Summary: H1 was out of OBSERVING from 14:04 - 17:05 utc. (Remains locked throught all of this.) Multiple activities noted below (& I'm sure alogged in-detail by others).
Squeezer ASC (Alignment) Drift Begins After Maintenance (Sheila, Jim, Corey)
Jim experienced issues with the Squeezer during his shift and we were not able to bring it back. Sheila arrived and investigated (I'm sure she'll summarize). First change she made was related to logic for the Beam Diverter. But it looks like the main change was a noticeable drift in alignment for the Squeezer which started pretty much from the beginning of this current lock (which was first one after Maintenance).
Sheila turned OFF SQZ ASC, and then made adjustments (offset values added) to fix the Sqeezer ASC system. BUT we want to monitor the Squeezer for (1) alignment drifts and (2) if we want to keep these new offsets.
OBSERVATORY MODE Notes: For most of the out-of-OBSERVING time, Observatory Mode was in UNKNOWN state. Once Sheila was happy with Squeezer, I had transitioned to the CORRECTIVE MAINTENANCE state for a few minutes, and then we went to OBSERVING.
PCalx (Ethan, Sheila, Evan)
While Sheila was addressing the Squeezer she noticed the PCalx (pink) trace on the running DARM spectra on the wall increased broadband (almost up to DARM level!). Went to get Ethan for help. They discovered a switch randomly turned OFF (coincidentally while Sheila was working on Squeezer!). Ethan/Sheila toggled the switch and PCalx is back to normal.
CDS (Dave, Corey, Sheila)
Dave called in (coincidentally while we were still out of OBSERVING & addressing Squeezer) because of errors he noticed on the CDS Overview. In order to proactively clear these, he phoned in. Since we were out of OBSERVING:
- SUSAUXB123 was DIAG RESET by Dave (around this time the PCalx issue was noticed...probably not related, just noting)
- SUSPROC & SUSETM had Filter Change errors (CFC). Dave wanted us to confirm these are known changes (because we wouldn't want a crash to happen during the holidays and these changes come up without being known/approved). Attached is a snapshot of the errors/notes.
- SUSPROC was related to ETMy MODE12 filter change & Rahul approved a COEFF LOAD
- SUSETM was related to ETMy TRamp change from Sudarshan/Sheila work yesterday. This was approved by Sheila & we clicked COEFF LOAD.
HAM6 RGA End Cap Unplugged (Chandra, Robert)
This RGA was brought up as a noise source. Since we were out of OBSERVING, Chandra quietly walked out to it at the HAM6 End Cap door (with Sheila giving OK). She unplugged/plugged for a few secs and then left unplugged.
Back To OBSERVING!
There were some SDF diffs, but these were related to ZM1/2 alignment changes and Sheila had me accept. Sheila mentioned she had some time later today for some other Squeezer Work, but she might use this time to check up on the Squeezer post-changes from this morning.
