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Reports until 10:49, Thursday 08 October 2026
H1 ISC (OpsInfo)
oli.patane@LIGO.ORG - posted 10:49, Thursday 08 October 2026 (92246)
Morning initial alignment - ALS weirdness

ALSY
- ALSY started having glitches while locked. Once WFS (DOF1,2,3) turned on, ALSY was dragged down (ndscope1)
- Tried just ETM and TMS WFS, were pulling ALSY away(ndscope2)
- Tried turning WFS on one at a time, they wouldn't converge
- Hand aligned EY, TMSY, and IY with some WFS on. Some eventually were converging very slowly(ndscope3)
- We also noticed that the SUMs and NSUMs for Y WFS A and WFS B were lower than normal. They're still clearly on the PD, but maybe there's a little bit of clipping that could be the cause for the WFS not converging/working correctly? (ndscope4)
    - Note that the WFS DC centering was working correctly

ALSX
- White it was locked, ALSX quickly dropped out and came back, causing some big oscillation glitches in the WFS. This happened a couple times close in time. We're not sure why the dropouts happened, or why the WFS reacted the way they did instead of turning off.(ndscope5)

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