Sheila, Nic, Evan
The refcav power has steadily declined over the last 10 days. Tonight it got so low that the modecleaner could not maintain lock for longer than a few minutes.
Sheila and Nic have realigned the pointing to the refcav in order to recover the power.
Sheila and Evan measured the FSS path AOM efficiency.
Power levels:
Before the AOM: 64mW
First pass through AOM: 52mW
Second pass: 38mW
First pass efficiency: 81%
Second pass efficiency: 73%
Total efficiency: 59%
here is a trend of the ref cav trans and PSL temperature, its not clear if temperature caused the problem.
This is sheila