Reports until 22:23, Wednesday 09 October 2024
LHO General
ibrahim.abouelfettouh@LIGO.ORG - posted 22:23, Wednesday 09 October 2024 (80581)
OPS Eve Shift Summary

TITLE: 10/10 Eve Shift: 2330-0500 UTC (1630-2200 PST), all times posted in UTC
STATE of H1: Lock Acquisition
INCOMING OPERATOR: TJ
SHIFT SUMMARY:

IFO is LOCKING at CHECK_AS_SHUTTERS (although squeezing is broken).

Overall terrible shift and locking due to many affected suspension sliders due to a dolphin crash at 22:30 UTC (around 4:30 PM). Not one minute spent in observing due to this crash that somehow changed everything. Here's a rough story:

IR Not Found:

IR was not found. Went into Input_Align in Initial_Alignment, bright eyed and optimistic only to realize that this was also not working. Checked the ALS Overview to find that we were getting a beatnote, and that guardian had indeed swept the full frequency range, without finding any resonances. After some finagling and calling Daniel, he pointed me to check IMs and PRs, and indeed IM4 and PR2 were off in P and Y, so I trended those values and then set them to their original. We were able to Find IR, complete initial alignment and went all the way up to NLN.

Unable to SQZ:

Was happy to finally get to NLN (2:07 UTC) but then the SQZ was unable to lock FC. Breaking News: Lockloss due to 40mph winds! Lockloss alog 80579 After a lot of help from Sheila, we managed to get it working again. Now onto locking!

Lock Attempt 2 (and unable to SQZ again):

Got to NLN after losing lock frequently in ALS and PRMI/DRMI (winds). Wind calmed down and we were able to get all the way up to NLN (4:46 UTC) until yet again, SQZ was broken. Around 2 minutes after alerting Sheila, we lost lock again.. Lockloss alog 80580

LOG:

Start Time System Name Location Lazer_Haz Task Time End
01:57 PEM Dan Morraru MSR N LSB Warehouse Connection 02:16