Active controls in interferometric detectors of gravitational waves: inertial damping of the VIRGO superattenuator

Details Active controls in interferometric detectors of gravitational waves: inertial damping of the VIRGO superattenuator Active controls in interferometric detectors of gravitational waves: inertial damping of the VIRGO superattenuator

2000-02-02

arxiv.org/abs/gr-qc/0002006v2

Astronomy and Astrophysics

Astrophysics

General Relativity and Quantum Cosmology

11 pages, 9 figures. Lecture given at the "International summer school on experimental physics of gravitational waves" - Urbin

Scientific paper

The operation of an interferometer for gravitational waves detection requires sophisticated feedback controls in many parts of the apparatus. The aim of this lecture is to introduce the types of problems to be faced in this line of research. The attention is focused on the "inertial damping" of the test mass suspension of the VIRGO interferometer (the superattenuator): it is a multidimensional local control aimed to reduce the residual motion of the suspended mirror associated to the normal modes of the suspension. Its performance is very important for the locking of the interferometer.

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