Stuart (LLO), Rahul

Last week Lee McCuller (MIT) asked me to take transfer function measurements on both FC1 and FC2 for all three stages i.e SAGM1, SAGM2, SAGM3 with damping loops ON and OFF.

DTT screenshots attached below are the results for HSTS FC2 for SAGM1, SAGM2, SAGM3 with damping loops ON. I am still processing these results in Matlab and will post detailed plots in the next few days.

The templates for SAGM2 and SAGM3 were copied over from LLO. I had to tweak the excitation amplitudes to get the coherence high (although I am not too happy with few of them - for M2 and M3 stage, so will discuss it with Stuart and take a second round of measurements if required). The latest templates are stored at the following locations,

/ligo/svncommon/SusSVN/sus/trunk/HSTS/H1/FC2/SAGM1/Data

2022-12-14_1900_H1SUSFC2_M1_WhiteNoise_L_0p01to50Hz.xml
2022-12-14_1900_H1SUSFC2_M1_WhiteNoise_P_0p01to50Hz.xml
2022-12-14_1900_H1SUSFC2_M1_WhiteNoise_R_0p01to50Hz.xml
2022-12-14_1900_H1SUSFC2_M1_WhiteNoise_T_0p01to50Hz.xml
2022-12-14_1900_H1SUSFC2_M1_WhiteNoise_V_0p01to50Hz.xml
2022-12-14_1900_H1SUSFC2_M1_WhiteNoise_Y_0p01to50Hz.xml

/ligo/svncommon/SusSVN/sus/trunk/HSTS/H1/FC2/SAGM2/Data

2022-12-14_1700_H1SUSFC2_M2_WhiteNoise_L_0p01to50Hz.xml
2022-12-14_1700_H1SUSFC2_M2_WhiteNoise_P_0p01to50Hz.xml
2022-12-14_1700_H1SUSFC2_M2_WhiteNoise_Y_0p01to50Hz.xml

/ligo/svncommon/SusSVN/sus/trunk/HSTS/H1/FC2/SAGM3/Data

2022-12-14_1800_H1SUSFC2_M3_WhiteNoise_L_0p01to50Hz.xml
2022-12-14_1800_H1SUSFC2_M3_WhiteNoise_P_0p01to50Hz.xml
2022-12-14_1800_H1SUSFC2_M3_WhiteNoise_Y_0p01to50Hz.xml