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    User name Moffit

    Log entry time 23:59:19 on August 27, 2005

    Entry number 153585

    keyword=Swing Shift Summary

    Swing Shift for Saturday August 27th, 2005

    Leader:   Bryan Moffit
    Worker:   Kebin Wang

    Left HRS p0   = -2.737 GeV/c   Septum Set Current = 283.57A
    Right HRS p0  = -2.733 GeV/c   Septum Set Current = 278.22A
    Sweeper is ON at 111.00A

    Summary

    Nice production on this shift (collected 294.1k pairs... about .78 C, not counting run 4784). Attempted a linearity scan... not sure how successful/useful it will be (run 4780).

    Significant Events

    • 16:00 Began shift in the middle of run 4773.
    • 17:33 Beamline HV crate trip. Compton photon rates went to zero. Turned off and on the crate, and the rates returned.
    • 19:56 Asked MCC to insert the IHWP.
    • 20:35 Began linearity/current scan.
    • 21:00 Back to production.
    • 21:05 Noticed that the bpm12 wires were saturated signals. Asked MCC about it... they changed the default auto gain value from 500 to 400. Not sure if that was the right thing to do... but the gains adjusted after a beam trip and the signals went back to normal.
    • 22:20 Lost comm with iocha14. Recovered by the end of run 4783.

      • Data Run Summary

      • 16:00 Run 4773 - Production Run (20cm Helium-4), IHWP OUT, 41.4k pairs.
      • 16:05 Run 4774 - Production Run (20cm Helium-4), IHWP OUT, 41.8k pairs. End of run failed... data is okay
      • 17:06 Run 4775 - Production Run (20cm Helium-4), IHWP OUT, 44.8k pairs.
      • 18:02 Run 4776 - Production Run (20cm Helium-4), IHWP OUT, 46.8k pairs.
      • 18:58 Run 4777 - Production Run (20cm Helium-4), IHWP OUT, 46.2k pairs.
      • 19:55 Run 4778 - Production Run (20cm Helium-4), IHWP OUT. Very little data... could be considered junk.
      • 19:58 Run 4779 - Production Run (20cm Helium-4), IHWP IN, 29.5k pairs.
      • 20:35 Run 4780 - Linearity/Current Scan (20cm Helium-4), IHWP IN.
      • 21:00 Run 4781 - Production Run (20cm Helium-4), IHWP IN, Short run, charge feedback was off.
      • 21:06 Run 4782 - Production Run (20cm Helium-4), IHWP IN, 37.4k pairs. bpm12 wires saturated at beginning.
      • 22:02 Run 4783 - Production Run (20cm Helium-4), IHWP IN, 47.6k pairs. Left arm magnets tripped around 30k. Right arm okay.
      • 22:58 Run 4784 - Production Run (20cm Helium-4), IHWP IN. Prompt analysis passed to owl shift.
      • 23:54 Run 4785 - Production Run (20cm Helium-4), IHWP IN. Passed to owl shift.

      Objects above are not to scale.