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    User name jpchen

    Log entry time 16:14:10 on April 2,2012

    Entry number 369353

    keyword=day shift summary

    Day shift summary:

    Shift workers: J. P. Chen (SL), Y. Zhao (TO), A. Gladmazd (3rd)

    8:00 Continue data taking at P0=1.159 GeV.
    runs 3622/3623/3624/3625/22647/22648/22649/22650.

    9:25 Dilution runs (12C, Dummy, Empty) with raster on.
    9:45 IHWP changed to IN.
    10:25 changing to P0=1.078 GeV.
    10:33 bleed-throu measurement, zero.
    started prodocution with with bottom cell,
    pol=42% to start with.
    left arm first at 10:38, run 3628/3629
    right at 10:49. Dipole drifted out once during run 22653.
    production runs 22653/22654.
    Total events 20.2 M. with polarization 42-34%.
    11:17-12:09 Beam off due to injector work.
    12:09 Beam back, slow raster check to 2.0 cm with dummy target, 3rd arm rate is still too high. Going back to 1.8 cm. Will check tomorrow after ebam study.
    12:20 dilution runs on dummy, empty and 12C. With raster on.
    13:00 moved back to bottom cell for production, target polarized back to 34%. runs 3634/22658.
    13:19 VESDA/fire alarm.
    Askde beam off, informed tech/MCC.
    Heidi ramped all HRS and Septum magnets down.
    It was found that ot was due to the dry air compressor for dump failure.
    Eventually went to restricted access to get VESDA level down.
    Still restricted access at the end of shift.
    5 iocs went off. Heidi/Jack checking them. Some came back.
    Target gorup also ramped down the target magent.
    The person from the company determinded that the compressor need to replace parts. Will fix it tomorrow. We can run with it off.
    Still recovering from the event at the end of the shift.