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    User name sarty

    Log entry time 07:29:51 on May21,2002

    Entry number 3851

    keyword=Owl shift summary

    Quick Executive Summary:
    - completed Kin "M"
    - moved to Kin "N", did carbon pointing, and did a couple of production runs
    - had a problem with ROC14 crash on Run 1725 (of Kin "N" production running)
    - stopped at 7am to prepare for survey crew
    .
    *************************
    Gory details of shift activities:
    .
    00:00 ... Take over production running on KIN M.
    70 microamp beam, raster on, 4 cm LH2 target in - all running well.
    00:04 ... Start run 1715
    00:36 ... Stop run 1715 (1 M total events)
    00:37 ... Start run 1716
    01:10 ... Stop run 1716 (1 M total events)
    01:10 ... Start run 1717
    01:42 ... Stop run 1717 (1 M total events)
    Complete production running (~320k good "physics analysis" events in HRSL)
    .
    Switch to 4cm Dummy cell.
    01:55 ... Start run 1718 with Dummy cell using same prescale factors as prod. runs
    02:10 .. . Stop run 1718 early (300k events) to improve prescaling - weren't taking enough T1, T2
    02:11 ... Start run 1719 with Dummy cell and improved prescale factors.
    02:40 ... Stop run 1719 (1 M total events)
    02:41 ... Start run 1720 with Dummy cell.
    03:10 ... Stop run 1720 (1 M total events)
    03:11 ... Start run 1721 with Dummy cel.
    03:40 ... Stop run 1721 (1 M total events)
    .
    Switch to Carbon for last pointing run. Raster off, prescales reset (same as Run 1705)
    03:47 ... Start run 1722 - carbon pointing run.
    04:00 ... Stop run 1722 (300 k total events)
    .
    SWITCH TO KIN "N"
    Set Left Momentum to 2.979 GeV/c, Left Angle to 28.380 degrees.
    Carbon pointing run to start (raster off, adjust prescales)
    04:40 ... Start run 1723 - carbon pointing run.
    05:05 ... Stop run 1723 (~400k events)
    .
    Put in 4cm LH2 target to begin production running, Kin "N". (raster on, adjust prescales)
    05:21 ... Start run 1724 - production LH2.
    05:55 ... Stop run 1724 (1 M total events)
    05:56 ... Start run 1725
    06:15 ... Sopped run 1725 because of ROC14 crash (~560k events)
    .
    Oops...looks like T1 prescale wasn't high enough, and deadtime for Run 1725 was
    pretty high (I calculated ~70% for T3 deadtime...) - this is probably the reason
    we killed ROC14. Wil increase T1 prescale by factor of 4, which should then
    give ratio of good elastic right/left of ~4 as asked for (this ratio was 15.6 for analyzed
    Run 1725).
    .
    06:42 ... Start run 1727 (run 1726 doesn't exist due to process of CODA recovery)
    07:00 ... Stop run 1727 (296k events) to go to Controlled Access (for survey crew
    coming at 07:30).