J. Kissel

After chamber closeout, and subsequent close up, I've gathered a set of TFs for H1 SUS ETMX. I attach the results, all looks quite well, and ready for pump-down! I've left the ISI ETMX undamped with the MASTERSWITCH ON, and H1 SUS ETMX and H1 SUS TMSX are damped.

Of interesting note -- checkout the P to P transfer function comparison between the main chains for H1 ETMX, H1/H2 ETMY, and L1 ETMX, on pg 5 of allquads_2013-12-04_Phase3a_H1SUSETMX_ChamberCloseout_ALL_ZOOMED_TFs.pdf. It appears the 2nd Pitch mode (modeled to be at 1.31 [Hz]), whose motion is the top-three masses pitching in concert, differentially with the test mass, is different from the model, and different between these three examples. The one just measured here, H1 ETMX, seems to have the lowest frequency mode of the three, but all are within 6% of the model (-5.34%, 1.37%, 2.90%, respectively). Definitely not a show stopper, but something to consider when designing high-performance damping filters for this DOF -- the gain bump for this mode will have to be reasonably wide if we wanna use the same filter for every ETM.

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Details:

Data was taken with DTT, using the following templates,
${SusSVN}/sus/trunk/QUAD/H1/ETMX/SAGM0/Data/
2013-12-04_0146_H1SUSETMX_M0_Mono_WhiteNoise_L_0p01to50Hz.xml
2013-12-04_0146_H1SUSETMX_M0_Mono_WhiteNoise_P_0p01to50Hz.xml
2013-12-04_0146_H1SUSETMX_M0_Mono_WhiteNoise_R_0p01to50Hz.xml
2013-12-04_0146_H1SUSETMX_M0_Mono_WhiteNoise_T_0p01to50Hz.xml
2013-12-04_0146_H1SUSETMX_M0_Mono_WhiteNoise_V_0p01to50Hz.xml
2013-12-04_0146_H1SUSETMX_M0_Mono_WhiteNoise_Y_0p01to50Hz.xml

${SusSVN}/sus/trunk/QUAD/H1/ETMX/SAGR0/Data/
2013-12-05_0152_H1SUSETMX_R0_WhiteNoise_L_0p01to50Hz.xml
2013-12-05_0152_H1SUSETMX_R0_WhiteNoise_P_0p01to50Hz.xml
2013-12-05_0152_H1SUSETMX_R0_WhiteNoise_R_0p01to50Hz.xml
2013-12-05_0152_H1SUSETMX_R0_WhiteNoise_T_0p01to50Hz.xml
2013-12-05_0152_H1SUSETMX_R0_WhiteNoise_V_0p01to50Hz.xml
2013-12-05_0152_H1SUSETMX_R0_WhiteNoise_Y_0p01to50Hz.xml

Data was exported, processed, saved, using the usual tools,
${SusSVN}/sus/trunk/QUAD/Common/MatlabTools/
plotquad_dtttfs.m
plotallquad_tfs.m
the latter of which has had its measurement list updated, and is now committed to the repo as with all the above mentioned data and plots.