The last-stage suspension of the mirrors for the gravitational wave antenna Virgo

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., Confortolo G., Corda C., Coulon JP., Cuocolo 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., Flaminio R., Fournier JD., Frasca S., Frasconi F., Gammaitoni L., Gennai A., Giazotto A., Giordan G., Guidi G., Heitmann H., Hello P., Heusse P., Holloway L., Kreckelbergh S., La Penna P., Loriette V., Loupias M., Losurdolo 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: 1 INFN, sez. Napoli and/or Univ. di Napoli ‘Federico II’ Complesso, Universitario di Monte S. Angelo, and/or Univ. di Salerno, Fisciano (Sa), Italy
2 INFN, Sezione di Perugia and/or Univ. di Perugia, Perugia, Italy
3 Laboratoire de l’Accélérateur Linéaire (LAL), IN2P3/CNRS–Univ. de Paris-Sud, Orsay, France
4 INFN, Laboratori Nazionali di Frascati, Frascati (Rm), Italy
5 European Gravitational Observatory (EGO), Cascina (Pi), Italy
6 INFN, Sezione di Pisa and/or Univ. di Pisa, Pisa, Italy
7 Lab. d’Annecy-le-Vieux de phys. des particules, Annecy-le-Vieux, France
8 ESPCI, Paris, France
9 Observatoire de la Cˆote d’Azur, Département Fresnel Interférométrie Laser pour la Gravitation et l’Astrophysique, Nice, France
10 INFN, Sez. Firenze/Urbino, Sesto Fiorentino, and/or Univ. di Firenze, and/or Osservatorio Astrofisico di Arcetri, Firenze and/or Univ. di Urbino, Italy
11 INFN, Sezione di Roma and/or Univ. ‘La Sapienza’, Roma, Italy
12 SMA, IPNL, Villeurbanne, Lyon, France

Abstract: We present the last-stage suspension for the mirrors of the gravitational wave antenna Virgo. We studied some problems encountered during the commissioning of the Virgo central interferometer (CITF) and solved them with the aim of achieving the target sensitivity of the detector in its final configuration. We measured the effect of the holder on the internal motion of the mirror, and the residual nonlinear couplings between the electromagnetic actuators and the metallic parts present on the last-stage suspension. The limits experienced on the Virgo CITF have helped us to define some important modifications to be applied to the last-stage suspension. Moreover, we present the experimental study of west input mirror internal modes after it was dismounted from the Virgo central interferometer. The results were useful to identify, in the data of the engineering run 4 of the CITF, the thermal peaks of such a mirror.

Journal/Review: CLASSICAL AND QUANTUM GRAVITY

Volume: 21 (5)      Pages from: S425  to: S432

KeyWords: gravitational wave antenna; suspended mirrrors;
DOI: 10.1088/0264-9381/21/5/007

Citations: 6
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