J. Kissel

I've taken an over-night (un-driven) ASD of the recently aligned L2/PUM OSEMs on the newly freely suspended H1 SUS ITMX, on the hunt for its new highest Bounce and Roll (a.k.a. the V4 and R4) modes. Attached are the results, which clearly show these modes, and they're well resolved in frequency with high SNR. The following are these frequencies in tabular form:
     
    Former values (Hz)       New Values (Hz)
V4     9.8469                        9.8022
R4    13.978                        13.927

We'll use these new frequencies to tune up the Bounce & Roll mode dampers that are to be installed in a bit.