Reports until 12:42, Friday 19 April 2024
H1 ISC
gabriele.vajente@LIGO.ORG - posted 12:42, Friday 19 April 2024 (77291)
HAM1 FF to CHARD_Y

[Jennie, Jim, Gabriele]

We tried again turning on the HAM1 yaw FF to ASC, like in 77254. This time we wanted to turn on one dof at a time.

We first turend on the CHARD_Y FF since we care mostly about that loop. It worked well and reduced the CHARD_Y noise below 20 Hz.

We then turned on the INP1_Y FF. This imrpvoed slighlty the INP1 dof, but made the CHARD_Y g back to the original noise level.

We did not try the other dofs, since the predicted subtraction had very little effect.

We lft the CHARD_Y FFs on, and all other yaw off. This improves CHARD_Y and maybe also DARM, to be confirmed.

Jim accepted the new values in SDF

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