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Review of Scientific Instruments 71 (2000) 2890-2894
Control of the double pendulum optics suspension system of a 30 m triangular Fabry-Pérot cavity
M. Barsuglia1, F. Bondu1, H. Heitmann1, P. Heusse1, C. N. Man1, L. Matone1

We present a technique for the control of a double pendulum suspension system used to carry the optical elements of a 30 m long Fabry-Pérot cavity, a prototype for the mode cleaner of the VIRGO experiment. The movement of the payload is sensed with a charge coupled device camera, and the feedback forces are applied to the intermediate stage of the suspension via coil-magnet systems. The control strategy is explained and the application of the system for the longitudinal locking of the cavity is demonstrated.
1 :  LAL - Laboratoire de l'Accélérateur Linéaire
Physique/Astrophysique/Instrumentation et méthodes pour l'astrophysique

Planète et Univers/Astrophysique/Instrumentation et méthodes pour l'astrophysique
Gravitational radiation detectors – mass spectrometers – and other instrumentation and techniques – Gravitational wave detectors and experiments – Servo and control equipment – robots – Interferometers – Lenses – prisms and mirrors – Mechanical instruments and equipment