jeffrey.kissel@LIGO.ORG - posted 09:13, Wednesday 14 March 2012 - last comment - 09:24, Wednesday 14 March 2012(2434)
H2 SUS FMY Rubbing Saga
B. Bland, J. Garcia, J. Kissel, T. Sadecki After the ISI shakedown, and lamenting the loss of H2 SUS ITMY, we found that H2 SUS FMY seemed to have survived according to first visual inspections, but OSEM signals / alignment looked pretty bad on the digital side. The last time FMY's TOP to TOP TFs had been measured (see aLOG 2237), it was identified that there was some rubbing, but the source was unclear. After the initial inspection, (and a couple of measurement tries by both Jeff and I), we identified severe badness in these TFs. Travis, yesterday, then worked some magic -- but now, as is evident from an "after" measurement -- we're back to the rubbing that was seen before the ISI badness. Attached are plots showing the story. 2012-01-09 -- Approved post-cartridge, in-air data [[but was taken before EQ stops were adjusted to 0.75 nominal distance]] 2012-02-15 -- At vacuum, first sign of rubbing [[two differences -- in-air vs. in-vacuum, and EQ stop placement]]. 2012-03-13 -- post ISI badness, in-air TF, crazy bad rubbing (later identified to be TOP/M1 vertical blade spring / mass stops that may have rattled down during the Shakedown.) 2012-03-14 -- Post-Travis fix of TOP EQ stops: back to black. The data shows: - Indeed FMY has survived the Shakedown. *phew*! - Because Cyan lines up identically with Black, I surmise that there's no change to whatever mechanic rubbing that was caused by bringing all the EQ stops in to the nominal 0.75 +/- 0.25 mm We've elected (i.e. Landry made the call) to go for close up of doors given this data. So, when we go back in the chamber to restore the repaired, wire suspended, ITMY, we'll attack FMY with more rigor.
Non-image files attached to this report
Comments related to this report
2012-03-13 and 2012-03-14 data shown in the plots were taken with the following DTT .xmls:
${SusSVN}/sus/trunk/BSFM/H2/FMY/SAGM1/Data/
2012-03-13_1342_H2SUSFMY_M1_L_WhiteNoise.xml
2012-03-13_1342_H2SUSFMY_M1_P_WhiteNoise.xml
2012-03-13_1342_H2SUSFMY_M1_R_WhiteNoise.xml
2012-03-13_1342_H2SUSFMY_M1_T_WhiteNoise.xml
2012-03-13_1342_H2SUSFMY_M1_V_WhiteNoise.xml
2012-03-13_1342_H2SUSFMY_M1_Y_WhiteNoise.xml
2012-03-14_1416_H2SUSFMY_M1_L_WhiteNoise.xml
2012-03-14_1416_H2SUSFMY_M1_P_WhiteNoise.xml
2012-03-14_1416_H2SUSFMY_M1_R_WhiteNoise.xml
2012-03-14_1416_H2SUSFMY_M1_T_WhiteNoise.xml
2012-03-14_1416_H2SUSFMY_M1_V_WhiteNoise.xml
2012-03-14_1416_H2SUSFMY_M1_Y_WhiteNoise.xml
Exported as
2012-03-13_1342_H2SUSFMY_M1_L_WhiteNoise_tf.txt
2012-03-13_1342_H2SUSFMY_M1_P_WhiteNoise_tf.txt
2012-03-13_1342_H2SUSFMY_M1_R_WhiteNoise_tf.txt
2012-03-13_1342_H2SUSFMY_M1_T_WhiteNoise_tf.txt
2012-03-13_1342_H2SUSFMY_M1_V_WhiteNoise_tf.txt
2012-03-13_1342_H2SUSFMY_M1_Y_WhiteNoise_tf.txt
2012-03-14_1416_H2SUSFMY_M1_L_WhiteNoise_tf.txt
2012-03-14_1416_H2SUSFMY_M1_P_WhiteNoise_tf.txt
2012-03-14_1416_H2SUSFMY_M1_R_WhiteNoise_tf.txt
2012-03-14_1416_H2SUSFMY_M1_T_WhiteNoise_tf.txt
2012-03-14_1416_H2SUSFMY_M1_V_WhiteNoise_tf.txt
2012-03-14_1416_H2SUSFMY_M1_Y_WhiteNoise_tf.txt
Initially processed by
${SusSVN}/sus/trunk/BSFM/Common/MatlabTools/plotBSFM_dtttfs.m
Which saved the data into the standard .mat file format,
${SusSVN}/sus/trunk/BSFM/H2/FMY/SAGM1/Results/
2012-03-13_1342_H2SUSFMY_M1.mat
2012-03-14_1416_H2SUSFMY_M1.mat
Which were then used to produce the above entry's attachment, using
${SusSVN}/sus/trunk/BSFM/Common/MatlabTools/plotallbsfm_tfs.m