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    User name A. Puckett

    Log entry time 00:03:21 on October27,2005

    Entry number 158116

    keyword=Swing shift summary 10/26

    Swing Shift Summary:

    Took over from day shift.

    Beam has been down all day for injector studies, and a sweep of the Hall is being performed, expect beam back within 1-2 hours. Also, right dipole is still ramping up. If not ready, will start running with one arm when beam comes back.

    at 16:25, we changed the insertable-half-wave-plate status to IN and ran flipper.

    Beam is back at ~18:45, resume production running. Pretty bad beam for next few hours. As of 21:21, we are averaging only about 20K good pairs per production run since we resumed production running, because of frequent beam trips, unstable BPM readings. Appears to be gradually improving.

    Beam has been very good since about 21:30, it is now 23:27. Ready to pass off to owl shift.

    Run Summary:
    Run # Start Stop IHWP #OK Pairs Comments
    5911 15:43 16:22 OUT Pedestal Run
    5912 16:34 17:30 IN Ped. Run
    5913 17:33 18:29 IN Ped. Run
    5914 18:29 18:42 IN Ped. Run
    5915 18:45 18:46 IN Junk run, forgot to move target into place, called MCC to remove beam.
    5916 18:52 19:47 IN 22609 resumed production running after moving target into place, initial beam BPM values no good, called MCC, waiting for stable beam with good BPM values. after a few minutes, BPM looks good, frequent beam trips. This beam is very trippy. Did a spot check, size looks good. At about 19:35, beam appears to have stabilized, good BPM readings, 58 microamps current. Compton DAQ having problems. Brad is working on Compton machine, trying to get it up and running.
    5917 19:48 20:44 IN 18400 Production
    5918 20:44 21:40 IN 28000 Production
    5919 21:41 22:36 IN 40000 Production
    5920 22:38 23:34 IN 37700 Production
    5921 23:34 IN Pass to Owl Shift

    Compton Run Summary:
    12520,12522,12523--relatively short, relatively bad runs, bad beam, Compton "flaky" tonight.

    "Good" runs:
    Run # Start Stop S/N PbPg Comments
    12524 20:51 21:03 36.4 -84.0
    12525 21:06 23:02 58.0 -86.0 For about the last 15 minutes of this run, the coincidence rate was still high even when cavity power was off. Hopefully didn't effect polarization measurement too much.
    12526 23:06 Started next run, behavior appears normal now. Hopefully stays that way. Pass to Owl shift