[Yuhang, Eleonora]

Today we temporarily swiched off both the rotary and turbo pump in the central area (close to BS).

The attached plot show the comparison of the spectra of the suspensions in the central area, with pumps on and off.

We see that BS is strongly affected by the pumps vibration while PR and INPUT seem not.

[Note that at the time when I developed local control for the first time, the pump where swiched off].

The pumps have been switched off for about 3 hours ( from 5PM to 8PM).