Nergis, Evan
The ETMX oplev was badly miscentered in yaw. We have recentered it.
We did not make any changes to the whitening board settings. A picture is attached.
Sheila, Evan
We have now engaged the ETMX L2 pitch oplev damping with the following filter settings:
zpk([0],[50],10,"n")
ellip("LowPass",4,2,40,15)
An OLTF of the damping loop is attached.
Qualitatively, this loop appears to make the buildup of ALS-X light more stable during locking activities.