Things that Jeff B and I have done:
Jeff was having difficulty locking the X arm in IR for inital alignment. Jeff moved SR3 pit to bring witness and oplev back to where they were before the power outage (both indicated that it lost 1-2urad of pit in the outage) (Still could not lock X arm in IR) Jeff re-ran the green WFS alignment, and moved PR3 by 0.5 urad in yaw.
checked all shutters to retore them to the way they were before the outage. (opened ISCT1 spare, IOT2L spare, and X end fiber.) This uncovered an interesting bug, which is that if theX green beam shutter is open, and the fiber shutter is closed, opening the fiber shutter will close the green beam shutter. In most other situations both of these shutters seem to work fine.
After this the X arm locked. Jeff went through the rest of inital alingment without incident until SRC align. Since SR3 was closer to the alignment from before the outage, we re-engaged the cage servo, which was turned off earlier probably because SR3 had moved. the SRC alignment was way off when we started the SRC align step and Jeff aligned by hand to get us close.
We then were able to lock DRMI several times, but had difficulty engaging DRMI ASC as people described last night. We tried doing things by hand, it seemed like we were OK engaging the MICH and INP1 loops, but PRC2 was a problem. In august, Evan and I changed the input matrix for this loop to no longer use refl 45 (alog 20811.) I found the old input matrix in the svn and tried it. This worked once so I've reverted the matrix in the guardian.
Input matrix for PRC2 since august 24th: refl91A-refl9IB
input matrix before august 24th and now:
# PRC2 REFLA45I - REFLA9I
asc_intrix_pit['PRC2', 'REFL_A_RF45_I'] = asc_intrix_yaw['PRC2', 'REFL_A_RF45_I'] = 0.83
asc_intrix_pit['PRC2', 'REFL_A_RF9_I'] = asc_intrix_yaw['PRC2', 'REFL_A_RF9_I'] = 0.5
asc_intrix_pit['PRC2', 'REFL_B_RF9_I'] = asc_intrix_yaw['PRC2', 'REFL_B_RF9_I'] = 0.5
asc_intrix_pit['PRC2', 'REFL_B_RF45_I'] = asc_intrix_yaw['PRC2', 'REFL_B_RF45_I'] = 0.83
This matrix gets reset in the full lock ASC engage states, so this is not a change to the full lock configuration.
After this change we made it past DRMI, to the point where DHARD WFS are engaged durring the CARM offset reduction. The bounce and roll modes are rung up, we spent a few minutes damping them but probably moved on too soon and lost lock probably due to roll modes in the final stages of CARM offset reduction.
Kiwamu and I spent about 15 minutes locked at CARM 10 picometers to damp bounce and roll. We lost lock after that, possibly because the IFO got misaligned as we were sitting at 10pm damping.
In the next lock, we saw that ETMX violin modes are also rung up, Kiwamu lowered the damping gains to stop PUM saturations.
We made it through engaging the ASC in full lock, and found that we couldn't lock the OMC because the Kepco power supply was off.
After we made it to low noise, I cleared 82 diffs in the ASC SDF. Most of these were due to the dark offset script that Jenne and Jeff ran last night. I accidentally accepted all of these with one button click (I hit accept all assuming that was only the first page which I could read, but accept all really means accept all.) Betsy pointed me to the last version to be accepted in SDF, so I was ble to check on the things I had inadvertently accepted. There were a few oddball things, like ADS SIG DEMOD TRAMPS, (I accepted the new 3 second TRAMPs), and offsets in the SRC1 loops (now set to 0).