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    User name Wolfgang, Xf. Zhu

    Log entry time 21:08:16 on July 1,2001

    Entry number 65334

    keyword=Target - EPR - 39 % (large error)

    20:20 EPR measurement

    Conditions: cell position: pol. 3He, laser #6 on, B field: 0 deg., trans. grad. coil:
    + 5.00A, long. grad. coil: -2.00 A, beam: on (data taking off)

    P ~ 39 %

    0th order fit:
    freq. shift:
    down: -47.36 kHz +/- 8.8 kHz
    up: 46.5 kHz +/- 11.0 kHz

    pol's:
    down: 39.3 % +/- 7.3 %
    up: 38.6 % +/- 9.0 %

    1st order:
    freq. shift:
    down: 46.7 kHz +/- 8.6 kHz
    up: 46.9 kHz +/- 10.0 kHz

    pol's:
    down: 38.8 % +/- 7.1 %
    up: 39.0 % +/- 8.7 %

    Comment: It is clear from the error bars that the signal is extremely noisy.
    Nevertheless we believe that the central value is not too bad, since we waited
    a little longer (20 s or so) before and after the sweep to have enough points
    to fit. I had to turn the integration off during the down flip and turned
    it on again before the up flip. The down flip is not good, but there is enough
    data to fit the bottom spin state.

    My suspision is that the diode dies slowly due to radiation damage.

    Note: Although I clicked on "print" in the temperature panel, the window was
    either never printed or somebody else picked it up. I did wait long enough to
    let the temperatures stabalize (RTD6 ~ 172.4 deg C, RTD7 ~ 166 deg C).