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Reports until 17:02, Monday 22 June 2026
H1 SQZ
camilla.compton@LIGO.ORG - posted 17:02, Monday 22 June 2026 (90698)
SQZT7 Beam profiles/alignment, no progress made.

Eric, Ryan S, Camilla

Went onto SQZT7 and checked on the M^2 profiler. It needed their alignment procedure ran but as we're aren't at a set alignment we did not do this yet.

In the control room we used the ASC set up in 88777 and had to adjust the H1:SQZ-ASC_TRIGGER_THRESH_ON/OFF, it worked well when we changed PSAMS but we then realized we needed a ZM4/5 ASC rather than a ZM5/6 ASC for SQZT7 profiles. Tried just changing the output matrix, did not work. 

Strangely, when I used the SQZ IFO ASC screen's "!graceful clear history", we now have outputs in the LOCK OUTPUTs but the beam looks a lot clearer on AS_AIR camera. We are now in a different alignment than we have been, but it's better on AS_AIR so we'll reassess tomorrow...

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