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    User name johna

    Log entry time 08:02:33 on May 2,2002

    Entry number 2365

    keyword=Shift Summary

    No fast feedback, so we are delaying the harp scans and optics studies.

    Runs
    1109: Long carbon inelastic run (detector checkout)
    1110-1113: check rates vs. trigger conditions, event size with FPP on/off.
    1114-1119: large collimator, inelastic, various targets
    1120-1127: rate-dependence tests (thick carbon, open collimators, vary prescales.)
    1128-1129: short runs, one arm only, to check event size for each arm.
    1130-1132: BCM calibration runs (1130 did not have zero current points, 1131
    ended early due to loss of beam.) Only up to 55 microAmps.
    1133: Run to test VDC efficiencies. dhist shows very low raw efficiency, but at
    least 70% of events have tracks.
    1134-1139: Sieve slit runs.

    07:30: Changing spectrometers to 1.958 GeV/c (elastic + 2%).

    Issues:
    -Event size is >2kB/event. Is this normal?
    -Need fast feedback for most of the remaining checkout.
    -Need to do the Harp scans that were delayed.
    -dhist VDC efficiencies are very low (lower than data indicates - might be
    a dhist problem).