Seismic isolation and suspension systems for advanced LIGO

N. A. Robertson, C. A. Cantley, N. Lockerbie, LIGO Scientific Collaboration

Research output: Chapter in Book/Report/Conference proceedingConference contribution book

25 Citations (Scopus)

Abstract

To meet the overall isolation and alignment requirements for the optics in Advanced LIGO, the planned upgrade to LIGO, the US laser interferometric gravitational wave observatory, we are developing three sub-systems: a hydraulic external pre-isolator for low frequency alignment and control, a two-stage active isolation platform designed to give a factor of ~1000 attenuation at 10 Hz, and a multiple pendulum suspension system that provides passive isolation above a few hertz. The hydraulic stage uses laminar-flow quiet hydraulic actuators with millimeter range, and provides isolation and alignment for the optics payload below 10 Hz, including correction for measured Earth tides and the microseism. This stage supports the in-vacuum two-stage active isolation platform, which reduces vibration using force feedback from inertial sensor signals in six degrees of freedom. The platform provides a quiet, controlled structure to mount the suspension system. This latter system has been developed from the triple pendulum suspension used in GEO 600, the German/UK gravitational wave detector. To meet the more stringent noise levels required in Advanced LIGO, the baseline design for the most sensitive optics calls for a quadruple pendulum, whose final stage consists of a 40 kg sapphire mirror suspended on fused silica ribbons to reduce suspension thermal noise.
LanguageEnglish
Title of host publicationProceedings Volume 5500, Gravitational Wave and Particle Astrophysics Detectors
Place of PublicationBellingham, WA USA
Pages81-91
Number of pages11
DOIs
Publication statusPublished - 29 Sep 2004

Fingerprint

LIGO (observatory)
isolation
pendulums
platforms
alignment
optics
hydraulics
gravitational waves
hydraulic actuators
Earth tides
isolators
thermal noise
laminar flow
payloads
ribbons
observatories
sapphire
degrees of freedom
attenuation
mirrors

Keywords

  • interferometric gravitational wave observatory
  • geo 600 data
  • pendulum suspension system
  • LIGO
  • gravitational waves

Cite this

Robertson, N. A., Cantley, C. A., Lockerbie, N., & LIGO Scientific Collaboration (2004). Seismic isolation and suspension systems for advanced LIGO. In Proceedings Volume 5500, Gravitational Wave and Particle Astrophysics Detectors (pp. 81-91). Bellingham, WA USA. https://doi.org/10.1117/12.552469
Robertson, N. A. ; Cantley, C. A. ; Lockerbie, N. ; LIGO Scientific Collaboration. / Seismic isolation and suspension systems for advanced LIGO. Proceedings Volume 5500, Gravitational Wave and Particle Astrophysics Detectors. Bellingham, WA USA, 2004. pp. 81-91
@inproceedings{2d672c749a8f4bb585b067c388e039e1,
title = "Seismic isolation and suspension systems for advanced LIGO",
abstract = "To meet the overall isolation and alignment requirements for the optics in Advanced LIGO, the planned upgrade to LIGO, the US laser interferometric gravitational wave observatory, we are developing three sub-systems: a hydraulic external pre-isolator for low frequency alignment and control, a two-stage active isolation platform designed to give a factor of ~1000 attenuation at 10 Hz, and a multiple pendulum suspension system that provides passive isolation above a few hertz. The hydraulic stage uses laminar-flow quiet hydraulic actuators with millimeter range, and provides isolation and alignment for the optics payload below 10 Hz, including correction for measured Earth tides and the microseism. This stage supports the in-vacuum two-stage active isolation platform, which reduces vibration using force feedback from inertial sensor signals in six degrees of freedom. The platform provides a quiet, controlled structure to mount the suspension system. This latter system has been developed from the triple pendulum suspension used in GEO 600, the German/UK gravitational wave detector. To meet the more stringent noise levels required in Advanced LIGO, the baseline design for the most sensitive optics calls for a quadruple pendulum, whose final stage consists of a 40 kg sapphire mirror suspended on fused silica ribbons to reduce suspension thermal noise.",
keywords = "interferometric gravitational wave observatory, geo 600 data, pendulum suspension system, LIGO, gravitational waves",
author = "Robertson, {N. A.} and Cantley, {C. A.} and N. Lockerbie and {LIGO Scientific Collaboration}",
note = "Event: SPIE Astronomical Telescopes + Instrumentation, 2004, Glasgow, United Kingdom. This research paper was authored by multiple individuals. Please consult manuscript for full attribution details.",
year = "2004",
month = "9",
day = "29",
doi = "10.1117/12.552469",
language = "English",
pages = "81--91",
booktitle = "Proceedings Volume 5500, Gravitational Wave and Particle Astrophysics Detectors",

}

Robertson, NA, Cantley, CA, Lockerbie, N & LIGO Scientific Collaboration 2004, Seismic isolation and suspension systems for advanced LIGO. in Proceedings Volume 5500, Gravitational Wave and Particle Astrophysics Detectors. Bellingham, WA USA, pp. 81-91. https://doi.org/10.1117/12.552469

Seismic isolation and suspension systems for advanced LIGO. / Robertson, N. A.; Cantley, C. A.; Lockerbie, N.; LIGO Scientific Collaboration.

Proceedings Volume 5500, Gravitational Wave and Particle Astrophysics Detectors. Bellingham, WA USA, 2004. p. 81-91.

Research output: Chapter in Book/Report/Conference proceedingConference contribution book

TY - GEN

T1 - Seismic isolation and suspension systems for advanced LIGO

AU - Robertson, N. A.

AU - Cantley, C. A.

AU - Lockerbie, N.

AU - LIGO Scientific Collaboration

N1 - Event: SPIE Astronomical Telescopes + Instrumentation, 2004, Glasgow, United Kingdom. This research paper was authored by multiple individuals. Please consult manuscript for full attribution details.

PY - 2004/9/29

Y1 - 2004/9/29

N2 - To meet the overall isolation and alignment requirements for the optics in Advanced LIGO, the planned upgrade to LIGO, the US laser interferometric gravitational wave observatory, we are developing three sub-systems: a hydraulic external pre-isolator for low frequency alignment and control, a two-stage active isolation platform designed to give a factor of ~1000 attenuation at 10 Hz, and a multiple pendulum suspension system that provides passive isolation above a few hertz. The hydraulic stage uses laminar-flow quiet hydraulic actuators with millimeter range, and provides isolation and alignment for the optics payload below 10 Hz, including correction for measured Earth tides and the microseism. This stage supports the in-vacuum two-stage active isolation platform, which reduces vibration using force feedback from inertial sensor signals in six degrees of freedom. The platform provides a quiet, controlled structure to mount the suspension system. This latter system has been developed from the triple pendulum suspension used in GEO 600, the German/UK gravitational wave detector. To meet the more stringent noise levels required in Advanced LIGO, the baseline design for the most sensitive optics calls for a quadruple pendulum, whose final stage consists of a 40 kg sapphire mirror suspended on fused silica ribbons to reduce suspension thermal noise.

AB - To meet the overall isolation and alignment requirements for the optics in Advanced LIGO, the planned upgrade to LIGO, the US laser interferometric gravitational wave observatory, we are developing three sub-systems: a hydraulic external pre-isolator for low frequency alignment and control, a two-stage active isolation platform designed to give a factor of ~1000 attenuation at 10 Hz, and a multiple pendulum suspension system that provides passive isolation above a few hertz. The hydraulic stage uses laminar-flow quiet hydraulic actuators with millimeter range, and provides isolation and alignment for the optics payload below 10 Hz, including correction for measured Earth tides and the microseism. This stage supports the in-vacuum two-stage active isolation platform, which reduces vibration using force feedback from inertial sensor signals in six degrees of freedom. The platform provides a quiet, controlled structure to mount the suspension system. This latter system has been developed from the triple pendulum suspension used in GEO 600, the German/UK gravitational wave detector. To meet the more stringent noise levels required in Advanced LIGO, the baseline design for the most sensitive optics calls for a quadruple pendulum, whose final stage consists of a 40 kg sapphire mirror suspended on fused silica ribbons to reduce suspension thermal noise.

KW - interferometric gravitational wave observatory

KW - geo 600 data

KW - pendulum suspension system

KW - LIGO

KW - gravitational waves

U2 - 10.1117/12.552469

DO - 10.1117/12.552469

M3 - Conference contribution book

SP - 81

EP - 91

BT - Proceedings Volume 5500, Gravitational Wave and Particle Astrophysics Detectors

CY - Bellingham, WA USA

ER -

Robertson NA, Cantley CA, Lockerbie N, LIGO Scientific Collaboration. Seismic isolation and suspension systems for advanced LIGO. In Proceedings Volume 5500, Gravitational Wave and Particle Astrophysics Detectors. Bellingham, WA USA. 2004. p. 81-91 https://doi.org/10.1117/12.552469