User name lkaufman
Log entry time 05:09:50 on July25,2005
Entry number 149381
keyword=helicity-correlated systematics for different beam optics
These are the results of beam position differences, energy differences, and
charge asymmetry for two sets of beam optics and a spot move.
The first section of data is a repeat of the plots I showed in halog 149080 -
data is from owl 7/22.
The middle set of data is from runs taken on owl 7/23 after Jay had changed the
beam optics - now we have phase advance in x, but not y.
The third set of data is from a couple of runs from swing 7/23 with the same
beam optics, but there was a spot move on the cathode.
It seems that the spot move didn't change any of the helicity-correlated
systematics within the error bars. The beam optics change certainly helped to
make the x position differences much smaller while the y position differences
are now significantly
larger. Angle differences are still fairly large in both x and y. Energy
differences don't seem to have changed at all.
Charge asymmetry is under control - it is especially nice to see that feedback