[Travis Arnaud] This is a late alog from Friday

On friday afternoon,  B&K measurements on the cage structure of ETMY and TMSY were completed in chamber, with the ISI locked. For each suspensions, two degrees of freedom have been tested, in the horizontal plane, labelled as X and Y (respectively axis perpendicular to the arm and along the arm, see pictures).

TMSY Results (2014-03-21_Phase3a_H1ETMY.pdf)

* Clean data showing the resonnances in the Y direction @ 111Hz, 179Hz and 279Hz and in the X direction @ 163 Hz, 200Hz, 261Hz and 293Hz. No concerns here since there is there is no high Q resonnances below 150Hz. Data is compared with LLO TMSX

ETMY Results (2014-03-21_Phase3a_H1ETMY.pdf)

* Main resonnances at 72Hz (in the Y direction) and 76Hz (in the X direction) look well damped, with a similar Q than the other quad structures etmx and itmx previously tested.

[Method]

For this measurement we used the B&K hammer and tri-axis accelerometer setup, acquiring data with the Pulse software on the windows laptop. The template used has been copied fom T1000697.

Data collected lives under the svn in

/ligo/svncommon/SusSVN/sus/trunk/QUAD/H1/ETMY/BandK

/ligo/svncommon/SusSVN/sus/trunk/TMTS/H1/TMSY/BandK

The accelerometer was mounted on the structures as described on the pictures, with detailled axis orientation.