The Virgo automatic alignment system

Details The Virgo automatic alignment system The Virgo automatic alignment system

Apr 2006

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006cqgra..23s..91a&link_type=abstract

Classical and Quantum Gravity, Volume 23, Issue 8, pp. S91-S101 (2006).

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Scientific paper

The automatic alignment system of the Virgo interferometer differs substantially from those used in similar experiments, since it uses a variant of the Anderson technique. This implies a completely different control topology with respect to other detectors, and the main feature is a strong coupling of different degrees of freedom in the optical signals. It also provides two extra output ports in which differential wave-front sensors can be placed, namely the light transmitted by the Fabry Perot arm cavities. We report on the first experimental demonstration of this technique on a large scale recycled interferometer, and on the present status of the automatic alignment system.

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