NOISE PERFORMANCE OF A 72 m SUSPENDED FABRY-PEROT CAVITY

J.C. Dumas; Li Ju; Pablo Barriga; C.N. Zhao; A.A. Woolley; David Blair

doi:10.1142/S0218271811020184

NOISE PERFORMANCE OF A 72 m SUSPENDED FABRY-PEROT CAVITY

J.C. Dumas, Li Ju, Pablo Barriga, C.N. Zhao, A.A. Woolley, David Blair

Research output: Chapter in Book/Conference paper › Other chapter contribution

Abstract

We report on a seismic isolator with a relatively compact 3 m stack, combining new passive isolation techniques. It consists of three cascaded passive 3D isolator stages suspended from an Ultra Low Frequency (ULF) horizontal Robert linkage stage which itself is suspended from a ULF 3D pre-isolator. The 3D isolators use self-damping pendulums and Euler springs for the horizontal and vertical stages respectively, while the 3D pre-isolator is the combination of an inverse pendulum which provides low frequency horizontal pre-isolation, and a LaCoste linkage for low frequency vertical pre-isolation. Two isolators suspending mirror test masses have been built to form a 72 m optical cavity in order to test their performance. We report results which demonstrate residual motion at nanometer level at frequencies above 1 Hz.

Original language	English
Title of host publication	INTERNATIONAL JOURNAL OF MODERN PHYSICS D
Place of Publication	SINGAPORE
Pages	2063-2067
DOIs	https://doi.org/10.1142/S0218271811020184
Publication status	Published - 2011

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title = "NOISE PERFORMANCE OF A 72 m SUSPENDED FABRY-PEROT CAVITY",

abstract = "We report on a seismic isolator with a relatively compact 3 m stack, combining new passive isolation techniques. It consists of three cascaded passive 3D isolator stages suspended from an Ultra Low Frequency (ULF) horizontal Robert linkage stage which itself is suspended from a ULF 3D pre-isolator. The 3D isolators use self-damping pendulums and Euler springs for the horizontal and vertical stages respectively, while the 3D pre-isolator is the combination of an inverse pendulum which provides low frequency horizontal pre-isolation, and a LaCoste linkage for low frequency vertical pre-isolation. Two isolators suspending mirror test masses have been built to form a 72 m optical cavity in order to test their performance. We report results which demonstrate residual motion at nanometer level at frequencies above 1 Hz.",

author = "J.C. Dumas and Li Ju and Pablo Barriga and C.N. Zhao and A.A. Woolley and David Blair",

year = "2011",

doi = "10.1142/S0218271811020184",

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pages = "2063--2067",

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T1 - NOISE PERFORMANCE OF A 72 m SUSPENDED FABRY-PEROT CAVITY

AU - Dumas, J.C.

AU - Ju, Li

AU - Barriga, Pablo

AU - Zhao, C.N.

AU - Woolley, A.A.

AU - Blair, David

PY - 2011

Y1 - 2011

N2 - We report on a seismic isolator with a relatively compact 3 m stack, combining new passive isolation techniques. It consists of three cascaded passive 3D isolator stages suspended from an Ultra Low Frequency (ULF) horizontal Robert linkage stage which itself is suspended from a ULF 3D pre-isolator. The 3D isolators use self-damping pendulums and Euler springs for the horizontal and vertical stages respectively, while the 3D pre-isolator is the combination of an inverse pendulum which provides low frequency horizontal pre-isolation, and a LaCoste linkage for low frequency vertical pre-isolation. Two isolators suspending mirror test masses have been built to form a 72 m optical cavity in order to test their performance. We report results which demonstrate residual motion at nanometer level at frequencies above 1 Hz.

AB - We report on a seismic isolator with a relatively compact 3 m stack, combining new passive isolation techniques. It consists of three cascaded passive 3D isolator stages suspended from an Ultra Low Frequency (ULF) horizontal Robert linkage stage which itself is suspended from a ULF 3D pre-isolator. The 3D isolators use self-damping pendulums and Euler springs for the horizontal and vertical stages respectively, while the 3D pre-isolator is the combination of an inverse pendulum which provides low frequency horizontal pre-isolation, and a LaCoste linkage for low frequency vertical pre-isolation. Two isolators suspending mirror test masses have been built to form a 72 m optical cavity in order to test their performance. We report results which demonstrate residual motion at nanometer level at frequencies above 1 Hz.

U2 - 10.1142/S0218271811020184

DO - 10.1142/S0218271811020184

M3 - Other chapter contribution

SN - 02182718

SP - 2063

EP - 2067

BT - INTERNATIONAL JOURNAL OF MODERN PHYSICS D

CY - SINGAPORE

ER -