TITLE: 02/17 Day Shift: 1530-0030 UTC (0730-1630 PST), all times posted in UTC
STATE of H1: Aligning
INCOMING OPERATOR: Oli
SHIFT SUMMARY: H1 has been locked for 3 hours. As I'm posting this, H1 is unlocked and running an alignment. One lockloss this morning, then much of the shift was spent attempting to relock H1 with several failed attempts. After relocking, we noticed the range was noticeably lower than recent locks and that DARM in higher frequencies looked poor, pointing to SQZ not being optimized.
SQZ Troubleshooting: I started by just trying to take SQZ_MANAGER to 'DOWN' then back up to 'FREQ_DEP_SQZ' to see if that would fix the range issue, but the FC ASC was not turning on after the FC locked. The SQZ-FC_ASC_TRIGGER_INMON was not reaching its threshold of 3 to turn ASC on, so I thought improving FC alignment by adjusting FC2 might help. Ultimately, after following the FC alignment instructions from the SQZ troubleshooting wiki, the FC would not lock at all in IR, so I reverted my FC2 move and then attempted to adjust the OPO temperature. Again following the instructions on the wiki, with SQZ_MANAGER in 'LOCK_CF,' I was able to improve SQZ-CLF_REFL_RF6_ABS_OUPUT and the FC was able to lock successfully with ASC on. After then taking SQZ_MANAGER all the way up to 'FREQ_DEP_SQZ,' I again adjusted the OPO temperature (in the other direction) as both the inspiral range and SQZ BLRMS looked worse than when we had started. I was able to bring these back to about where they were when I dropped observing, so ultimately this adventure didn't provide much improvement. H1 then returned to observing.
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