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    User name R. Feuerbach

    Log entry time 08:01:30 on February16,2007

    Entry number 193572

    keyword=Owl shift summary

    Shift crew: Robert Feuerbach, Aidan Kelleher

    Conditions: 1 msr collimator in place for the L-HRS. At kinematics X (LHRS at 14.000deg, RHRS at 24.000deg) running as low in rate as possible to maximize the VDC efficiency.

    0:05 Run 6445/26423 was high deadtime/junk run.
    2:07 Move to 15 deg. (15.002) for kin X', start run 6452.
    3:00 Called R.C. and discussed taking data with B4C at 0.1 microamps, which might not be able to be used for a cross-section but could be used to correct for the VDC inefficiency.

    3:30 Moved back to B4C target to take data at 0.1 microamps.
    5:25 Moved spectrometer to 16deg for kin Y.
    5:46 QE measurement.



    Run Summary



    
Run          Kin    Target   Start   Comment
    
6446/26424    X       C      0:11     0.27 microamps
    
6447/26425    X       C      0:28     0.27 microamps
    
6448/26426    X       B4C    0:52     0.27 microamps ~10% VDC ineff.
    
6449/26427    X       B4C    1:09     0.27 microamps
    
6450/26428    X       B4C    1:27     0.19 microamps ~6% VDC ineff.
    
6451/26429    X       B4C    1:46     0.19 microamps
    
    at 15 deg.
    
6452/26430    X'      B4C    2:10     0.19 microamps ~6% VDC ineff.
    
6453/26431    X'      B4C    2:30     0.19 microamps
    
6454/26432    X'      Li     2:53     0.19 microamps <3% VDC ineff.
    
6455/26433    X'      Li     3:12     0.19 microamps
    
6456/26434    X'      B4C    3:33     0.10 microamps <~3% VDC ineff.
    
6457/26435    X'      B4C    3:46     0.10 microamps
    
6458/26436    X'      C      4:07     0.20 microamps <.5% VDC ineff.
    
6459/26437    X'      C      4:23     0.20 microamps
    
6460/26438    X'      Ta     4:48     0.54 microamps
    
6461/26439    X'      Ta     5:05     0.54 microamps
    
    at 16 deg.
    
6462/26440    Y       Ta     5:30     0.54 microamps
    
6463/26441    Y       Ta     5:45     0.60 microamps -- trip and QE
    
6464/26442    Y       Ta     5:54     0.49 microamps
    
6465/26443    Y       C      6:17     0.20 microamps
    
6466/26444    Y       C      6:34     0.20 microamps
    
6467/26445    Y       B4C    6:54     0.20 microamps
    
6468/26446    Y       B4C    7:12     0.20 microamps
    
6469/26447    Y       Li     7:33     0.20 microamps
    
6470/26448    Y       Li     7:51     0.20 microamps (ongoing)