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    User name Reitz

    Log entry time 00:01:19 on February 8,2003

    Entry number 95249

    keyword=shift summary

    16:00 - 17:45 Moeller measurement
    17:55 NMR measurement done
    going to BeO Target and asking for 2 uA beam

    run 20819, BeO, 2uA, Pos: 1/-2, Raster On, gen 2829,2830
    run 20820, BeO, 0.5uA, Pos: 1/-2, Raster On, gen 2831

    went to empty Reference cell, rate is much higher than
    expected, seems like we are hitting the wall, change of
    rastersize does not help. since there is not enough time to
    find the right alignment, we will skip the reference cell

    going to empty target position, 4 mm raster, pos +1/-2, gen run 2832


    Make an access to set up the trigger for coincidence measurements. The
    phones and computers go out, so we exit the Hall without finishing the trigger.

    At around 8:30, the computers are back, so Bodo finishes the trigger setup.

    Around 9:15 we put beam back on the BeO/C target. Kinematics are as
    follows:

    Run 20821: BeO, Pe=1.306 GeV/c, I=2 uA
    Threshold on neutron det=1664 (corresponds to 50 MeVee)
    Trigger rate on neutron det=143 kHz, DAQ rate=50 Hz
    Spot size= x:y (+/- 2 mm, +/- 3 mm)
    Stop time=9:55 pm, 100k events

    Run 20822: BeO, Pe=1.306 GeV/c, I=2 uA
    Threshold on neutron det=1664
    Stop time=10:32 pm, 105k events

    Run 20823: BeO, Pe=800 MeV/c, I=2 uA
    Threshold on neutron det=1664
    Trigger rate on neutron det=146 kHz, DAQ rate=72 kHz
    Stop time: 11:08 pm, 99k events

    11:10 pm
    Patricia does an NMR measurement. Using the old EPR/NMR calibration (2.79)
    the polarization is about ~31%.

    11:20 pm
    Move to polarized 3He target. Change LHRS momentum to 1.338 GeV/c.

    11:25 pm
    Call in Gary and Todd to move detectors at midnight

    Run 2849: Neutron detector DAQ rate: 48 kHz, Threshold: 1920, 0.5uA
    Run 2850: Same as 2849
    Run 2851: Neutron detector DAQ rate: 26 kHz, Threshold: 1792, 0.5uA
    Run 2852: Neutron detector DAQ rate: 18 kHz, Threshold: 1664, 0.5uA
    Run 2853: Neutron detector DAQ rate: no beam
    Run 2854: Neutron detector DAQ rate: 14 kHz, Threshold: 1536, 0.5uA
    Run 2855: Neutron detector DAQ rate: 11 kHz, Threshold: 1408, 0.5uA
    Run 2856: Neutron detector DAQ rate: 9 kHz, Threshold 1280, 0.5uA

    Finished threhold scan on polarized 3He target. Move to empty target to
    check DAQ rate.

    Run 2857: Neutron detector DAQ rate: 60 kHz, Threshold 1664, 2uA

    11:56: Call for access to put the Hall in order