Reports until 12:25, Monday 30 September 2024
H1 SQZ
camilla.compton@LIGO.ORG - posted 12:25, Monday 30 September 2024 (80373)
AS42 sensing matrix re-measured

Sheila, Camilla

As Naoki/Vicky started, I moved ZM4,6,5 -50urad and then +50urad and recorded change in AS_A/B_AS42_PIT/YAW. It may have been easier if I'd changed AS_A/B AS42 offsets to have PIT/YAW outputs zero'ed to start with...  

Plot attached of ZM4, ZM5 and ZM6. 

There is a some cross coupling, and ZM5 gave very strange results in pitch and yaw with overshoot and the same direction of AS42 recorded with a different direction of alignment. This suggests we should use ZM4 and ZM6 as we do for our SCAN_SQZ_ALIGNMENT script.

Sensing/Input matrices calculated using /sqz/h1/scripts/ASC/AS42_sensing_matrix_cal.py

Using ZM4 and ZM6.
PIT Sensing Matrix is:
[[-0.0048 -0.0118]
 [ 0.0071  0.0016]]
PIT Input Matrix is:
[[ 21.02496715 155.05913272]
 [-93.29829172 -63.07490145]]
YAW Sensing Matrix is:
[[-0.00085 -0.009  ]
 [ 0.0059   0.0029 ]]
YAW Input Matrix is:
[[  57.2726375   177.74266811]
 [-116.52019354  -16.78680754]]

Images attached to this report