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Reports until 16:53, Monday 22 September 2025
H1 ISC (SUS)
elenna.capote@LIGO.ORG - posted 16:53, Monday 22 September 2025 (87074)
Added roll mode bandstop to ETMY M0 damping

I added bandstop filters to the ETMY top mass damping into FM4 of each degree of freedom. We're trying to prevent the driving of the ETMY roll mode. We have increased the attenuation of the ISC signal on L2, reported here. All ISC signal that makes it to M0 gets filtered through L2. Local damping does not see any bandstop on the top until now.

SDFed in safe and observe.

There was some issue with diag_main with these new filters, adding other SDFs related to resolving that issue.

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Displaying report 1-1 of 1.