(Alexa, Evan, Dan, Nic, Sheila)
We wanted to try DRMI with the arms off resonance again, but were running into some troubles. We haven't really paid any attention to input alignment since maintence day happened... First, when we lock PRX and use the wfs to align PRM the ASAIR build-up is too low by a factor of 2. It's possible that our alignment onto ASAIR has degraded since Keita adjust SR2, SR3, especially given that the image position on the camera has moved so much. More concerning is the fact that when we try to lock PRMI on the SB the POPAIR18 build-up is also very low; the maximum we got was 200ish; when we expect more like 360. We did not have a chance to try DRMI, or investigate too deeply into the PRC gain because of the beckhoff issues.
It might be that we've been following the temperature drift in the LVEA. There has been a big downward temperature spike, then the FMCS responded, and totally totally overshot.
In the attached, colored vertical lines indicate Suresh's laser change, Hugh's HAM2 change and commissioners' changing input alignment. From the HAM2 oplev, Hugh's work looks like a minimal impact.
But the time the commissioners responded to whatever change by turning the mirrors corresponds to the temperature change.