jeffrey.kissel@LIGO.ORG - posted 18:10, Thursday 18 January 2018 - last comment - 16:27, Monday 12 March 2018(40186)
After Many Moons -- H1 SUS OM1, OM2 and OM3 OSEM Systems are Functional Again
J. Kissel, M. Pirello Marc and I sat down with the mess of wiring diagrams today (see below) in order to verify that all cables had been connected and chassis have been turned on after the several month delay in re-arranging and installing the HAM5/6 suspension electronics due to vent activity. We found a few chassis not turned on, and a few cables in the wrong place, but those problems were easily rectifiable. I've now begun the verification process that all is well with that which are easy: the OM1, OM2, and OM3. I had to flip the sign of the damping loops from -1 to +1 (now captured in the safe.snap SDF file), but now all damping loops are functional. I've confirmed so by taking damped M1 to M1 transfer functions, which look clean and healthy, regardless that HAM6 is still at air and the ISI and HEPI are locked. I attach screenshots of the L to L transfer function, though I took all three DOFs. I'll process them fully in due time (likely once we're closing up HAM6). Next up -- ZM2 and OFI. %% Details %% Drawings used to identify cable names (which have three different naming schemes): For SUS SR3, SRM, and OMC: D1002740-v6 For OM1, OM2, and OM3: First Sheet of D1200666-v11 For ZM1, ZM2, VOPO, and OFI D1700384-v6 For ADC / DAC connections and assignments for all of the above D1002740-v7 Data files: /ligo/svncommon/SusSVN/sus/trunk/HTTS/H1/ OM1/SAGM1/Data/2018-01-19_0101_H1SUSOM1_M1_WhiteNoise_L_0p01to50Hz.xml OM1/SAGM1/Data/2018-01-19_0101_H1SUSOM1_M1_WhiteNoise_P_0p01to50Hz.xml OM1/SAGM1/Data/2018-01-19_0101_H1SUSOM1_M1_WhiteNoise_Y_0p01to50Hz.xml OM2/SAGM1/Data/2018-01-18_0102_H1SUSOM2_M1_WhiteNoise_L_0p01to50Hz.xml OM2/SAGM1/Data/2018-01-18_0102_H1SUSOM2_M1_WhiteNoise_P_0p01to50Hz.xml OM2/SAGM1/Data/2018-01-18_0102_H1SUSOM2_M1_WhiteNoise_Y_0p01to50Hz.xml OM3/SAGM1/Data/2018-01-19_0102_H1SUSOM3_M1_WhiteNoise_L_0p01to50Hz.xml OM3/SAGM1/Data/2018-01-19_0102_H1SUSOM3_M1_WhiteNoise_P_0p01to50Hz.xml OM3/SAGM1/Data/2018-01-19_0102_H1SUSOM3_M1_WhiteNoise_Y_0p01to50Hz.xml
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Processed this data in detail finally. See attached. Note that this data was taken before the sign convention was identified as wrong for all HTTS in LHO aLOG 40847, so the phase does not agree with the model at DC by 180 deg. This has since been fixed, see LHO aLOG 40853 though I haven't yet retaken TFs that demonstrably confirm that all is well. We'll do so once we're closer to closing HAM6. Also note that the individual measurement results have been processed by a revamped /ligo/svncommon/SusSVN/sus/trunk/HTTS/Common/MatlabTools/plotHTTS_dtttfs_M1.m which plots the EUL drive to OSEM response correctly for the first time, and the plotall script, /ligo/svncommon/SusSVN/sus/trunk/HTTS/Common/MatlabTools/plotallhtts_tfs_M1.m respects the phase.
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