A 6D interferometric inertial isolation system

Understand

We present a novel inertial-isolation scheme based on six degree-of-freedom (6D) interferometric sensing of a single reference mass.

• It is capable of reducing inertial motion by more than two orders of magnitude at 100\,mHz compared with what is achievable with state-of-the-art seismometers.
• This will enable substantial improvements in the low-frequency sensitivity of gravitational-wave detectors.
• The scheme is inherently two-stage, the reference mass is softly suspended within the platform to be isolated, which is itself suspended from the ground.