Development of a Double Pendulum for Gravitational Wave Detectors

Details Development of a Double Pendulum for Gravitational Wave Detectors Development of a Double Pendulum for Gravitational Wave Detectors

1999-11-08

arxiv.org/abs/gr-qc/9911027v1

Astronomy and Astrophysics

Astrophysics

General Relativity and Quantum Cosmology

one page, one figure, RevTeX, to appear in the proceedings of the Third Amaldi conference

Scientific paper

10.1063/1.1291907

Seismic noise will be the dominant source of noise at low frequencies for ground based gravitational wave detectors, such as LIGO now under construction. Future interferometers installed at LIGO plan to use at least a double pendulum suspension for the test masses to help filter the seismic noise. We are constructing an apparatus to use as a test bed for double pendulum design. Some of the tests we plan to conduct include: dynamic ranges of actuators, and how to split control between the intermediate mass and lower test mass; measurements of seismic transfer functions; measurements of actuator and mechanical cross couplings; and measurements of the noise from sensors and actuators. All these properties will be studied as a function of mechanical design of the double pendulum.

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