Jennie W, Sheila, Jenne
Sheila and I moved SR2 yaw to centre the beam on ASC_AS_C QPD.
Then we changed OM1 pitch and yaw to centre on WFS ASC_AS_B.
Then we changed OM2 pitch and yaw to centre on WFS ASC_AS_A.
After this we were able to turn on the DC 3 & 4 centering loops.
The first image shows the alignment at this point.
Then Jenne tagged in.
We aligned OM3 to bring the beam back onto centre on QPD A and B.
At this point we tried to turn on the OMC ASC loops but the OMC suspension saturated.
Accidentally clicked 'Offload OM Alignment' button on centering screen but this did not seem to do anything.
Changed POS X and ANG Y gain signs in servo.
The ASC loops still go running off (ie. do not converge).
We turned back on DC centering 3 loops 3 and 4 to stay centred on the AS_{A,B} but these do not do much to the spots.
Turned on OMC ASC loops and they did not converge and the OMC suspension saturated again.
We think this sign convention is definitely wrong so we flipped POS X and ANG Y signs back.
For reference they now have positive gain in POS X loop and negative gain in ANG Y loop.
Turning on the ASC still saturates the OMC SUS.
We turned on the SR2C P and Y loops to keep the beam centred on AS_C QPD.
The nest thing we tried was aligning SR3 to improve the alignment on A and B QPDs and hopefully stop the OMC suspension saturating (we thought maybe this might improve pointing into HAM6).
I stepped the SR3 pitch up in steps of 6 microradians and the loops move to correct the alignment with SR2, OM1 and OM2 so this corre4cts the QPD alignment. It was hard to see any change for the better on QPD A and B.
We also tried the same steps for PR2 but down in yaw and this also did not improve the alignment on QPD A and B overall.
I turned off the DC centering and SRC2 loops and we cleared the history for SRC2 which may have changed the alignment somewhat.
Here is the alignment changes we made in the second image.
I also walked back the alignment changes on SR3 and PR2 relative to this image.
Leaving the OMC ASC and OMC length locking off also.
The thirs image shows that Jenne turned the gain of SRC2 up from 10 to 40 so the loop would converge faster.
