Seismic isolation of Advanced LIGO: Review of strategy, instrumentation and performance
Name
Seismic isolation.pdf
Size
1.62 MB
Format
Adobe PDF
Checksum (MD5)
5dba63681a792bf83000ab071c761de8
Author(s)
Matichard, Fabrice
Mittleman, Richard K
Mason, Kenneth R
Barnum, Sam
Biscans, Sebastien
Evans, Matthew J
Foley, Stephany
Fritschel, Peter K
Hillard, Michael W.
MacInnis, Myron E
Date Issued
August 2015
Journal
Classical and Quantum Gravity
Publisher
IOP Publishing
Citation
Matichard, F; Lantz, B; Mittleman, R; Mason, K; Kissel, J; Abbott, B; Biscans, S; et al. “Seismic Isolation of Advanced LIGO: Review of Strategy, Instrumentation and Performance.” Classical and Quantum Gravity 32, no. 18 (August 24, 2015): 185003. © 2015 IOP Publishing Ltd
Version
Original manuscript
Abstract
The new generation of gravitational waves detectors require unprecedented levels of isolation from seismic noise. This article reviews the seismic isolation strategy and instrumentation developed for the Advanced LIGO observatories. It summarizes over a decade of research on active inertial isolation and shows the performance recently achieved at the Advanced LIGO observatories. The paper emphasizes the scientific and technical challenges of this endeavor and how they have been addressed. An overview of the isolation strategy is given. It combines multiple layers of passive and active inertial isolation to provide suitable rejection of seismic noise at all frequencies. A detailed presentation of the three active platforms that have been developed is given. They are the hydraulic pre-isolator, the single-stage internal isolator and the two-stage internal isolator. The architecture, instrumentation, control scheme and isolation results are presented for each of the three systems. Results show that the seismic isolation sub-system meets Advanced LIGO's stringent requirements and robustly supports the operation of the two detectors.
MIT Department
MIT Kavli Institute for Astrophysics and Space Research
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Creative Commons Attribution-Noncommercial-Share Alike
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DOI of Published Version
http://dx.doi.org/10.1088/0264-9381/32/18/185003
