Reports until 10:19, Tuesday 05 December 2023
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camilla.compton@LIGO.ORG - posted 10:19, Tuesday 05 December 2023 - last comment - 12:31, Tuesday 05 December 2023(74602)
New MICHFF FM8 did not cause a lockloss

This morning we tried Gabriele's new FM8 MICHFF filter with more low frequency gain. It did not cause a lockloss. Not enough time in this configuration to see the effect on DARM, see 74595. We can repeat this during a commissioning period.

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gabriele.vajente@LIGO.ORG - 12:31, Tuesday 05 December 2023 (74609)

In addition to Camilla's trend shown in 74595, we can see that the new MICHFF, despite having a large MICHFF_OUT, does not change the low frequency RMS of the DARM error signal.

This allows us to relax a bit the aggressive roll-off we had in MICHFF fits below 10 Hz.

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