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    User name Sarty

    Log entry time 00:06:19 on June11,2007

    Entry number 205088

    keyword=Swing Shift Summary

    16:00 Shift starts waiting for beam.
    17:15 Pulsed beam coming into hall.
    17:55 CW beam ready, tuning beam to get beam optics under control.
    19:10 Beam Ready - Harp Scans show acceptable beam spot size
    (MCC harp scan @ 19:07: sigmas u=83.8 um, v =153 um, x=154 um)
    Setting up Raster:
    See halog entry 205061: result is to ask MCC to set raster at "3.5 x 4.5" in order to give us 2mm x 2mm for this new beam energy (2.1 GeV).

    Optics Target run completed (run 1121 @ 20:05) with raster off.
    Switched to 3He, raster on (radiator still out), beam I = 50 uA.

    Run 1122 (20:29 start): oops, forgot to change prescales.
    Run 1123 (20:33 start): oops again: ps4 too low (25% deadtime); coinc. rate (t5) seems to be 3.9 Hz here at 50 uA.
    Run 1124 (20:38 start); prescales fixed (~2% deadtime) using ps1=ps3=3, ps2=6, ps4=600 (end of run T5 rate = 3.8 Hz).

    RADIATOR IN (He3):
    Run 1125 - junk (getting setup; short run, wrong prescales)
    Run 1126 (started @ 21:50): 20 uA all ok with radiator temps.
    Run 1127 (started @ 22:05): 30 uA (T5 rate = 3.9 Hz)
    Run 1128 (started @ 23:00): 30 uA ... until end of shift.