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    User name Armstrong

    Log entry time 14:33:32 on June29,2001

    Entry number 64987

    keyword=feedback off


    Looking at the last dozen runs or so, the rotatable half-wave plate seems
    not to have changed (from the value of 597), despite feedback being
    enabled at our end (end despite the fact that the asymmetry has not been
    zero). I suspect that MCC has turned off the feedback at their end. When
    beam comes back we should ask them to make sure that the "asymmetry
    lock" is enabled.