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    User name R. Michaels

    Log entry time 12:30:41 on June26,2004

    Entry number 126961

    keyword=Septum magnet history (affects Q2)

    History of the septum magnet since start of this experiment.

    halog ...... date/time ........ settings ..... comments
    ............................... L .. R
    126754 ..... 6/25 .. 02:00 ... 275.3 .. 274.4 READBACK for alignment
    126826 ..... 6/25 .. 13:19 ... recommend tiny change to 275.0, 274.0
    126838 ..... 6/25 .. 15:50 ... Momentum changed but the septum values
    used were SETPOINT (disagrees with READBACK by 1 - 2 Amps).
    now ........ 6/26 .. 12:20 .... 275.0 .. 274.0 READBACK goal.
    Peter Laviolette is recovering septum now.
    He will halog the setpoints and readbacks.
    Note, granularity in readback is +/- 0.5 Amps (implying the original
    settin in halog 126754 was as good as you can do).
    If we're concerned we can, later & briefly, make two Q2
    measurements with the two septum currents. Might be good anyway
    to verify our sensitivity.
    More history:
    Spectr. DAQ Run 1178
    Set L = 275.8, Read L = 275.75, Set R = 276.0, Read R = 274.75

    HAPPEX Run 2412 (representative of last night)
    Set L = 275.0, Read L = 274.75, Set R = 274.0, Read R = 272.75

    Peter tells me he is making this setting just now:
    Set L = 275.5, Read L = 274.75 - 275.25 (fluctuates)
    Set R = 275.35, Read R = 273.75 - 275.25 (fluctuates)