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Reports until 02:05, Sunday 06 October 2024
H1 General (SQZ)
ryan.short@LIGO.ORG - posted 02:05, Sunday 06 October 2024 (80490)
SQZ "PMC_PZT_OK" Threshold Lowered

H1 called for assistance at 08:39 UTC after reaching NLN successfully but being unable to start observing due to an issue with SQZ. I found the issue was that the PMC was consistently locking between 11-12V, and because of the lower bound of 15V in the check recently added to unlock and relock the PMC when outside of a comfortable range (see alog80371), SQZ_MANAGER would repeatedly unlock the PMC once it reached FDS_READY_IFO. Since the PMC seemed happy at this 11-12V point, for now I've changed the lower threshold for the PMC PZT check from 15V to 10V (line 73). SQZ_MANAGER injected squeezing just fine after that, and H1 started observing at 08:55 UTC.

Displaying report 1-1 of 1.