In the attached plot.. the beam half wave plate was retracted at around 00:10. The width on the charge asymmetry decreases. The reverse was observed when the IHWP was inserted.
In the past, I've observed that a change in width was usually associated with a change in the beam tune. What's going on here?
A copy of this log entry has been emailed to: poelker, suleiman, brads
Figure 1