Reports until 20:23, Tuesday 23 May 2023
H1 General (ISC, SUS)
corey.gray@LIGO.ORG - posted 20:23, Tuesday 23 May 2023 (69869)
Mid-Shift Update: H1 To OBSERVING

After the earlier lockloss, H1 is OBSERVING (first time since dolphin crash).

Sadly, locking was not easy in that there were issues around the LOCKING ALS/FIND IR steps---not clear why this was the case, but eventually made it past those steps.  DRMI did not look good, so opted for PRMI which also did not look good and ultimately selected CHECK MICH FRINGES, and slowly got through PRMI & then mostly no issues getting to NLN (ENGAGE ASC for FULL IFO did take a bit of time to wait for ADS' YAW3 to converge).  After all of this, wonder if running an Initial Alignment would have been better.

While in NLN, Vicky took a handful of minutes to look at squeezer while I was going through SDF.

ACCEPTED all the diffs for the attached nodes (tagging ISC & SUS).

NOTE:  After thermalization, can (1) enable mich/srcl feedforward & (2) run calibration suite.

Images attached to this report