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

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Title:	Vibration isolation system with a compact damping system for power recycling mirrors of KAGRA
Authors:	Akiyama, Y.;Akutsu, T.;Ando, M.;Arai, K. et al. (Including Liu, G-C.)
Date:	2019-04-12
Issue Date:	2019-09-17 12:12:23 (UTC+8)
Abstract:	A vibration isolation system called the 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.
Relation:	Classical and Quantum Gravity 36(9), p.095015
DOI:	10.1088/1361-6382/ab0fcb
Appears in Collections:	[Graduate Institute & Department of Physics] Journal Article

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