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User name D. Parno
Log entry time 10:52:03 on March 6,2009
Entry number 264870
Followups:
- 264871 03/06/09 11:00 D. Parno Compton orbit lock was not on
- 264879 03/06/09 11:32 D. Parno Compton orbit lock restored
Over the past two hours, there was a significant drift in the y-position of the beam in the Compton chicane (Fig. 1; this is the orange line). The y-position became more negative by about -0.12 units.
Interestingly, the photon rates (blue line) remained stable throughout this time. Fig. 2 (from the run taken roughly during the same time as the strip chart shows) displays a measured asymmetry of the same value we'd been seeing before -- not diluted.
FIGURE 1
FIGURE 2
