Reports until 10:40, Saturday 21 October 2023
H1 General
ryan.crouch@LIGO.ORG - posted 10:40, Saturday 21 October 2023 - last comment - 13:16, Saturday 21 October 2023(73637)
OPS Saturday day shift update

Kept losing lock from green arms, the ALS error signals didn't look great, so I started an Initial alignment at 15:12UTC which finished at 15:33UTC. I kept losing it at ALS from XARM_WFS_DOF1_P so I turned it off (I had to do this every lock attempt) and then DIFF_IR kept reported "IR not actually found" so I had to move it around by hand. During PRMI I misaligned PRM to check on the BS and it looked great on AS_AIR, guardian took us to CHECK_MICH while I was in the middle of checking the BS.

Defiantly something is misaligned, I couldn't get PRMI for a while and finally I tried to adjust SR3 in yaw to match its OPLEV from before the glitch and that got PRMI to finally lock, but it was unstable and lost it soon after, so something else is still badly aligned, the PIT signal looked good for SR3 based on the OPLEVS. PR3 OPLEV looks a little different as well so I adjusted it back to where it was.

I have to slowly step up in states to not lose lock going through ALS and IR, even with the DOF dance Xarm just loses it for seemingly no reason. I tried requesting LOCK_SLOW_NO_WFS let it settle in LOCKING_GREEN_ARMS then requested LOCKING_ALS and I did not have to turn off any WFS for Xarm. In CHECK_IR DIFF IR was not really found as it hasn't been every attempt. As I was trying to find DIFF_IR we went to EQ mode and lost lock from the quick ground motion increase (5.0 from Mexico?). I going to go make a cup of coffee while the ground motion calms down.

Comments related to this report
ryan.crouch@LIGO.ORG - 11:07, Saturday 21 October 2023 (73643)

After then getting zero flashes on PRMI after getting back up, I decided to try to restore all the sliders to when we were locking before the previous lock (10/19 18:19UTC) at 18:03UTC. The arms are going through increase flashes now.

Things seemed worse after the IA that I ran? During the IA everything looked good though, the signals were all reasonable and AS_AIR looked correct after each section. If this restore all doesn't help I'm going to restore things to how they were after Camilla finshed her IA earlier in the morning (~14:00UTC)

ryan.crouch@LIGO.ORG - 11:30, Saturday 21 October 2023 (73644)

Going through each state manually and slowly, no Xarm issues this time, IR seems to be looking good too. AS_AIR looks bad at DRMI. Lockloss at CHECK_MICH

ryan.crouch@LIGO.ORG - 12:04, Saturday 21 October 2023 (73646)

After talking with Jenne, I'm runing another intial alignment and I did not restore the optics to after Camillas IA. We're still at the 10/19 18:19UTC alignment that I restored too.

ryan.crouch@LIGO.ORG - 13:16, Saturday 21 October 2023 (73647)

Reaquired NLN at 20:16, waiting for ADS to converge to go into observing.