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    User name paschke

    Log entry time 14:04:15 on January10,2003

    Entry number 91316

    keyword=IA system waveplate changed


    The waveplate in the IA system has been changed by the source group, at our
    request. The 1/10 waveplate was removed and a 1/4 waveplate for 780 nm light
    was inserted. The mismatch in wavelength spec makes the effect of this change
    difficult to accurately predict, but it should be a significant boost to the maximum
    achievable IA slope. This will allow for a more robust IA feedback and more
    flexibility in RHWP setpoint.

    In order to assure reliable feedback, a new IA calibration curve must be taken when
    beam returns.