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    User name Owl shift

    Log entry time 08:10:56 on April 27, 2009

    Entry number 269024

    keyword=Owl Shift summary

    SL: B. Zhao
    TO: P. Bradshaw
    3rd: W. Luo

    0:00 take over the shift, call MCC to move out the 1/2 plate and take 1
    hour data on 3He target (longitudinal -):
    L-arm runs: 1527, 1528
    R-arm runs: 20414, 20415

    01:20 Jin is here and will start repolarizing 3He target. Miha also
    starts to do some tests on BigBite.
    run 1529 and 20416 are test runs, while 3He target is being repolarized
    to vertical direction.

    03:10 Miha finished his test. Start calibration runs on 3He reference
    cell, 20 minutes run:
    L-arm runs: 1539 (gauge reading pressure: -5; true value: 0)
    1540 (gauge reading pressure: 10; true value: 15)
    1541 (gauge reading pressure: 40; true value: 45)
    1542 (gauge reading pressure: 70; true value: 75)

    R-arm runs: 20420 (gauge reading pressure: -5; true value: 0)
    20421 (gauge reading pressure: 10; true value: 15)
    20422 (gauge reading pressure: 40; true value: 45)
    20423 (gauge reading pressure: 70; true value: 75)

    04:50 MCC calls. Beam may be down about half an hour.

    05:20 Beam is still down. Call MCC to request an escort controlled access
    to synchronize L and R arms by cable adjustment.

    06:00 finish the work in the Hall, go to beam permit.

    06:30 MCC is ready to deliver beam. Follow the procedure on the white
    board to get beam back.

    07:10 continue to take data on 3He reference cell. From here, L-arm and
    R-arm are synchronized:
    L-arm runs: 1547 (gauge reading pressure: 70; true value: 75)
    1548 (gauge reading pressure: 100; true value: 105)
    1549 (gauge reading pressure: 130; true value: 135)

    R-arm runs: 20431 (gauge reading pressure: 70; true value: 75)
    20432 (gauge reading pressure: 100; true value: 105)
    20433 (gauge reading pressure: 130; true value: 135)
    08:10 End synchronizing L and R arms. From here, run them seperately.