Andres R, Betsy B, and Jeff B took the transfer function for Phase 1b testing of the HSTS MC1 suspension. This data has been plotted and is ready for review.
To assist with reviewing the MC1 (HSTS) suspension, please find attached below a plot showing a comparison of all HSTS suspensions measured at LHO and LLO, to date (allhstss_2012-07-16_AllHsts_ALL_ZOOMED_TFs.pdf). Note that, these M1-M1 transfer functions were all obtained at Phase 1b of testing. Power spectra have been taken with damping loops both ON and OFF for each stage (2012-07-17_1300_X1SUSMC1_M*_ALL_Spectra.pdf). Power spectra plots, with both damping ON and OFF have been produced, which compare all LHO HSTS measurements for PR2, MC1 and MC2 (allhstss_2012-07-17_ALL_Spectra_Don.pdf and allhstss_2012-07-17_ALL_Spectra_Doff.pdf). Note that, the comparison power spectra provided for MC2 M3 AOSEMs, show an elevated noise floor at high frequencies above 100 Hz. A similar issues has also been observed for suspensions attached to the LLO triple test-stand, which was rectified by going chamber-side. In addition, power spectra for specific degrees of freedom (L, P and Y) can be more conveniently compared across multiple stages (M1, M2 and M3) of the same suspension in the final plots found below (allhstss_2012-07-17_X1SUSMC1_M1M2M3_Spectra_ALL_Don.pdf). All data, results, and scripts I have committed to the sus SVN as of this entry. This ensures all measurements have been taken required to complete Phase 1b testing.
For further reference, I have added power spectra plots comparing LHO MC1, with the LLO MC3 suspension. Results from all three phases for the MC3 suspension are shown as follows:- Blue trace = LLO MC3 Phase 1b (X2SUSMC3 2012−05−01_1600) Green trace = LLO MC3 Phase 2b (L1SUSMC3 2012−06−28_1600) Red trace = LLO MC3 Phase 3a (L1SUSMC3 2012−07−02_1400) Cyan trace = LHO MC1 Phase 1b (X1SUSMC1 2012−07−17_1300)