Suspension and vibration isolation systems of the ground-based laser interferometric gravitational wave detectors

Abstract

To successfully detect the ultrasmall gravitational wave signal ($\sim$$10^{-19}$ m), the ground-based laser interferometric gravitational wave detector should reduce all kinds of noise. This study summarizes the seismic noise that affects gravitational wave detection and the basic principle and method for mitigating the seismic noise. At present, a multistage suspension system and an active vibration isolation system are combined to further reduce seismic noise. We investigate and analyze the application of passive and active vibration isolation methods in ground-based gravitational wave detectors by reviewing the suspension and vibration isolation systems of current gravitational wave detectors, including LIGO, Virgo, KAGRA, and GEO600.