NaokiAritomi - 02:26, Wednesday 12 August 2020 (2162)
WFS1 pitch and yaw rotation matrix
[Aritomi, Yuhang]
Today we found WFS1 optimal demodulation phase changed again. The optimal demodulation phase for WFS1 is changed from 107.5deg to 127.5deg.
We tried to decouple pitch and yaw in WFS1 I by changing the rotation matrix of pitch and yaw in WFS1 (elog2149). When the rotation angle is 20deg, 11Hz BS pitch peak in WFS1_I_YAW minimized.
Then we injected a 12Hz line to INPUT/END PIT/YAW and measured sensing matrix again (previous measurement). Although 11Hz BS pitch peak and 12Hz INPUT PIT peak are decoupled in WFS1, coupling in WFS1 for INPUT YAW and END PIT got worse and coupling in WFS1 for END YAW is still bad.
| INPUT PIT | INPUT YAW | END PIT | END YAW | |
| WFS1_I_PIT | 0.32 | 0.16 | 0.03 | 0.08 |
| WFS1_I_YAW | 0.02 | 0.24 | 0.07 | 0.08 |
| WFS2_I_PIT | 0.14 | 0.03 | 0.42 | 0.06 |
| WFS2_I_YAW | 0.01 | 0.14 | 0.02 | 0.29 |
Images attached to this report
