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    User name X. Zheng

    Log entry time 08:26:46 on September 4,2001

    Entry number 73316

    Followups:

    keyword=Target - EPR at gradient coil current L=1.6A T=5.0A

    7:45am, set longitudinal gradient coil current 1.60A

    EPR conditions: Vmod 0.7 Vpp, 3 lasers, gradient coil current L=1.60A T=5.00A

    7:45am, EPR, freq 1/2 = 48.1/44.3 KHz, P1/2 = 47.1/43.4
    7:55am, EPR, freq 1/2 = 44.2/44.3 KHz, P1/2 = 44.7/43.2
    comments: 0.7Vpp is not reliable for flips.

    conclusion: Looks like there is masing here,
    7:58am, set longitudinal gradient coil current back to 1.60A.

    Details on EPR data:

    -*-*-*- 7:45am -*-*-*-
    1st order:
    freq. shift = -48.07 KHz +/- 1.82 KHz, P = -47.09%+/- 1.78%
    freq. shift = 44.32 KHz +/- 1.84 KHz, P = 43.41%+/- 1.80%
    0th order:
    down: freq. shift = -46.94 KHz +/- 1.80 KHz, P = -45.98%+/- 1.76%
    up: freq. shift = 45.19 KHz +/- 2.04 KHz, P = 44.27%+/- 2.00%

    -*-*-*- 7:55am -*-*-*-
    1st order:
    freq. shift = -45.59 KHz +/- 2.40 KHz, P = -44.66%+/- 2.35%
    up: freq. shift = 44.13 KHz +/- 2.11 KHz, P = 43.23%+/- 2.07%
    0th order:
    down: freq. shift = -44.72 KHz +/- 2.42 KHz, P = -43.81%+/- 2.37%
    up: freq. shift = 43.80 KHz +/- 1.98 KHz, P = 42.91%+/- 1.94%