Naoki, Camilla

Last Friday 73773 Nov 3 (black trace, IFO locked 6h30), Naoki found the MICH FF had degraded since measured on Oct 27 (pink trace IFO locked 23h). Today we measured the MICH FF using /lsc/h1/scripts/feedforward/MICH_excitation_comparison.xml after the IFO had been locked 3 hours  (yellow trace) and 7 hours (grey trace). See attached.

MICH FF effectiveness improves as the IFO thermalizes (compare yellow to grey) but also seems to be degrading over ~days (compare grey to black). MICH FF last tuned Oct 12 73420.