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User name dalton
Log entry time 11:51:58 on November12,2009
Entry number 299177
This entry is a followup to: 299089
Followups:
- 299224 11/12/09 14:48 dalton Compton laser alignment tweak
- 299368 11/12/09 22:58 M Friend Compton laser power decrease
I notice that a period where there signal on QPD1 on the table has spikes in it, both x any y directions. This doesn't happen for QPD2. It's not clear whether the laser beam actually moves or something else is going on. This is potentially something to be quite worried about, if it indicates that there is radiation on the table.
On the other hand this seems to be an isolated incident and doesn't occur every time the beam is on (see figure 2 corresponing to the time shown in log 299089.)
FIGURE 1
FIGURE 2
