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    User name Jin Huang

    Log entry time 07:50:49 on February 14, 2009

    Entry number 261109

    keyword=Target Spin Flip X- -> X+

    Target Spin has been flipped from X- to X+ in standard hall CS.

    Before flip, polarization is 60.6%; after it's 59.97%. (Polarization drop is due to normal 0.5% * 2 NMR AFP loss.)

    For details, 2 step is done during the process:

    1. Field direction rotated from X+ to X-, at the same time Spin direction followed from X- to X+

    2. Laser polarization changed from X- pumping to X+

    Note1: +X is defined as horizontally perpendicular to beam, on the LHRS side; -X is to the bigbite side.

    Note2: Long. 1/4 wave plates are rotated to norminal angle (6 degree) during the process

    A copy of this log entry has been emailed to: moffit, yqiang

    Before NMR

    After NMR