Characterization of the Virgo Seismic Environment
Abstract
The Virgo gravitational wave detector is an interferometer (ITF) with 3km arms located in Pisa, Italy. From July to October 2010, Virgo performed its third science run (VSR3) in coincidence with the LIGO detectors. Despite several techniques adopted to isolate the interferometer from the environment, seismic noise remains an important issue for Virgo. Vibrations produced by the detector infrastructure (such as air conditioning units, water chillers/heaters, pumps) are found to affect Virgo's sensitivity, with the main coupling mechanisms being through beam jitter and scattered light processes. The Advanced Virgo (AdV) design seeks to reduce ITF couplings to environmental noise by having most vibration-sensitive components suspended and in-vacuum, as well as muffle and relocate loud machines. During the months of June and July 2010, a Guralp-3TD seismometer was stationed at various locations around the Virgo site hosting major infrastructure machines. Seismic data were examined using spectral and coherence analysis with seismic probes close to the detector. The primary aim of this study was to identify noisy machines which seismically affect the ITF environment and thus require mitigation attention. Analyzed machines are located at various distances from the experimental halls, ranging from 10m to 100m. An attempt is made to measure the attenuation of emitted noise at the ITF and correlate it to the distance from the source and to seismic attenuation models in soil.
Keywords
Cite
@article{arxiv.1108.1598,
title = {Characterization of the Virgo Seismic Environment},
author = {The Virgo Collaboration and T. Accadia and F. Acernese and P. Astone and G. Ballardin and F. Barone and M. Barsuglia and A. Basti and Th. S. Bauer and M. Bebronne and M. G. Beker and A. Belletoile and M. Bitossi and M. A. Bizouard and M. Blom and F. Bondu and L. Bonelli and R. Bonnand and V. Boschi and L. Bosi and B. Bouhou and S. Braccini and C. Bradaschia and M. Branchesi and T. Briant and A. Brillet and V. Brisson and T. Bulik and H. J. Bulten and D. Buskulic and C. Buy and G. Cagnoli and E. Calloni and B. Canuel and F. Carbognani and F. Cavalier and R. Cavalieri and G. Cella and E. Cesarini and O. Chaibi and E. Chassande-Mottin and A. Chincarini and A. Chiummo and F. Cleva and E. Coccia and P. -F. Cohadon and C. N. Colacino and J. Colas and A. Colla and M. Colombini and A. Conte and M. Coughlin and J. -P. Coulon and E. Cuoco and S. DAntonio and V. Dattilo and M. Davier and R. Day and R. De Rosa and G. Debreczeni and W. Del Pozzo and M. del Prete and L. Di Fiore and A. Di Lieto and M. Di Paolo Emilio and A. Di Virgilio and A. Dietz and M. Drago and G. Endroczi and V. Fafone and I. Ferrante and F. Fidecaro and I. Fiori and R. Flaminio and L. A. Forte and J. -D. Fournier and J. Franc and S. Frasca and F. Frasconi and M. Galimberti and L. Gammaitoni and F. Garufi and M. E. Gaspar and G. Gemme and E. Genin and A. Gennai and A. Giazotto and R. Gouaty and M. Granata and C. Greverie and G. M. Guidi and J. -F. Hayau and A. Heidmann and H. Heitmann and P. Hello and P. Jaranowski and I. Kowalska and A. Krolak and N. Leroy and N. Letendre and T. G. F. Li and N. Liguori and M. Lorenzini and V. Loriette and G. Losurdo and E. Majorana and I. Maksimovic and N. Man and M. Mantovani and F. Marchesoni and F. Marion and J. Marque and F. Martelli and A. Masserot and C. Michel and L. Milano and Y. Minenkov and M. Mohan and N. Morgado and A. Morgia and S. Mosca and B. Mours and L. Naticchioni and F. Nocera and G. Pagliaroli and L. Palladino and C. Palomba and F. Paoletti and M. Parisi and A. Pasqualetti and R. Passaquieti and D. Passuello and G. Persichetti and F. Piergiovanni and M. Pietka and L. Pinard and R. Poggiani and M. Prato and G. A. Prodi and M. Punturo and P. Puppo and D. S. Rabeling and I. Racz and P. Rapagnani and V. Re and T. Regimbau and F. Ricci and F. Robinet and A. Rocchi and L. Rolland and R. Romano and D. Rosinska and P. Ruggi and B. Sassolas and D. Sentenac and L. Sperandio and R. Sturani and B. Swinkels and M. Tacca and L. Taffarello and A. Toncelli and M. Tonelli and O. Torre and E. Tournefier and F. Travasso and G. Vajente and J. F. J. van den Brand and C. Van Den Broeck and S. van der Putten and M. Vasuth and M. Vavoulidis and G. Vedovato and D. Verkindt and F. Vetrano and A. Vicere and J. -Y. Vinet and S. Vitale and H. Vocca and R. L. Ward and M. Was and M. Yvert and A. Zadrozny and J. -P. Zendri},
journal= {arXiv preprint arXiv:1108.1598},
year = {2011}
}
Comments
12 pages, 7 figures, Gravitational-wave Physics and Astronomy Workshop