Phase 3b spectra have been measured on the beamsplitter after Jeff Kissel implemented the new filters.
The attached pdf are showing a comparison between spectra taken in March 26th phase 3a (in blue), and May 17th phase 3b (in green) with the suspension damped (first pdf) and undamped (second one). The ISI was damped.
Data, measurement lists and figures have been commited on the svn
Attached are spectra from the beamsplitter under vacuum (phase 3b) comparing damped and undamped spectra for M1 and M2. Damping looks to be working fine for all dof, except in yaw, where it increases the motion (page 12 of first pdf and page 7 of second pdf). Those spectra have been taken with a gain of -2 in L and P (as it has been used during HIFO-Y) and -1 for the other dofs
Attached is a performance spectra of the beamsplitter, plotted with osem sensor noise. The spectra compares H1 BS in chamber, in air, with no ISI isolation, suspension damped, and L1 BS in vacuum with ISI and suspension damped.