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    User name jpchen

    Log entry time 08:03:45 on November 9,2007

    Entry number 213160

    keyword=owl shift summary

    Owl shift summary.
    Shift workers: J. P. Chen (SL), Y. Zhang (TO), R. de Leo (3rd).

    0:00 Finished raster set-up: MCC 5x3 gives us 2x2.5 mm.
    Started beam x scan with empty target:
    0, 1, 2, 3, then -1. -2, -3, -4, -5.
    Found x is offset by 1 mm. Will ask for beam to be (-1,0) in both BPMA and BPMB.
    1:00 Spot_L shows a problem: no BPMA, BPMB strange shape.

    1:10 Moved Pb target in.
    Beam x scan -1, -2, -3, 0, 1, 2
    Did -1,-2,-3 before controlled access.
    2:23 requested controlled access to let Alexandre to
    look into the left BMP (SOPT_L) problem.
    changed left momentum to 215.105 MeV to have higher rate for
    NaI calibration.
    3:50 ended controlled access.
    3:55 beam back. resume x scan on Pb (0,0)
    4:15 (1,0)
    4:25 (2,0)
    4:30 requested beam to be (-1,0), and then increase to 50 uA for
    production.
    4:38 started production with 50 uA.
    4:40 right dipole quenched.
    4:50 Alexandre changed NaI HV.
    4:50 reduced beam current to 40 uA, changed PS4 to 10.
    4:55 beam off, vacuum valve problem.
    5:45 changed left P back to the first setting, 813.763 MeV.
    moved target to He4.
    6:47 beam back.
    7:30 beam off, ioc reboot.
    7:56 beam back

    Left spectrometer, 120 degree.
    p=215.105 MeV
    2115, 4:38-4:42, 271K, 50uA on Pb, PS3=PS4=1, deadtime 20%.
    2116, 4:53-5:03, 97K, 40uA on Pb, PS4=10, deadtime 13%.
    p=813.763 MeV.
    2117, 6:47-7:02, 222K, 50 uA on He4.
    2118, 7:15-7:22, 225K, 50 uA on Pb
    2119, 7:56-8:02, 112K, 50 uA on 10 cm dummy.


    Right spectrometer, 120 degree.
    p=534.589 MeV
    20622, 4:38-4:42, 132K. 50 uA on Pb, right dipole quenched during the run.
    20623, 7:15-7:21, 247K, 50 uA on Pb, dipole is 0.2% off at the begining, settled to 0.1% during the run.
    20624, 7:56-8:02, 117K, 50 uA on 10 cm dummy.