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    User name adaq

    Log entry time 08:10:11 on October 1, 1998

    Entry number 2052

    keyword=Beam Time Accounting
    Hall A

    10/1/1998 0000-0800
    Experiment #: E94-010
    Shift Leader: Deur A.
    Shift Workers: Kominis I., Rowntree D., Slifer K.

    00000100020003000400050006000700Total Time
    Acceptable Beam
    in Use
    1 45 55 1 45 1 45 1 7.16666666666667
    Beam Available
    but Not in Use
    0 15 5 0 15 0 15 0 0.833333333333333
    Beam Not Available
    or Unacceptable
    0 0 0 0 0 0 0 0 0
    Accelerator Con-
    figuration Chage
    0 0 0 0 0 0 0 0 0
    Experiment
    Ready
    1 45 55 1 45 1 45 1 7.16666666666667
    Planned Config-
    uration Change
    0 0 0 0 0 0 15 0 0.25
    Unplanned
    Experiment Down
    0 15 5 0 15 0 0 00.583333333333333
    Hall not
    ready reasons
    Target 0 0 0 0 0 0 0 0 0
    HRSe 0 0 0 0 0 0 0 0 0
    HRSh 0 15 0 0 15 0 15 0 0.75
    Data Acq 0 0 5 0 0 0 0 0 0.0833333333333333
    Other 0 0 0 0 0 0 0 0 0

    Comments: 00:00 NMR: target polarization 12 % 0:09 began run on empty target (collimators out, Ep=1.607 GeV/c) 00:50 High deadtime when the beam is well tuned and low when the beam is off by X=-0.5 (offset on the target position ?) -->we had to decrease the raster size 1:45 Q1 hadron tripped 2:04 coda crashed, then began N2 run at 5 atm 3:20 NMR measurement 22 % target polarization 4:19 Q1 hadron tripped 3:35 empty cell run, collimators in, Ep=1.484 GeV/c 4:45 empty cell run, collimators out, Ep=1.484 GeV/c 5:16 coda crashed (deadtime at 100 %, rate at 0 Hz and no update of the data mon. and the number of events when we started a new run. 5:45 NMR : 26 % target polarization 5:56 began runs on N2 at 5 atm. 6:44 lost Q1 hadron, end the N2 run 7:00 NMR : 27.6 % target polarization. As the polarization is high enough we decide to change the runplan and come back to 3He production runs 7:10 begin 3He production runs at Ep=1.484, E=1.719, Theta=15.5 degree

    Data Entry by: Deur A.