Vibration isolation system with a compact damping system for power recycling mirrors of KAGRA

Abstract

A vibration isolation system called Type-Bp system used for power recycling mirrors has been developed for KAGRA, the interferometric gravitational-wave observatory in Japan. A suspension of the Type-Bp system passively isolates an optic from seismic vibration using three main pendulum stages equipped with two vertical vibration isolation systems. A compact reaction mass around each of the main stages allows for achieving sufficient damping performance with a simple feedback as well as vibration isolation ratio. Three Type-Bp systems were installed in KAGRA, and were proved to satisfy the requirements on the damping performance, and also on estimated residual displacement of the optics.

References in corpus (6)

• Observation of Gravitational Waves from a Binary Black Hole Merger
• GW170817: Observation of Gravitational Waves from a Binary Neutron Star Inspiral
• Construction of KAGRA: an Underground Gravitational Wave Observatory
• Sensors and Actuators for the Advanced LIGO Mirror Suspensions
• Polarization test of gravitational waves from compact binary coalescences
• Mirror actuation design for the interferometer control of the KAGRA gravitational wave telescope

Cited by in corpus (6)

• Performance of the KAGRA detector during the first joint observation with GEO 600 (O3GK)
• An arm length stabilization system for KAGRA and future gravitational-wave detectors
• Dark Matter Signals on a Laser Interferometer
• Optimal Sensor Fusion Method for Active Vibration Isolation Systems in Ground-Based Gravitational-Wave Detectors
• Compact integrated optical sensors and electromagnetic actuators for vibration isolation systems in the gravitational-wave detector KAGRA
• Investigation of crackling noise in the vibration isolation systems of the KAGRA gravitational wave detector