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User name Zafar/Bob
Log entry time 20:00:29 on September 2,2009
Entry number 287552
This entry is a followup to: 287546
Followups:
keyword=cavities vs striplines for stable beam.When cutting on a region of stable beam current the correlation
of cavities to striplines is much cleaner (fig 1).
There's still a problem that part of the cavity donut is squashed.
Probably a saturation because the signal is proportional to the
product I*X (I=current, X=position). We guess the cavity gains
were set at 70 uA or whatever, and now at 100 uA they saturate.
This would be hard to see in integrating mode which integrates over
the raster motion. We'll ask for J. Musson to reduce gains
by 25% if possible. (I think he has a slide bar.)
This may also be the way to fix the bcmcav3 problem in the
HAPPEX DAQ.
FIGURE 1
