Marc and Yuhang
Marc provided us a code written by Julia Casanueva Diaz, which was used by Marc to do FIS auto alignment for Virgo.
After reading this code together, I found out what can be improved for the construction of driving matrix. Especially, I finally understand what is the meaning of matrix of inversion. The idea is the change of basis after inversion. With this in mind, we checked again the sensing matrix and inverted it. We got following driving matrix
|
|
Pitch |
Yaw |
||
|
|
WFS1 |
WFS2 |
WFS1 |
WFS2 |
|
Input mirror |
7.37 |
-4.98 |
-1.71 |
1.65 |
|
End mirror |
6.64 |
9.69 |
-1.65 |
-4.41 |
With this driving matrix, we did preliminary check of Input and End mirror pitch/yaw reconstructed spectrum. Compared with the old measurement (elog2263, elog2245), it seems the reconstruction is more reasonable (attached figure).
More investigation and optimization will be done soon.
