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    User name X. Zheng, W. Korsch

    Log entry time 01:32:46 on August 4,2001

    Entry number 68936

    keyword=Target - EPR - 44.9%

    23:15 ~ 23:40, several EPRs at BeO/12C target postion, beam off.

    23:15, EPR with 3 lasers, P = 44.9%

    23:25, EPR with 1 laser, D2 signal small (~19uV),
    first sweep not good,
    adjusted gains, tried two more sweeps, cannot achieve stable/nice spectrum;
    23:35, Back to original settings, EPR with 3 lasers again, P= 44.0%

    0th order fit:
    freq1: -47.13 kHz +/- 1.55 kHz | Polarisation: 44.08 % +/- 1.45 %
    freq2: 47 kHz +/- 1.45 kHz | Polarisation: 43.96 % +/- 1.36 %


    Also fit two measurements @ 17:30 this afternoon, first one P= 41.0%,
    second one P= 41.4%

    Current operation conditions for Shapiro:
    - photodiode signal >90mV, D2 ~ +/- 23uV;
    - 3 longitudinal lasers;
    - RF 16.0 V; Set wavetek 80 frequency at D2 signal (-) 18~22uV;
    - Mod source amplitude 0.8 Vpp;

    EPR data: All fit are 0th order

    17:07
    freq1: -44.02 kHz +/- 1.04 kHz | Polarisation: 41.17 % +/- 0.976 %
    freq2: 43.71 kHz +/- 1.01 kHz | Polarisation: 40.88 % +/- 0.942 %

    17:11
    freq1: -44.5 kHz +/- 1.48 kHz | Polarisation: 41.62 % +/- 1.38 %
    freq2: 43.97 kHz +/- 1.34 kHz | Polarisation: 41.12 % +/- 1.25 %

    23:15
    freq1: -47.87 kHz +/- 1.46 kHz | Polarisation: 44.76 % +/- 1.37 %
    freq2: 48.22 kHz +/- 1.52 kHz | Polarisation: 45.09 % +/- 1.42 %

    23:35
    freq1: -47.13 kHz +/- 1.55 kHz | Polarisation: 44.08 % +/- 1.45 %
    freq2: 47 kHz +/- 1.45 kHz | Polarisation: 43.96 % +/- 1.36 %