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User name V. Sulkosky
Log entry time 07:55:03 on September 11, 2009
Entry number 289079
Followups:
keyword=Raster Signal Check L-HRSUsing run 24690, I checked the rastered beam signals versus the
unrastered BPM signals. Due to the phase difference, we expect to see
an oval shape in a 2D plot of the unrastered beam position versus raster
current.
Fig. 1 shows the unrastered x position versus raster x current.
Fig. 2 shows the unrastered x position versus raster y current.
Fig. 3 shows the unrastered y position versus raster x current.
These plots show that unrastered x is correlated with raster y and
unrastered y is correlated with raster x. This is opposite to what the
correlation should be, which seems to indicate that the raster current
signals at least going to the left HRS are swapped. This has been the
case since at least spring 2008.
A copy of this log entry has been emailed to: rom,camsonne,paschke,rsubedi
Unrastered X vs Raster X Current
Unrastered X vs Raster Y current
Unrastered Y vs Raster X current
