Prior to closing-out the BSC9 chamber and after unlocking the TMSX (TMTS) suspension yesterday, a full set of Matlab TFs were run overnight as follows:- 

- TMSX M1-M1 undamped (2014-07-29_1090716348_H1SUSTMSX_M1_ALL_TFs.pdf)

BSC9 ISI Status: ISI locked.

TMSX alignment: No offset was applied during this measurement.

Undamped measurements from above, have been compared with previous 'good' references taken during Phase 3 of testing (alltmtss_2014-07-30_Phase3a_H1TMSX_M1_Doff_ALL_ZOOMED_TFs.pdf). The plot key is:-

Blue Trace = Model Prediction (tmtsopt_production)
Orange Trace = H1 TMSX M1 (2013−12−05_1070337667), Phase 3a (free-air). 
Black Trace = H1 TMSX M1 (2014−05−09_1083659254), Phase 3b (in-vacuum).
Magenta Trace = H1 TMSX M1 (2014−07−29_1090716348), Phase 3b (free-air).

Summary:

All DOFs, but for T, are consistent with previous measurements. However, the second T mode at ~1.4 Hz shows signs of splitting. This is most likely as a consequence of alignment work being carried out also affecting the stiffness of the cable routing, as we have experienced at LLO (see LLO aLOG entry 11656).

Keita has been informed and has some concerns regarding free-swinging spectra, and will need to investigate further.

A damped TF was taken for the T DOF to check the performance of damping loops on the split mode feature (see TMSX_T_DOF_Damped.png below).

All data, scripts and plots have been committed to the sus svn as of this entry.