corey.gray@LIGO.ORG - posted 09:34, Friday 29 November 2024 - last comment - 15:31, Friday 29 November 2024(81540)
LOCKLOSS @1713utc
H1 had a lockloss in fairly quiet conditions. Lockloss had an "ETM_GLITCH" tag (ETMx, "zoom-in" attached); last time we had one of these was about 3-days ago.
IMC took a few min to acquire after lockloss. ALSx locked, but was driven off by ASC to a pitch misalignment (tried touching up flashes via TMSx, but INCREASE FLASHES immediately took over). DRMI looked ugly, so preemptively went to PRMI (which also looked bad) and then CHECK MICH FRINGES.
Images attached to this report
Comments related to this report
DARM seems to move first, then within 1 ms ETMX L3 moves and DARM moves even more then ETMX L2 moves a lot more. ~150ms later the pattern happens again but the L2 response is larger and we lose lock ~100 ms later. I'm not sure this is actually a ETMX glitch.
Images attached to this comment
