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    User name X. Zheng

    Log entry time 12:29:09 on June16,2001

    Entry number 63383

    keyword=Target - EPR with gradient coil test

    11:15am to 11:32am:

    Did 3 EPRs after NMR measurement (NMR was done after transverse data taking, laser off and gradient coil off), under supervision of expert Wolfgang. Fit data as follows:

    0th order fit:
    Gradient coil, polarization from flip up(%), flip down(%)
    7A, 39.33, 36.88
    3A, 37.40, 35.31
    0A, 36.77, 35.15

    1st order fit:

    Gradient coil, polarization from flip up(%), flip down(%)
    7A, 39.22, 36.45
    3A, 37.59, 35.61
    0A, 35.16, 36.00

    3% loss between flip up and down of the 1st measurement could be either an indication of masing (same as what we saw during masing test at EEL lab), which means masing is not completely gone at gradient coil 7A; or a larger AFP loss due to the gradient coil.