The Virgo automatic alignment system

F. Acernese, P. Amico, M. Al-Shourbagy, S. Aoudia, S. Avino, D. Babusci, G. Ballardin, R. Barillé, F. Barone, L. Barsotti, M. Barsuglia, F. Beauville, M.A. Bizouard, C. Boccara, F. Bondu, L. Bosi, C. Bradaschia, S. Braccini, A. Brillet, V. BrissonL. Brocco, D. Buskulic, E. Calloni, E. Campagna, F. Cavalier, R. Cavalieri, G. Cella, E. Chassande-Mottin, C. Corda, A-C. Clapson, F. Cleva, J-P. Coulon, E. Cuoco, V. Dattilo, M. Davier, R. de Rosa, L. di Fiore, A. di Virgilio, B. Dujardin, A. Eleuteri, D. Enard, I. Ferrante, F. Fidecaro, I. Fiori, R. Flaminio, J-D. Fournier, S. Frasca, F. Frasconi, A. Freise, L. Gammaitoni, A. Gennai, A. Giazotto, G. Giordano, L. Giordano, R. Gouaty, D. Grosjean, G. Guidi, S. Hebri, H. Heitmann, P. Hello, L. Holloway, S. Kreckelbergh, P. la Penna, V. Loriette, M. Loupias, G. Losurdo, J-M. Mackowski, E. Majorana, C.N. Man, M. Mantovani, F. Marchesoni, F. Marion, J. Marque, F. Martelli, A. Masserot, M. Mazzoni, L. Milano, C. Moins, J. Moreau, N. Morgado, B. Mours, A. Pai, C. Palomba, F. Paoletti, S. Pardi, A. Pasqualetti, R. Passaquieti, D. Passuello, B. Perniola, F. Piergiovanni, L. Pinard, R. Poggiani, M. Punturo, P. Puppo, K. Qipiani, P. Rapagnani, V. Reita, A. Remillieux, F. Ricci, I. Ricciardi, P. Ruggi, G. Russo, S. Solimeno, A. Spallicci, R. Stanga, R. Taddei, D. Tombolato, M. Tonelli, A. Toncelli, E. Tournefier, F. Travasso, G. Vajente, D. Verkindt, F. Vetrano, A. Viceré, J-Y. Vinet, H. Vocca, M. Yvert, Z. Zhang

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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. © 2006 IOP Publishing Ltd.
Original languageEnglish
JournalClassical and Quantum Gravity
Issue number8
Publication statusPublished - 21 Apr 2006
Externally publishedYes


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