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    User name kramerk

    Log entry time 04:54:07 on July16,2001

    Entry number 66326

    keyword=Target - NMR/EPR/NMR Polarizations

    NMR @ 04:25am - LabView Fit 46.2%

    4:27am, EPR (between two NMRs), 44.0%
    3 lasers on, target postion = pick-up coil;
    all gradient coils off; latest run number 2053/21053;

    1st order fit:
    down: freq. shift = -48.21 KHz +/- 1.42 KHz, P = -44.03%+/- 1.30%
    up: freq. shift = 48.24 KHz +/- 1.80 KHz, P = 44.05%+/- 1.64%


    0th order fit:
    down: freq. shift = -48.01 KHz +/- 1.19 KHz, P = -43.84%+/- 1.09%
    up: freq. shift = 48.29 KHz +/- 1.79 KHz, P = 44.10%+/- 1.64%

    Take the average of four as target polarization;

    Comments: during AFP measurement, stayed at the original state for
    about 1 minute. Lock-in fluctuation does not depend on modulation source much
    at > 0.7Vpp, (tried 0.7Vpp and 0.8Vpp). But also observed that sometimes it is
    very stable (fit sigma < 0.6 KHz) sometimes it jumps around with sigma 1.5
    KHz). Looks like there is external noise but it is not a big deal.

    NMR @ 4:33 am - 46.4%