JeffreyK, DarkhanT,

Summary

After taking another set of DARM OLG TF and PCALY to DARM TF measurements on Jan 7, 2016 (see LHO alog 24756) we compared the DARM actuation, sensing and OLG TF measurements against their models (the most recent similar analysis report was posted in LHO alog 24569).

As in the previous similar analysis we see that residuals of the actuation, the sensing and the OLG TF measurements vs. κ_C and κ_tst corrected DARM model are smaller compared to residuals against not-kappa-corrected DARM model.

This time we also produced residuals against the full kappa corrected DARM models (κ_pu, κ_tst, κ_C and f_c). Sensing function residuals at higher frequencies and actuation function residualsat frequencies close to UGF,as we exptected, became smaller (closer to 1.0).

Details

We produced a comparison plots of DARM OLG TF and PCALY to DARM TF measurements taken during O1. For each of the TF measurements we also took "kappas" (DARM temporal variations) calculated from calibration lines close to times of the TF measurements.

For measurements taken on Jan 7, 2016 the kappa values used in the analysis are 30 minute average values (starting at GPS 1136215829) recorded about two hours before the TF measurements in H1_HOFT_C00 frames. Values were taken only at times when 0:HOFT_OK_BIT in online H1:GDS-CALIB_STATE_VECTOR was set.

par.kappa_tst = 1.059039;
par.kappa_pu = 1.019854;
par.kappa_A = 1.041371;
par.kappa_C = 1.002553;
par.fc = 335.351749; % [Hz]

Coherence of DARM OLG TF measurements at frequencies below crossover, ~30 Hz, is above 0.98, but an accuary of the DARM acutation function model at these frequencies is not very good, it can be seen on the DARM OLG TF measurement vs. all-kappa-corrected model residuals plot (page 9 of the attachment).

The parameter files for these measurements were committed to CalSVN at

CalSVN/aligocalibration/trunk/Runs/PostO1/H1/Scripts/DARMOLGTFs/H1DARMparams_1136225488.m
CalSVN/aligocalibration/trunk/Runs/PostO1/H1/Scripts/DARMOLGTFs/H1DARMparams_1136225488_kappa_corr.m
CalSVN/aligocalibration/trunk/Runs/PostO1/H1/Scripts/DARMOLGTFs/H1DARMparams_1136225488_kappa_corr_full.m

The comparison script and plots were committed to SVN at

CalSVN/aligocalibration/trunk/Runs/PostO1/H1/Scripts/DARMOLGTFs/CompareDARMOLGTFs_O1andPostO1.m
CalSVN/aligocalibration/trunk/Runs/PostO1/H1/Scripts/DARMOLGTFs/CompareDARMOLGTFs_O1andPostO1_full.m
CalSVN/aligocalibration/trunk/Runs/PostO1/H1/Results/DARMOLGTFs/2016-01-07_CompareDARMOLGTFs_O1andPostO1.pdf