Modeling and experiment of the suspended seismometer concept for attenuating the contribution of tilt motion in horizontal measurements.
Fabrice Matichard,Matthew Evans,R. Mittleman,M. MacInnis,Sebastien Biscans,Sebastien Biscans,K. L. Dooley,H. Sohier,A. Lauriero,H. Paris,J. Koch,P. Knothe,A. Carbajo,C. Dufort +13 more
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Modeling and simulations show that a mechanical suspension to isolate the inertial sensor from input tilt can be used to adequately attenuate the tilt transmitted to the instrument, while maintaining translation sensitivity in the frequency band of interest.Abstract:
Tilt-horizontal coupling in inertial sensors limits the performance of active isolation systems such as those used in gravitational wave detectors. Inertial rotation sensors can be used to subtract the tilt component from the signal produced by horizontal inertial sensors, but such techniques are often limited by the sensor noise of the tilt measurement. A different approach is to mechanically filter the tilt transmitted to the horizontal inertial sensor, as discussed in this article. This technique does not require an auxiliary rotation sensor and can produce a lower noise measurement. The concept investigated uses a mechanical suspension to isolate the inertial sensor from input tilt. Modeling and simulations show that such a configuration can be used to adequately attenuate the tilt transmitted to the instrument, while maintaining translation sensitivity in the frequency band of interest. The analysis is supported by experimental results showing that this approach is a viable solution to overcome the tilt problem in the field of active inertial isolation.read more
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Journal ArticleDOI
Seismic isolation of Advanced LIGO: Review of strategy, instrumentation and performance
Fabrice Matichard,B. Lantz,R. Mittleman,K. Mason,J. S. Kissel,J. McIver,B. P. Abbott,R. Abbott,S. Abbott,E. Allwine,S. Barnum,J. Birch,Sebastien Biscans,C. Celerier,D. Clark,D. C. Coyne,D.B. DeBra,R. T. DeRosa,Matthew Evans,S. Foley,Peter Fritschel,Joseph A. Giaime,C. Gray,G. Grabeel,J. Hanson,C. Hardham,M. Hillard,W. Hua,C. Kucharczyk,M. Landry,A. Le Roux,V. Lhuillier,D. M. Macleod,M. MacInnis,R. Mitchell,B. O Reilly,David J. Ottaway,H. R. Paris,A. Pele,M. Puma,H. Radkins,C. R. Ramet,M. Robinson,L. Ruet,P. Sarin,D. H. Shoemaker,A. J. Stein,Johannes Thomas,M. Vargas,K. Venkateswara,J. Warner,S. Wen +51 more
TL;DR: In this paper, the authors present the seismic isolation instrumentation and strategy developed for Advanced LIGO interferometers and present the performance recently achieved with the Advanced LigO observatory.
Journal ArticleDOI
Prospects for detecting gravitational waves at 5 Hz with ground-based detectors
Hang Yu,Denis Martynov,Salvatore Vitale,Matthew Evans,David H. Shoemaker,B. Barr,G. D. Hammond,Stefan Hild,J. H. Hough,S. H. Huttner,Sheila Rowan,B. Sorazu,Ludovico Carbone,Andreas Freise,C. M. Mow-Lowry,K. L. Dooley,Paul Fulda,Hartmut Grote,D. Sigg +18 more
TL;DR: An upgrade to Advanced LIGO (aLIGO) is proposed that focuses on improving the sensitivity in the 5-30 Hz low-frequency band, and the upgrade's astrophysical applications are explored and a comprehensive study of the detector's technical noises is presented.
Journal ArticleDOI
Subtracting Tilt from a Horizontal Seismometer Using a Ground‐Rotation Sensor
K. Venkateswara,C. A. Hagedorn,Jens H. Gundlach,Jeffery Kissel,J. Warner,H. Radkins,T. J. Shaffer,B. Lantz,R. Mittleman,Fabrice Matichard,R. M. S. Schofield +10 more
TL;DR: In this paper, the authors demonstrate the use of a high-precision ground rotation sensor to subtract wind-induced tilt noise in a horizontal broadband seismometer at frequencies above 10mHz.
Journal ArticleDOI
A 6D interferometric inertial isolation system
TL;DR: In this paper, an inertial-isolation scheme based on six-degree-of-freedom (6D) interferometric sensing of a single reference mass is proposed, which is capable of reducing inertial motion by more than two orders of magnitude at 100\,mHz compared with what is achievable with state of the art seismometers.
Journal ArticleDOI
A 6D interferometric inertial isolation system
TL;DR: In this article, an inertial-isolation scheme based on six-degree-of-freedom (6D) interferometric sensing of a single reference mass is proposed, which is capable of reducing inertial motion by more than two orders of magnitude at 100\,mHz compared with what is achievable with state of the art seismometers.
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