Active seismic isolation for enhanced LIGO detectors

Details Active seismic isolation for enhanced LIGO detectors Active seismic isolation for enhanced LIGO detectors

Jun 2000

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2000aipc..523..300g&link_type=abstract

GRAVITATIONAL WAVES: Third Edoardo Amaldi Conference. AIP Conference Proceedings, Volume 523, pp. 300-305 (2000).

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Gravitational Radiation Detectors, Mass Spectrometers, And Other Instrumentation And Techniques, Gravitational Wave Detectors And Experiments

Scientific paper

The levels of seismic isolation needed for LIGO II will require a dramatic technological shift from the systems used in the initial LIGO detector. To take advantage of the improved thermal noise of a 30 kg test mass made of high-Q material and suspended with fused silica fibers, one must attenuate the ground motion by more than 10 orders of magnitude at 10 Hz. Aggressive active isolation of ground motion to reduce the root-mean-squared ground displacement and the displacement noise in the gravitational wave band, coupled with multiple pendulum suspensions, can make this possible. We will describe the mechanical design for such a system, and discuss the issues of active control that confront this endeavor. .

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