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    User name T. Chang

    Log entry time 08:00:13 on December 4,2000

    Entry number 52860

    keyword=shift summary

    00:14 Run 1608 finished. 1M trigger taken. Everything seems quiet and smooth so far...
    00:15 Run 1609 started. 1M trigger taken. Run ends 01:03.
    01:04 Run 1610 started. Hall_C is down for a while. we called MCC to increase the current to 75 uA. 1M trigger taken. Run ended 01:49.
    During last run the FSD triped often. We wonder if this is related to the high current we requested. Call MCC to reduce the current to 70 uA.
    01:50 Run 1611 started. FPP trips. Ended run at 2:00. 0.16M trigger taken.
    02:11 Run 1612 started. FPP trips again. run ended at 2:35. 0.73M triggers taken.
    We request the beam current to be 65 uA. Hope this can bring us more steady beam and less FPP trips.
    02:43 Run 1613 started. 02:50 Hall-C is back on. Beam back to 50 uA. Run ended at 03:05, deceived by a false alarm from FPP. 0.42M triggers taken.
    03:07 Run 1614 started. 1M triggers taken. Run ends at 04:03.
    04:04 Run 1615 started. 04:42 FPP 8.1.22 trips again. end run. 0.71M triggers taken.
    04:46 Run 1616 started. 1M triggers taken. Run ends at 05:38.
    05:39 Run 1617 started. 06:26 FPP 8.1.22 trips again. end run. 0.75M triggers taken.
    06:30 Run 1618 started. end run at 06:40 due to QE measurement. 0.21M triggers taken.
    Accelerator will be down about 15 min for QE measurement.
    06:52 Run 1619 started. 1M triggers taken. run ends at 07:52.
    07:53 Run 1620 started. will end on next shift.


    Shift summary:
    * changed loop_check_fpp.tcl rate/current alarm setting from 100 to 90.
    * FPP channel 8.1.22 trips several times.
    * Argon pressure keep dropping due to leakage in the gas line.
    * Total triggers taken in this shift: 9.02M triggers.