Reports until 10:23, Wednesday 14 June 2023
H1 SQZ (DetChar)
camilla.compton@LIGO.ORG - posted 10:23, Wednesday 14 June 2023 - last comment - 09:35, Thursday 15 June 2023(70440)
SQZ Angle Adjustments 16:45 to 16:55UTC and 17:05 to 17:15UTC

Our range and SQZ BLRMs were low in this lock compared to yesterday so after checking that our RF6 power H1:SQZ-CLF_REFL_RF6_DEMOD_RFMON was still high (Good NLG) after Sheila adjusted it last week. I adjusted the SQZ angle from 16:45 to 16:55UTC and 17:05 to 17:15UTC, this is currently allowed during Observing but tagging DetChar just incase. It's a little confusing that improving SQZ BLRMs decreased the H1 range, see attached. Started at 141deg, ended at 130deg, I think there's room form more improvement and something is off.

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camilla.compton@LIGO.ORG - 09:35, Thursday 15 June 2023 (70482)

Before Tuesday Maintenance (first t-cursor) our SQZ BLRMs and range looked good.

After Tuesday Maintenance and before the SQZ angle change they were not goof, unsure what changed.

Since yesterdays SQZ angle change (2nd t-cursor) the BLRMs are better but are seem like the angle is not perfect as the BLRMs are reaching a minimum and then turning up after a few hours.

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