(Jenne, Corey)
Summary: Everything OK from recovery last night, other than X-arm Dark Offset, but that was corrected quickly, with guidance.
Mainly these are notes I recorded after coming in after the computer issues from last night.
Restore Notes:
- X-Arm Dark Offsets: Jenne noted this is not addressed with our scripts (and they are checked/set every time we lock). So I just adjusted this (H1:LSC-TR_X_QPD_B_SUM_OFFSET) by hand to take the TR_X_NORM signal from ~0.5 down to 0.0.
- TCS Situation After 50W state last night: Jenne checked this because she worried we might have a long (like ~36hrs) temperature effects to deal with, but she checked and we looked good.
Locking & Alignment Notes:
- Took IMC Lock from OFFLINE to Locking. And started locking w/ ISC_LOCK (but needed to run an init to get all guardian nodes under the Master). IMC locked immediately, ALSx looked fine. ALSy was not locking.
- ALSY Green alignment: PAUSED ISC_LOCK & took ALSY to UNLOCKED and tweaked ETMy to maximize flashes. Once they were up to 1, locked it up w/ no WFS and tweaked ETMy a little more. Then tweaked TMS pit a few clicks to maximize up near 1.1.
- Continued with locking. DRMI locked quick & its alignment was nice, so moved on to INCREASE POWER.
- Tidal Error: Had connection errors for LSC tidal X & Y (17:22utc), but they both re-connected within 2-minutes.
ISI_CONFIG: Set to USEISM
Locking & Alignment Notes (cont):
Summary: SUS ISC Pit & Yaw gains were at 0.
We were stuck in ENGAGE_ASC_FOR_FULL_IFO for a longer time than its normal ~5-10min I have seen. So, looking at stuff, I noticed the SRC2_Y on Wall was drifting & mentioned to Jenne. This led Jenne to notice 0-gains on several suspension's pit & yaw ISC Input Filters (such as SR2's H1:SUS-SR2_M3_ISCINF_Y_GAIN) and they were zeroed last night around 1am. She found this issue with the RMs & SR2.
SDF confirmed they should be 1.0 for the ones in question.