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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
Followups:
keyword=re: raster X vs YIn 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 -0.2Beam positions for run 24693:
BPM X [mm] Y [mm] ++++++++++++++++++++++++++ A -0.2 0.8 B -0.8 2.1For 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
