First locking of the Virgo central area interferometer with suspension hierarchical control

Year: 2004

Authors: Acernese F., Amico P., Arnaud N., Babusci D., Barille R., Barone F., Barsotti L., Barsuglia M., Beauville F., Bizouard MA., Boccara C., Bondu F., Bosi L., Bradaschia C., Bracci L., Braccini S., Brillet A., Brisson V., Brocco L., Buskulic D., Calamai G., Calloni E., Campagna E., Cavalier F., Cella G., Chassande-Mottin E., Cleva F., Cokelaer T., Conforto G., Corda C., Coulon JP., Cuoco E., Dattilo V., Davier M., De Rosa R., Di Fiore L., Di Virgilio A., Dujardin B., Eleuteri A., Enard D., Ferrante I., Fidecaro F., Fiori I., Flamino R., Fournier JD., Frasca S., Frasconi F., Gammaitoni L., Gennai A., Giazotto A., Giordano G., Guidi G., Heitmann H., Hello P., Heusse P., Holloway L., Kreckelberg S., La Penna P., Loriette V., Loupias M., Losurdo G., Mackowski JM., Majorana E., Man CN., Marion F., Martelli F., Masserot A., Massonnet L., Mazzoni M., Milano L., Moreau J., Moreau F., Morgado N., Mornet F., Mours B., Pacheco J., Pai A., Palomba C., Paoletti F., Passaquieti R., Passuello D., Perniola B., Pinard L., Poggiani R., Punturo M., Puppo P., Qipiani K., Ramonet J., Rapagnani P., Reita V., Remillieux A., Ricci F., Ricciardi I., Russo G., Solimeno S., Stanga R., Toncelli A., Tonelli M., Tournefier E., Travasso F., Trinquet H., Varvella M., Verkindt D., Vetrano F., Veziant O., Vicere A., Vinet JY., Vocca H., Yvert M.

Autors Affiliation: INFN––sez. Napoli and/or Università di Napoli ‘‘Federico II’’ Complesso Universitario di Monte S. Angelo Via Cintia, I-80126 Napoli, Italia and/or Università di Salerno Via Ponte Don Melillo, I-84084 Fisciano (Salerno), Italy; INFN Sezione di Perugia and/or Università di Perugia, Via A. Pascoli, I-06123 Perugia, Italy; Laboratoire de l’Accélérateur Linéaire (LAL), IN2P3/CNRS-Université de Paris-Sud, B.P. 34, 91898 Orsay Cedex, France; INFN, Laboratori Nazionali di Frascati Via E. Fermi, 40, I-00044 Frascati (Roma), Italy: European Gravitational Observatory (EGO), Via E. Amaldi, I-56021 Cascina (PI), Italy

Abstract: Operation of the central portion of Virgo as a simple 6 in Michelson interferometer has given the first demonstration of the possibility to control an interferometer suspended from Virgo full scale multistage seismic attenuators using information derived from the interferometer locking signal. A special role in the control is played by the first stage of these suspensions, an inverted pendulum: besides its seismic preisolation action, this stage has positioning dynamics of several mm, and it allows to exert a very low frequency control at the tipper level of the suspension using the interferometer fringe signal. The application of this feedback to the top-stage of the suspension allows corrections of drifts, such as tidal ones, at a stage of the suspension where a large dynamic range in displacements is available, without introducing noise at the level of the mirror, resulting in a significant reduction of the lock keeping force applied directly on the mirror at the lowest stage of the attenuator. (C) 2003 Elsevier B.V. All rights reserved.

Journal/Review: ASTROPARTICLE PHYSICS

Volume: 20 (6)      Pages from: 629  to: 640

KeyWords: Michelson interferometer; suspension hierarchical control;
DOI: 10.1016/j.astropartphys.2003.10.003

Citations: 14
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