• Main INDEX
  • Monthly INDEX
  • PREV
  • NEXT

    User name Chang

    Log entry time 00:05:16 on February16,2002

    Entry number 82868

    keyword=Run Summary

    16:40 5 uA of beam on target to investigate target stability.
    17:00 At 40 uA, target seems to behave O.K. We are ready to put in BeO
    to check position on target.
    17:25 MCC called and said that they are still working on harp scan. They may
    have to reboot the IOC.
    17:30 MCC called to inform us that beam will be off for about a minute to reboot
    IOC for harp scan.
    17:40 Harp scan is now working after rebooting IOC
    17:50 Ready for first run after long down time; will begin with optics run.
    20:00 Finish optics runs (last optics run is 2536)
    20:23 Start acceptance scan runs (first run is 2537).
    22:11 Cryotarget is acting up again - temp fluctuating. Page J.P. Chen for
    advice.
    22:55 While waiting for momentum change we do a quick harp scan to see
    whether harp scan is working or not. It works.
    23:40 The scaler rates are fluctuating badly. We suspect this could be due
    to target problem (density fluctuation). We take a run with beam
    reduced from 40 uA to 10 uA.
    23:52 Since we suspect the fluctuation is due to target density fluctuation,
    we decided to run with 12C target with 40 uA of beam and raster
    on. Scaler rates seem to be stable with 12C!