This morning I started taking the transfer function measurements on HXDS OM2 (T-SAMS) which we have just installed in HAM6 chamber (replacing the old tip tilt - see alog 65004). The results shows that the suspension is healthy and free of any rubbing - please see all the plots attached below.
I have created new directories for the new OM2, the templates are stored at the following locations,
/ligo/svncommon/SusSVN/sus/trunk/HXDS/H1/OM2/SAGM1/Data/
/ligo/svncommon/SusSVN/sus/trunk/HXDS/H1/OM2/SAGM1/Data/2022-09-19_1730_H1SUSOM2_M1_WhiteNoise_L_0p02to50Hz.xml
/ligo/svncommon/SusSVN/sus/trunk/HXDS/H1/OM2/SAGM1/Data/2022-09-19_1730_H1SUSOM2_M1_WhiteNoise_P_0p02to50Hz.xml
/ligo/svncommon/SusSVN/sus/trunk/HXDS/H1/OM2/SAGM1/Data/2022-09-19_1730_H1SUSOM2_M1_WhiteNoise_Y_0p02to50Hz.xml
/ligo/svncommon/SusSVN/sus/trunk/HXDS/H1/OM2/SAGM1/Data/2022-09-19_1800_H1SUSOM2_M1_WhiteNoise_Y_0p01to50Hz_tf.txt
/ligo/svncommon/SusSVN/sus/trunk/HXDS/H1/OM2/SAGM1/Data/2022-09-19_1800_H1SUSOM2_M1_WhiteNoise_P_0p01to50Hz_tf.txt
/ligo/svncommon/SusSVN/sus/trunk/HXDS/H1/OM2/SAGM1/Data/2022-09-19_1800_H1SUSOM2_M1_WhiteNoise_L_0p01to50Hz_tf.txt
and for the .mat file,
/ligo/svncommon/SusSVN/sus/trunk/HXDS/H1/OM2/SAGM1/Results/
I have committed the above files on the svn. I still have to process the results on Matlab file (using plotallhxds_tfs_M1.m file), however I am getting some error - hence will look into it and post the results later on.
Update:-
Jeff Kissel and I looked into the above issue and found that LLO OM2 folder was not 'svn up' due to which Matlab was unable to find LLO .mat file. Also, I had some typo in my Matlab file, which has now been rectified and we are able to get the plots we want - please see the latest plot attached here.
In this plot we are comparing H1-OM2, H1-ZM6 H1-ZM2 (P-SAMs which has a cable attached) and L1-OM2.
H1-OM2 and L1-OM2 plot (cyan and orange trace) ties up pretty well. However you can also see some frequency shift for P and Y dof, which is due to the moment of inertia coming from the bottom mass. The new OM2, even though HXDS species has significant difference in the bottom mass design and weight distribution.
For reference we can also see the plot posted in Jeff. Kissel's alog 62779 (which compares all 6 HXDSes, all 3 dof) and compare against the current OM2 to spot the difference in the frequency shift.
