I. The Y arm stayed stable through last night and I have saved the arm lock settings to IFOconfigure.
II. ALS X arm noise measurements
I looked at the before and after noise of ALSX.
Phase tracker gain = 85
Xarm servo gain = -17
The rms in loop noise has dropped from 3KHz to 500 Hz.
Attachment 1: Phase tracker OLTF
Attachment 2: Free running noise and in loop noise
Attachment 3: Out of loop noise (measured with arms locked using PDH for IR)
Attachment 4: ALS arm servo OLTF
xml data files can be found in /users/manasa/data/140430/