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    User name Yi Qiang

    Log entry time 14:08:06 on May 13, 2009

    Entry number 273041

    This entry is a followup to: 272660

    Followups:

    keyword=Late entry: current settings for rotatable Q-wave plates of longitudianl laser

    After yesterday's EPR calibration, we found out the projected max
    polarization is only about 45%. So the first thing I did was to tune the
    Q-wave plates one more time at production condition to see whether this
    helps. And the new settings are the following:
    Motor 1426 = plate #5 on S wave upstream facing upstream -> 106 Degree
    Motor 1423 = plate #6 on S wave downstream facing upstream -> 134 Degree




    Figure 1



    Figure 2