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    User name Sulkosky

    Log entry time 08:04:56 on August 5,2001

    Entry number 69368

    keyword=Owl shift Summary

    00:00 Continue taking data on Polarized 3He cell with beam half-wave plates IN at 10 uA. Collimators IN.
    01:25 Left Coda rate was half of previous runs with a high dead-time. Run # 2584. Run stopped to check things out.
    2:30 ROC15 stopped reporting for the right CODA, during run # 21586. Kill coda on both right and left spectrometers and rebooted the ROCs. Runs *587-*589 are junk.

    2:44 MCC called saying they lost a magnet and may need sometime to fix it.
    3:45 MCC called. They are still searching for the problem, but they will steer the beam for Hall A and B around the problem and send us CW beam. They will have to take beam away again once they have fixed the problem.
    3:50 More CODA problems this time the parity runcontrol failed to start. We killed CODA again. Finally problems seem fixed. Runs *590-*592 are junk and parity runs
    1724-1726 are junk.
    4:10 MCC called. They are cycling the problamatic magnet. Should have beam back in about 5 minutes.
    4:20 EPR/NMR measurements. NMR: 48.03 %; EPR 47.7 %.
    4:30 Checked beam position and Raster with BeO target. Position at (0,0). Raster good.
    5:15 Finish taking elastic data on Polarized 3He target at 0 degrees with beam 1/2 waveplate IN.
    5:20 Move beam half-waveplate OUT. Open collimators and change spectrometer momentum for both arms to 1.123 GeV.
    6:00 More DAQ problems. When we switched to prescale factors of 8, the deadtime for the left spectrometer was 40 %. After killing CODA, the rate was about 7. Runs *594 -*600 are junk.
    *************
    Three times we have lost our computer screens. Each time the screens freeze up for a few minutes on each computer. The GUI screens go blank. Eventually we lost contact with the information from the right spectrometer. After calling MCC to get the computer center specialist on call. He will come by and look at the network system. After talking to Bob Michaels, we will make an access to reboot the right arm spectrometer.

    8:00 ep measurement by Alexandre.