- ALS X/Y arm stability was checked by IR locked arms.
- Basically the stability looks same as before.
Q sez: here are some ALS ASDs (in Hz/rtHz).
The reference plots are with the arms locked on CARM/DARM with ALS. The main traces are with the arms locked on POX/POY. Alignment affects these traces a fair amount.
The X arm ALS seems no worse for the upgrade, and the PZT actuators do look pretty orthogonal when we play around with the alignment.