The mirrors of interferometric detectors of gravitational waves (GW) are suspended in order to be isolated from external disturbances. A local control system able to keep them correctly aligned and to damp the angular modes of the suspension is necessary. In this paper we present the solution adopted for Virgo based on a CCD camera sensor and on digital controls. With this solution the mirrors are kept aligned at the level of less than 1 lrad rms, enough to lock the interferometer and start the automatic alignment system.

A local control system for the test masses of the Virgo gravitational waves detector

ACERNESE, Fausto;BARONE, Fabrizio;
2004-01-01

Abstract

The mirrors of interferometric detectors of gravitational waves (GW) are suspended in order to be isolated from external disturbances. A local control system able to keep them correctly aligned and to damp the angular modes of the suspension is necessary. In this paper we present the solution adopted for Virgo based on a CCD camera sensor and on digital controls. With this solution the mirrors are kept aligned at the level of less than 1 lrad rms, enough to lock the interferometer and start the automatic alignment system.
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11386/2501361
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