aLIGO LHO Logbook

H1 ISC

camilla.compton@LIGO.ORG - posted 09:29, Monday 30 September 2024 - last comment - 11:32, Thursday 03 October 2024(80369)

PRCL FF measurements taken as FM6 fit didn't reduce PRCL noise.

I tried Elenna's FM6 from 80287, this made the PRCL coupled noise worse, see first attached plot.

Then Ryan turned off CAL lines and we retook to preshaping (PRCLFF_excitation_ETMYpum.xml) and PRCL injection (PRCL_excitation.xml) templates. I took the PRCL_excitation.xml injection with the PRCL FF off and increased amplitude from 0.02 to 0.05 to increase coherence over 50Hz. Exported as prclff_coherence/tf.txt, and prcl_coherence/tf_FFoff.txt. All in /opt/rtcds/userapps/release/lsc/h1/scripts/feedforward

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Comments related to this report

camilla.compton@LIGO.ORG - 13:50, Monday 30 September 2024 (80377)

Link

Elenna pointed out that I tested the wrong filter, the new one is actual FM7, labeled "new0926". We can test that on Thursday.

elenna.capote@LIGO.ORG - 11:32, Thursday 03 October 2024 (80444)

Link

The "correct" filter today in FM7 was tested today and still didn't work. Possibly because I still didn't have the correct pre-shaping applied in this fit. I will refit using the nice measurement Camilla took in this alog.