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    User name V. Sulkosky

    Log entry time 08:04:56 on May 04, 2011

    Entry number 358071

    keyword=Owl Shift Summary May 4, 2011

    May 04, 2011
    SL: Vincent Sulkosky
    TO: Zhihong Ye
    3rd: Salvatore Frullani

    Owl Shift Summary:
    ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
    Plan: BCM Calibration and x>2 Production
    Kinematic settings (4.2): 
        energy = 3.356 GeV 
    left HRS P0 = 3.035 GeV/c
    left HRS angle = 23 degs 
    right HRS P0 = 3.035 GeV/c
    right Q3 I = 1059.36 A
    right Q3 P0 = 2.6622 GeV/c
    right angle = -23 degs

    00:00 Start shift with no beam due to BELS problem.
    00:24 Hall is back to beam permit.
    00:40 Hall C asks for Half-wave plate IN.
    00:49 Resume production on Dummy-20cm.
    02:27 Completed running on Dummy-20cm. Move to Carbon-5mm target.
    02:30 Target in place. Asked for 95 uA.
    03:19 Done with Carbon. Move to Ca-40.
    03:21 Increased raster size from 4.5 x 3 MCC units to 6 x 4 MCC units.
    03:23 Target in place. Asked for 40 uA.
    04:55 Completed Ca-40 running. Move to Ca-48.
    04:58 Target in place. Asked for 40 uA.
    05:04 CODA was not taking data during run 4125. Reboot of ROC 10 and BBTS1.
    06:38 Completed Ca-48 running. Move to Dummy-10cm.
    06:41 Asked for raster size 4.5 x 3 MCC units and 40 uA beam.
    07:02 Right Q1 tripped around 350k events during run 4128. Run ended a few minutes after the trip
    07:17 RQ1 is back at 3.035 GeV/c.
    08:00 Run 4130 continues into day shift. 1M triggers should give about 32k good electrons.


    Run Summary:
    Run Events Time [mins] Ibeam [uA] Good Events* Accumulated Events* Deadtime [%] Target Comments
    4117 15.3 k 11.3 0 N/A N/A 4.4 Dummy-20cm Mostly Cosmics
    4118 14.1 k 6.0 1 N/A N/A 16.6 Dummy-20cm Raster Check
    4119 938 k 47.5 40 N/A N/A 16 Dummy-20cm Production
    4120 935 k 48.6 40 N/A N/A 16 Dummy-20cm Production
    4121 654 k 20.0 95 36964 36964 15 Carbon-5mm Production
    4122 658 k 23.3 95 37228 74192 15 Carbon-5mm Production
    4123 1.2 M 50.1 40 34806 34806 11 Ca-40 Production
    4124 953 k 37.0 40 27774 62580 11 Ca-40 Production
    4125 N/A N/A 40 N/A N/A N/A Ca-48 junk
    4126 872 k 42.4 40 30316 30316 10.5 Ca-48 Production
    4127 861 k 48.0 40 30218 60534 10.5 Ca-48 Production
    4128 354 k 18.9 40 10416 10416 23 Dummy-10cm Production, RQ1 tripped
    4129 204 k 11.7 40 3168 13584 23 Dummy-10cm Production, only LHRS
    4130 40 N/A N/A 23 Dummy-10cm Production, both HRS


    *Scaled based on a full replay of events for the run and doubled left HRS counts for the right arm estimate.