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    User name X. Zheng

    Log entry time 17:52:28 on September 6,2001

    Entry number 73643

    keyword=Target - EPR 39.4% with one laser

    17:19, turn on laser #6 after NMR,
    17:24, EPR performed, (program started at 17:21), P = 39.4%
    conditions: cell positon = pickup coil,
    photodiode signal DC=-123mV, D2 signal ~ 15 uV,
    Vmod = 1.0 V at the beginning, then changed to 1.2Vpp in the middle because the first flip was very slow. Second (up) flip looks better with 1.2 Vpp
    sweep/waiting time = 6/30 sec.

    Suggested new EPR conditions during transverse data taking:
    Use laser #6, Vmod 1.2 Vpp, sweep/wait time = 6/30 or 8/30, (I did not see big difference between two sweep time settings); Use 1st order fit and calibration constant for "one laser and cooling jet on".

    details on EPR data:
    1st order fit.
    down: freq. shift = -38.97 KHz +/- 1.25 KHz, P = -39.56%+/- 1.26%
    up: freq. shift = 38.65 KHz +/- 1.23 KHz, P = 39.22%+/- 1.24%