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    User name bogdanw

    Log entry time 11:52:05 on July 8,2007

    Entry number 208043

    keyword=Q2=34 fm-2 HRS-L Q3

    keyword=Notes on setting Left Q3 for Q2=34fm-2

    Notes on setting Left Q3 for Q2=34fm-2

    Used Q2=30fm-2 values as reference:

    Momentum: P_30 = 0.5234 GeV/c
    Field: B_30 = -0.10364
    Current: I_30 = 709.12 A

    New momentum: P_34 = 0.4940 GeV/c

    Target Field for Q2_34: B_34 = (P_34/P_30) * B_30 = -0.09782

    New Current: I_34 = (P_34/P_30) * 709.12 = 669.29 A
    This value was entered into DAC and generated a field of -0.09770 T

    Corrected current: I_corr=(-0.09782/-0.09770) * 669.29 = 670.11 A

    Corrected current entered into DAC.

    The Corrected field = -0.097820, which differs from target field by only 0.00000 T, so no further correction was attempted.