ryan.short@LIGO.ORG - posted 18:27, Saturday 01 February 2025 - last comment - 20:01, Saturday 01 February 2025(82582)
Lockloss @ 02:03 UTC
Lockloss @ 02:03 UTC - link to lockloss tool
No obvious cause, but there's an ETMX glitch immediately prior. End lock stretch at 16.5 hours.
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H1 back to observing at 03:53 UTC.
I went immediately into an initial alignment to see if the ALS dropout issues were seen, and they were not. Since I believe this is the third time we've seen IA make the dropouts go away, is there something different about IA that fixes them?
Even with an alignment, relocking still took a while as there were ETMX saturations starting at DARM_TO_RF that eventually caused a lockloss during CARM_OFFSET_REDUCTION. Also, DRMI took a while to lock even with decent flashes.