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    User name V. Sulkosky

    Log entry time 08:18:47 on September 12, 2009

    Entry number 289207

    This entry is a followup to: 289094


    keyword=re: raster X vs Y

    In Figure 1, I plot the raster X current for two runs taken during owl
    shift, Sept. 12th. Both runs were taken with the carbon foil with hole
    target. Run 24692 was taken with the beam position not at the nominal
    position, and run 24693 was taken at the nominal beam position.
    In the plot of the raster X current, the hole is off center. Though not
    plotted, the hole was reasonably centered for the raster Y current.

    Beam positions for run 24692:
    BPM      X  [mm]    Y [mm]
    A        -0.1       -0.9
    B        -1.3       -0.2
    Beam positions for run 24693:
    BPM      X  [mm]    Y [mm]
    A        -0.2        0.8
    B        -0.8        2.1
    For the two runs, the X position was very close to the nominal position.
    But the y position was off by about 2 mm. By moving the y beam position
    the hole in the raster X current was centered. Hence clearly what
    is labeled as raster X in the analyzer is correlated to the beam Y position.

    A copy of this log entry has been emailed to: rom,camsonne,paschke

    Raster X Current