I trended all the optics that I know are in the green light path back to where they were before we lost lock (~10hours ago). TMSY alignment was off by 5.6 um. Adjusting TMSY alone improved the flashes from 0.4 to 0.6. The rest was the combination of ITMY and ETMY adjustment. Seems like I have some magic fingers =p
One mistake that I used to make is that touching either ETM or ITM without realizing that both mirrors have to be aligned with respect to one another. Other than looking at the camera and dataviewer try imagining how optics actually move could be helpful.
OMC seems to have a problem. The shutter is opened but there's no light at the OMC Trans camera. Now stuck at DC_READOUT_TRANSITION.
The first time I hit INIT at OMC_LOCK nothing happened. I tried again and I saw flashes in a bad mode.
OMC alignment was bad. I put OMC_LOCK to Auto and DOWN so ISC_LOCK would stop kicking it and OMC Guardian wouldn't fight my alignment bar (realized this after several WD trips). While I was going through what could have gone wrong with Jenne (we found that LF and RT OSEM DAC outputs were saturated), OMC fixed itself. I tried requested READY_FOR_HANDOFF and it is now locking at the right mode.
GREAT job, Nutsinee!!! So, by your trends it looks like TMSy Pitch was the culprit being off by 5.6um?
I could have sweared I returned it to it's original value and started tweaking ETMy/ITMy, too. But obviously I had no luck! There were periods where I also did get the powers up to over 0.6, BUT I never could get a 0:0. I need to go back to alignment school, I guess!! And you DO have magic fingers!! :) GREAT WORK!!! :)