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    User name jpchen

    Log entry time 00:03:08 on November20,2009

    Entry number 301159

    keyword=swing shift summary

    11/19/2009 swing shift summary

    Shift workers: J. P. Chen (SL), J. LeRose (TO), J. Huang (3rd)

    16:00 shift startde with Compton test in progress. Beam current is 25 uA. Production data taking with Happex and both HRS'.
    Due to low beam current, some analysis plots showing zero due
    to cut on beam current. (BCM asymmetries, etc.)
    Ramesh found that BCM-u1 scaler on right HRS reads zero.

    16:55 Compton test run with 25 uA completed.
    Requested MCC for 100 uA.
    Started data taking.
    Slowly adjusted J-T valve to increase coolant flow to ahve HP heater over 200 watts with 100 uA to get ready for 115 uA running.
    17:05 Request 115 uA.
    MCC tried to reach 115 uA, but at 115 uA (113uA from average of two BCMs), beam unstable, kept tripping. Lowered to 105 uA, it became stable.
    20:14 BPM12X+ saturation (Halog 30115).
    22:12 beam became unstable.
    MCC reduced beam current from 105uA to 95 uA (Hall A average 93 uA).
    22:40 Stopped Compton run 21102. Endrun failed, did coda reboot.
    22:43 Started a new Compton run 21103.
    23:10 BPM12X+ saturation.
    23:15 Compton HV tripped and reset.
    23:30 with 1.002 M for slug 5 BHWP OUT, requested BHWP IN (after get agreement from Hall B, stopped all runs, including Compton run).
    Ran flipper, increment slug to 6.
    Started new Happex run, HRS (L/R) runs and Compton run.

    production run information:
    Happex runs
    14062 15:44-16:39, low current, 25 uA on LD2. BHWP OUT.
    14063 16:42-16:54, 25 uA.
    14064 17:01-17:56, 104 uA.
    14065 17:58-18:53, 104 uA.
    14066 18:54-19:50, 104uA.
    14067 19:51-20:47, 104 uA. (no HRS runs)
    14068 20:49-21:44, 104 uA.
    14069 21:54-22:42, 104->94 uA.
    14070 22:44-23:36, 94 uA. stopp when reached 1M, last run for slug 5 with BHWP OUT.
    14071 23:36-, 94 uA, BHWP IN, still on going at the end of shift.

    HRS L/R runs
    5160/25606 15:43-16:12, low current, 25 uA on LD2, BHWP OUT.
    5161/25607 16:13-16:39, 25 uA
    5162/25608 16:45-16:54, 25 uA.
    5163/25609 17:02-17:56, 104 uA.
    5164/25610 17:59-18:53, 104 uA.
    5165 short run.
    5166/25611 18:54-19:50, 104 uA.
    5167/25612 20:48-21:45, 104 uA.
    5168/25613 21:54-22:43, 104->94 uA.
    5169/25614 22:43-23:28, 94 uA, stopped when reached 1M good paires.
    last run for slug 5 with IHWP OUT.
    5170/25615 23:35- 94 uA. still ongoing at the end of shift.