Reports until 17:18, Wednesday 03 January 2018
H1 SUS (OpsInfo)
jeffrey.kissel@LIGO.ORG - posted 17:18, Wednesday 03 January 2018 - last comment - 15:01, Thursday 04 January 2018(39975)
H1 SUS HAM2/HAM3 IO and PR Optics are Free of Rubbing at ~1e-6 Torr 
J. Kissel

I've taken standard rubbing-check, top-mass to top-mass transfer functions for all suspensions in HAM2 and HAM3, now that we're down to about 1e-6 Torr (which is sufficient a vacuum that the suspension positions won't change further from buoyancy). Good news: All suspensions are free of rubbing after pumpdown, including MC1, MC2, MC3, IM1-4, PRM, PR2, and PR3.

Data files are listed below. Detailed results will be processed and posted in due time.
    /ligo/svncommon/SusSVN/sus/trunk/HSTS/H1/MC?/SAGM1/Data/2018-01-03*.xml
    /ligo/svncommon/SusSVN/sus/trunk/HSTS/H1/PR?/SAGM1/Data/2018-01-03*.xml

    /ligo/svncommon/SusSVN/sus/trunk/HLTS/H1/PR3/SAGM1/Data/2018-01-03*.xml

    /ligo/svncommon/SusSVN/sus/trunk/HAUX/H1/IM?/SAGM1/Data/2018-01-04*.xml

As a teaser / proof, I attach screenshots of each M1 Pitch to M1 Pitch transfer functions for the Triples.
Images attached to this report
Comments related to this report
jeffrey.kissel@LIGO.ORG - 10:27, Thursday 04 January 2018 (39982)
Link 

Detail results for IM1, IM2, IM3, and IM4, plus the collection are attached. This detailed analysis confirms that they're free of rubbing.
Non-image files attached to this comment
jeffrey.kissel@LIGO.ORG - 15:01, Thursday 04 January 2018 (39995)
Link 

Detailed results for PR3. Note that these latest transfer functions were taken *after* the repaired T3 LF RT SD Top mass coil driver has been re-installed (See LHO aLOG 39946). 

Everything looks good. 

This should be enough evidence to close out FRS Ticket 9497.

The only that catches one's eye are the apparent extra L resonances in the Yaw to Yaw transfer function. We've seen such features before, and we usually attribute it to the benign effect of poor common mode subtraction in the LF and RT OSEMs. In other words, Yaw is a differential measurement of the horizontal rotation about the vertical center of mass, and it has been polluted by the common mode horizontal measurement which contains Longitudinal. If (a) the sensors / flags are laterally misaligned, (b) the sensor gains are not well matched, or (c) the suspension rotates about an axis that is misaligned with the cage location of the OSEMs, then you would see such an effect as we see. I'd say all are plausible, and again all are benign.
Non-image files attached to this comment