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    User name V. Sulkosky

    Log entry time 07:58:24 on December 03, 2010

    Entry number 342534

    keyword=Owl Shift Summary, December 3

    December 3, 2010
    SL: Vincent Sulkosky
    TO: Hoyoung Kang
    3rd: Hyekoo Kang

    Owl Shift Summary:
    ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
    Plan: Production on Kin-3 high
    Kinematic settings: energy = 5.550 GeV; left HRS P0 = 2.591 GeV/c; left HRS angle = 21.5 degs.

    00:00 Begin Shift with run 9206 in progress.
    00:06 Beam current at 3.2 uA causing high deadtime, asked MCC to drop current to 2.8 uA.
    00:57 Current briefly went up to about 3.1 uA, while Hall C had gone down in current.
              With Hall C current returning to normal, our current is now 2.9 uA.
    02:15 Notified Carlos to enable writing to adaql1 disks, since adaql2 disks are near being full.
    02:27 Hall C's current decreased increasing our current to about 3.1 uA and the deadtime went over 20%.
              I asked the MCC operators to readjust our current to keep it at 2.9 uA, when Hall C's current decreases.
    04:10 Detectors Flammable Gas Sensor in alarm for the gas shed.
              Consulted the run coordinator. I pressed the accept/reset button and it stopped the alarm and cleared the red LED.
    04:30 Flammable gas sensor for the gas shed went off again. Pressing accept/reset cleared the alarm and LED again.
    06:46 Current had dipped to about 2.6 uA. Asked MCC to take us back to 2.8 uA.
    07:06 Reported to MCC ABU 7.58; BANU 0.06.
    07:09 Current has dipped to about 2.65 uA. Asked MCC to take us back to 2.8 uA
    07:16 Zone 2L04 helium level has an issue.
    07:40 Talked to MCC, it is not likely that we will see beam again this shift.
    07:57 Still waiting for beam to return.

    Run Summary:
     Run #   Events   BCM U3 [C]   BCM D3 [C]   Time   Average Beam Current    Deadtime [%]   Target   Comments 
    9206 1166 k 0.01069 0.01074 61.2 mins 2.9179 uA 20.25 L2 15 cm (LH2) Production
    9207 1118 k 0.01016 0.01014 60.6 mins 2.7908 uA 18.53 L2 15 cm (LH2) Production
    9208 1084 k 0.00994 0.00999 60.0 mins 2.7650 uA 21.40 L2 15 cm (LH2) Production
    9209 1120 k 0.01008 0.01010 59.6 mins 2.8238 uA 15.80 L2 15 cm (LH2) Production
    9210 1091 k 0.00972 0.00971 59.8 mins 2.7056 uA 18.92 L2 15 cm (LH2) Production
    9211 1081 k 0.00966 0.00971 60.1 mins 2.6856 uA 13.82 L2 15 cm (LH2) Production
    9212 1023 k 0.00905 0.00904 62.0 mins 2.4298 uA 18.37 L2 15 cm (LH2) Production
    9213 468 k 0.00401 0.00399 43.3 mins 1.5399 uA 17.76 L2 15 cm (LH2) Production

    For run 9213 beam was lost around 7:15 am, so only about half of the run has useful beam.