE 1

    FIGURE 2