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Seismic isolation and suspension systems for Advanced LIGO

Robertson, N. A. and Abbott, B. and Armandula, H. and Barton, M. and Bork, R. and Coyne, D. and Heefner, J. and Jones, L. and Mailand, K. and Romie, J. and Torrie, C. and Willems, P. (2004) Seismic isolation and suspension systems for Advanced LIGO. In: Gravitational Wave and Particle Astrophysics Detectors. Proceedings of SPIE. No.5500. Society of Photo-optical Instrumentation Engineers (SPIE) , Bellingham, WA, pp. 81-91. ISBN 9780819454324.

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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.

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Coyne, D.0000-0002-6427-3222
Additional Information:© 2004 Society of Photo-optical Instrumentation Engineers (SPIE). The authors gratefully acknowledge financial support from the following agencies and universities: National Science Foundation, Particle Physics and Astronomy Research Council, the Max-Planck Society, the Universities of Glasgow, Birmingham and Strathclyde. The work at Stanford University is supported by NSF grant PHY-0140297. The work at the LIGO Laboratories and Observatories is supported by NSF grant PHY-0107417. The work at Louisiana State University is supported by NSF grants PHY-0071316 and PHY-0304924 and Louisiana Board of Regents contract LEQSF(2000-03)-RD-A-06.
Funding AgencyGrant Number
Particle Physics and Astronomy Research Council (PPARC)UNSPECIFIED
Max-Planck SocietyUNSPECIFIED
University of GlasgowUNSPECIFIED
University of BirminghamUNSPECIFIED
University of StrathclydeUNSPECIFIED
Louisiana Board of RegentsLEQSF(2000-03)-RD-A-06
Series Name:Proceedings of SPIE
Issue or Number:5500
Record Number:CaltechAUTHORS:20190221-110524925
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Official Citation:Norna A. Robertson, Benjamin Abbott, R. Abbott, R. Adhikari, Graham S. Allen, Helena Armandula, Stuart Mark Aston, A. Baglino, Mark Barton, B. Bland, Rolf Bork, J. Bogenstahl, Gianpietro Cagnoli, C. Campbell, C. A. Cantley, K. Carter, D. Cook, D. Coyne, David R.M. Crooks, Edward J. Daw, Daniel B. DeBra, E. Elliffe, J. Faludi, Peter Fritschel, A. Ganguli, Joseph A. Giaime, S. Gossler, A. Grant, J. Greenhalgh, M. Hammond, Jonathan Hanson, C. Hardham, Gregory M. Harry, Alistair Heptonstall, Jay Heefner, James Hough, D. Hoyland, Wensheng Hua, L. Jones, R. Jones, Jonathan E. Kern, J. LaCour, Brian T. Lantz, K. Lilienkamp, N. Lockerbie, Harald Lueck, M. MacInnis, K. Mailand, Ken Mason, R. Mittleman, Samir A. Nayfeh, J. Nichol, David J. Ottaway, H. Overmier, M. Perreur-Lloyd, J. Phinney, M. V. Plissi, W. Rankin, D. I. Robertson, J. Romie, Sheila Rowan, R. Scheffler, David H. Shoemaker, P. Sarin, Peter H. Sneddon, Clive C. Speake, O. Spjeld, G. Stapfer, Kenneth A. Strain, C. I. Torrie, G. Traylor, J. van Niekerk, Alberto Vecchio, Shirong Wen, P. Willems, I. Wilmut, Harry Ward, M. Zucker, and Lei Zuo "Seismic isolation and suspension systems for Advanced LIGO", Proc. SPIE 5500, Gravitational Wave and Particle Astrophysics Detectors, (29 September 2004); doi: 10.1117/12.552469
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ID Code:93116
Deposited By: Tony Diaz
Deposited On:25 Feb 2019 23:54
Last Modified:16 Nov 2021 16:55

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