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Global feed-forward vibration isolation in a km scale interferometer

DeRosa, Ryan and Driggers, Jennifer C. and Atkinson, Dani and Miao, Haixing and Frolov, Valery and Landry, Michael and Giaime, Joseph A. and Adhikari, Rana X. (2012) Global feed-forward vibration isolation in a km scale interferometer. Classical and Quantum Gravity, 29 (21). Art. No. 215008. ISSN 0264-9381. doi:10.1088/0264-9381/29/21/215008.

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Using a network of seismometers and sets of optimal filters, we implemented a feed-forward control technique to minimize the seismic contribution to multiple interferometric degrees of freedom of the Laser Interferometer Gravitational-wave Observatory interferometers. The filters are constructed by using the Levinson–Durbin recursion relation to approximate the optimal Wiener filter. By reducing the RMS of the interferometer feedback signals below ~10 Hz, we have improved the stability and duty cycle of the joint network of gravitational wave detectors. By suppressing the large control forces and mirror motions, we have dramatically reduced the rate of non-Gaussian transients in the gravitational wave signal stream.

Item Type:Article
Related URLs:
URLURL TypeDescription Paper
Atkinson, Dani0000-0001-8589-1938
Miao, Haixing0000-0003-2879-5821
Adhikari, Rana X.0000-0002-5731-5076
Additional Information:© 2012 Institute of Physics Publishing Ltd. Received 7 June 2012, in final form 28 August 2012. Published 1 October 2012. We are supported by NSF grant PHY-0905184. JCD also acknowledges the support of an NSF Graduate Research Fellowship. LIGO was constructed by the California Institute of Technology and Massachusetts Institute of Technology with funding from the National Science Foundation and operates under cooperative agreement PHY- 0757058. This article has LIGO Document Number P1000088.
Funding AgencyGrant Number
NSF Graduate Research FellowshipUNSPECIFIED
Subject Keywords:Instrumentation and measurement; Gravitation and cosmology; Astrophysics and astroparticles
Other Numbering System:
Other Numbering System NameOther Numbering System ID
LIGO Document NumberP1000088
Issue or Number:21
Classification Code:PACS: 04.80.Nn, 07.05.Dz, 07.10.Fq, 07.60.Ly, 95.55.Ym; MSC: 83C35, 86A15
Record Number:CaltechAUTHORS:20121204-092111327
Persistent URL:
Official Citation:Global feed-forward vibration isolation in a km scale interferometer Ryan DeRosa et al 2012 Class. Quantum Grav. 29 215008
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:35781
Deposited By: Ruth Sustaita
Deposited On:04 Dec 2012 17:47
Last Modified:09 Nov 2021 23:17

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