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    User name Wolfgang, B. Zhang, X. Zhu

    Log entry time 12:18:26 on June22,2001

    Entry number 64134

    keyword=Target: EPR, NMR, field rotation to 180 deg

    10:50 am beam will be off for at least one hour, decided to go to 180 deg field
    configuration.

    10:55 am: EPR
    Conditions: cell in pick-up coil, laser #6 on, trans. grad coil: 6.00 A,
    long. grad. coil: 2.00 A, beam off

    P = 38.5 %

    0th order fit:

    freq. shift, flip down: -46.4 kHz +/- 1.8 kHz
    flip up: 46.3 kHz +/- 2.2 kHz

    Polarizations:

    flip down: P = 38.5 % +/- 1.5 %
    flip up: P = 38.5 % +/- 1.9 %

    Comments: electroncis were adjusted well, flips clean

    10:57 am: laser #6 off
    11:04 am: NMR measurement
    Conditions: beam off, all lasers off, trans grad coil: 6.00 A, long. grad.
    coil: -2.00 A

    x = 4.8 mV/ y = -3.2 mV -> V = 5.80 mV (switch left in "EPR" position !!)

    11:15 am: field rotation to 180 deg completed, L/2 plate in

    11:17 am: NMR measurement

    x= -4.3 mV/ y = 4.2 mV -> V = 6.01 mV (switch left in "EPR" position !!)

    11:19 am: laser #6 on

    ~11:23 am: EPR measurement
    Conditions as above: field at 180 deg

    P ~ 35 %

    freq shift: first flip: -42.5 kHz +/- 1.1 kHz
    second flip: 41.8 kHz +/- 1.2 kHz

    Polarizations:

    flip down: P = 35.2 % +/- 0.9 %
    flip up : P = 34.7 % +/- 1.0 %