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    User name Jin Huang

    Log entry time 00:38:24 on November 05, 2008

    Entry number 246752

    keyword=Couple Tests On Target

    Since we are to perform a spin up curve, a few test has been performed 
    before destroying the Pol. 
    

    Conclusions are

    1. New Rotation setup with 0.5 Step Size preserves >97%(rel.) of polarization (tested @ Empty target location). 2. An NMR, whoese RF field is parallel with holding field, will destroy half of polarization

    ----------------------- Test Time Line -----------------------

    Starting Point:

    Target Position : Empty RF Position : Long Holding Field : Trans Pumping Chamber Pick Up Coil : Vert

    22:35 NMR -> Pol. = 44% 22:39 Rotation Field -> Long. + with laser ON, Step = .5 degree 22:40 Rotation Field -> Trans + with laser ON, Step = .5 degree 22:49 NMR -> Pol. = 42% 22:53 Laser OFF 22:53 Rotation Field -> Long. + with laser OFF, Step = .5 degree 22:56 Rotation Field -> Trans + with laser OFF, Step = .5 degree 22:49 NMR -> Pol. = 43% 23:00 Rotation Field -> Long. + with laser OFF, Step = .5 degree 23:03 Test Long RF on Long Polarization NMR Loss 23:04 Rotation Field -> Trans + with laser OFF, Step = .5 degree 23:06 NMR -> Pol. = 20.7%



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