TITLE: 11/21 Day Shift: 16:00-00:00 UTC (08:00-16:00 PST), all times posted in UTC
STATE of H1: Preventive Maintenance
INCOMING OPERATOR: Corey
SHIFT SUMMARY: Busy maintenance day; SQZ cabling (PMC, OMC), PSL Refcav alignment, ISS 2nd loop, VAC turbopump checks, valves and gauges added to FCT, ALS laser adjustments at EX, HWS work also at EX, cleanroom building at EY, and camera fibers reseeded in the MSR. Back to NLN at 06:00UTC! Lockloss 12 seconds later :(

HAM7 ISI tripped at 17:59 and 18:03 presumably from the SQZ rack work, HAM2 ISI tripped at 18:19 from the measurements being run on HAM2/3. Picket-fence plot died around 18:05 but was able to restart itself after 2 tries and ~5 minutes. Microseism is the highest its been in ~265 days, above the 90th percentile for the past ~12 hours.

Something happened at EndX at 19:29:21, the ISIs state1&2 tripped and so did the HEPI, not sure why, there was no one down there at the time and a DAQ restart was underway. All the sei signals went to zero, the SUS seems fine. After lots of checks and other restarts Erik went down to EX to physically powercycle some chassis, AA, IOP, Fil later joined him, the -18V DC Kepco power supply was found to have failed. FRS ticket 29752, alog74341

21:18 Started to relock

• Green arms went through some rounds of increase flashes (1 for X, 2 for Y), Y arm eventually said "Find by hand" and then I brought it to unlocked and found it by hand (I had to touch ETMY, TMSY, & ITMY) and got flashes to about 95% and then it was able to lock
• Small flashes on DRMI, nothing on PRMI, CHECK_MICH couldn't get MICH_BRIGHT and neither could I by hand so I went to an Initial alignment at 22:26UTC where I had to intervene during SRC/SRY locking and touched SRM. Finished at 22:54
• PRMI was able to easily lock afterwords but DRMI still struggled despite decent flashes, after 4 PRMI locks we were able to lock DRMI
• Violins were a little high

LOG: