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User name Sulkosky
Log entry time 21:55:57 on August29,2003
Entry number 114278
Followups:
keyword=Target Tests and EPR Problems.
19:33 Started EPR-NMR calibration with 3 lasers.
Problems with EPR having a choppy signal. This was seen earlier in the day and a couple days ago. Last night at 20:00, the EPR spectrum was good. So I am unsure why it is so bad. This was actually seen right before the maintenance period as well, but until now we had not seen it again. I talked to Xiaochao and Patricia. There are a couple possible causes either a bad photodiode, poor connection with the EPR RF coil, or the PI box. I attempted to switch to the spare PI box but the problem remains. I just replaced the photodiode last week, so it would be unusual for it to go bad so soon. The last alternative is that the EPR coil has a bad connection. For now I decided to move on to the Rotation loss tests.