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User name D. Parno
Log entry time 10:28:17 on November24,2008
Entry number 250539
keyword=Shift in BPM xThere is a distinct shift of a little over -0.2 mm in the BPM-A measurement of the beam x position. (There is no shift in BPM-B x, and a smaller shift in the target BPM x). The Hall A tools screen displays a shift of ~0.15 mm from the desired value.
Fig. 1 is from Run 3864, which finished at 10:00 this morning. The earliest run I could find displaying this shift was Run 3832 from Sunday morning's owl shift (Fig. 2). Prior to this run the beam position was a bit unstable.
The trigger rates look OK.
FIGURE 1
FIGURE 2
