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Reports until 12:27, Thursday 13 June 2024
H1 ISC
jennifer.wright@LIGO.ORG - posted 12:27, Thursday 13 June 2024 (78415)
Retuned SRM position and SRC1 offsets to increase coupled cavity pole

Jennie W, Keita, Sheila

Sheila suggested we move SRM to increase the coupled cavity pole as this got worse in the previous week.

Keita and I opened the SRC1_P and SRC1_Y loops (and turned off the offsets) then walked SRM in yaw and looked at the coupled cavity pole.

See image of the loop medm screen.

Its hard to see but moving down in SRM yaw on the sliders made the f_cc higher. We stopped due to the end of the commissioning period so maybe we could do more optimisation of this.

See the attached trend.

I set the offsets in the two loops to cancel out the INMON values at this new alignment, before closing them again.

These offsets have been changed in lscparams.py on lines 551 and 552 and accepted in OBSERVE.snap by TJ.

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