J. Kissel, T. Shaffer

TJ scanned over the OMs this morning, looking at and adjusting eddy current damping magnets and earthquake stops on all HTTS in HAM6 -- OM1, OM2, OM3, and ZM1. Then, he took the full suite of transfer functions to confirm all where free of rubbing. They're all free of rubbing.

ZM1 still shows a bit of abnormal dynamics in its yaw to yaw DOF (abnormal w.r.t. to all other HTTSs, showing a second resonance in yaw other that the expected primary mode, and the primary mode is a bit lower in frequency than expected), but it will work well enough.

I've processed TJ's results, and they're attached.

Also, I've checked the OSEM centering -- looks good. 

Also, also, checked the high-frequency spectra -- looks good enough. Interestingly (is it really? do we wanna know? do we care enough to fix it?) ZM1 shows much more lines, junk, and ~6-7 kHz humps where the OMs do not. Fil & CDS crew have yet to perform ground loops checks, so they may identify and fix a problem or two that may alleviate this issue.

Regardless, I decree the HAM6 HTTSs are good enough for us to close doors.