-> First lock
841060559 to 841060648 CLEAN DATA
841060802 to 841060863 MICH ampl 5 pole 1 zero 300
841060879 to 841060940 CLEAN DATA
841061168 to 841061229 PRCL ampl 3 pole 0.2 zero 300
841061484 to 841061554 PRCL ampl 0.0004 pole 10 zero 0.01
-> Second lock
841063274 to 841063307 CLEAN DATA
841063378 to 841063409 MICH ampl 5 pole 1 zero 300
841063577 to 841063609 PRCL ampl 3 pole 0.2 zero 300
841063648 to 841063703 PRCL ampl 0.0003 pole 10 zero 0.01
841063817 to 841063850 MICH ampl 0.0005 pole 0.01 zero 100
The attached plot shows the result: noise projections for MICH and PRCL loop into the dark fringe signal.
It‘s clear that we are dominated by MICH noise up to 50 Hz (where there is a strong roll-off in the control filter) and mostly by PRCL noise from 50 Hz to 170 Hz.
The analysis is on-going. More details in the following days.
