aLIGO LHO Logbook

H1 ISC

elenna.capote@LIGO.ORG - posted 16:33, Thursday 26 May 2022 - last comment - 12:43, Friday 27 May 2022(63363)

DARM Back on ETMX Coil Drivers

(on behalf of Sheila)

Sheila switched the darm actuator back to ETMX coil drivers. To avoid instability, she turned off the L2A decoupling on the PUM. This seems to have done the trick! ASC is stable and we are still at NLN.

Comments related to this report

sheila.dwyer@LIGO.ORG - 09:22, Friday 27 May 2022 (63370)

Link

I attempted to do this manually again this morning but made a mistake which unlocked the IFO. I've now set the guardian to use ETMX, and accepted in SDF that the ETMX PUM L2P and L2Y filters are off.

Images attached to this comment

jeffrey.kissel@LIGO.ORG - 12:43, Friday 27 May 2022 (63375)CAL

Link

Tagging CAL.
With this breakthrough, it indicates that we've switched back to "All ETMX" DARM actuator.