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    User name Lindgren

    Log entry time 23:56:14 on April29,2006

    Entry number 172446

    keyword=Swing Shift Summary

    Swing Shift Summary
    SL R. Lindgren
    TO M. Shebastri

    Start Run 4332 End Run 4332 0124M Events
    Change beam position to:
    BPMA -1.337 -1.504
    BPMB -1.286 -0.999
    Move target position to empty air position
    Raster 2 x 2 mm^2
    Take 10 minute runs and measure leakage current as a function of raster size
    Run Raster Leakage current
    4333 2 x 2 -73.47,-14.90,-104.4
    4334 3 x 3 -73.50,-15.00,-104.5
    4335 4 x 4 -74.14,-15,12,-104.8
    4336 5 x 5 -74,12,-15.14,-105.1
    Now move target to vacuum referenced cell position
    Take 20 minute runs with about 7.7 ua

    Run Raster Leakage Current
    4337 2 x 2 -51.7,-9.54,-97.0
    4338 3 x 3 -53.8,-9.9,-99.5
    4339 4 x 4 -64.7,-12.7,-112.8

    Put in 137 PSI H2 2 x 2 raster Take data

    20:35 Run 4340 ended. Took 2M events on hydrogen.
    Start Run 4341 on Hydrogen
    20:45 Coda Crashed. Rebooted DAQ.
    20:48 Start Run 4342

    21:55 Hall C request MCC to put HWP IN.
    End Run 4342 1.87 M Events
    Purged H2 from cell.
    Put 50 psi of N2 in cell.
    Run 4314 started 22:01

    22:20 Lowered beam current to 5.3 ua to reduce
    leakage current from 98 to 76 in DC (Channel 9.0)

    22:38 Ended N2 Run 2.0M Events
    Vent and evacuate reference cell
    Move to empty target position
    Call MCC. Steer beam back to original position
    Move to polarized target. Do NMR get 57.4%

    Start Run 4344 Production on polarized He3 target
    DC HV just crashed Reset it.
    Neutron HV GENps1:2004 crashed Reset crate and turn HV ON and OFF
    Noticed that there was a large spike in the beam energy just before crash.
    See Halog entry graph.

    Start Run 4345 23:24 Production Run
    SWing Shift Ends