Scientific Results

Characterization of the Virgo seismic environment

Year: 2012

Authors: Accadia T., Acernese F., Astone P., Ballardin G., Barone F., Barsuglia M., Basti A., Bauer Th. S., Bebronne M., Beker M. G., Belletoile A., Bitossi M., Bizouard M.A., Blom M., Bondu F., Bonelli L., Bonnand R., Boschi V., Bosi L., Bouhou B., Braccini S., Bradaschia C., Branchesi M., Briant T., Brillet A., Brisson V., Bulik T., Bulten H J., Buskulic D., Buy C., Cagnoli G., Calloni E., Canuel B., Carbognani F., Cavalier F., Cavalieri R., Cella G., Cesarini E., Chaibi O., Chassande-Mottin E., Chincarini A., Chiummo A., Cleva F., Coccia E., Cohadon P.-F., Colacino C.N., Colas J., Colla A., Colombini M., Conte A., Coughlin M., Coulon J.-P., Cuoco E., D’Antonio S., Dattilo V., Davier M., Day R., De Rosa R., Debreczeni G., Del Pozzo W., del Prete M., Di Fiore L., Di Lieto A., Di Paolo Emilio M., Di Virgilio A., Dietz A., Drago M., Endrőczi G., Fafone V., Ferrante I., Fidecaro F., Fiori I., Flaminio R., Forte L.A., Fournier J.-D., Franc J., Frasca S., Frasconi F., Galimberti M., Gammaitoni L., Garufi F., Gáspár M. E., Gemme G., Genin E., Gennai A., Giazotto A., Gouaty R., Granata M., Greverie C., Guidi G.M., Hayau J.-F., Heidmann A., Heitmann H., Hello P., Jaranowski P., Kowalska I., Królak A., Leroy N., Letendre N., Li T.G.F., Liguori N., Lorenzini M., Loriette V., Losurdo G., Majorana E., Maksimovic I., Man N., Mantovani M., Marchesoni F., Marion F., Marque J., Martelli F., Masserot A., Michel C., Milano L., Minenkov Y., Mohan M., Morgado N., Morgia A., Mosca S., Mours B., Naticchioni L., Nocera F., Pagliaroli G., Palladino L., Palomba C., Paoletti F., Parisi M., Pasqualetti A., Passaquieti R., Passuello D., Persichetti G., Piergiovanni F., Pietka M., Pinard L., Poggiani R., Prato M., Prodi G.A., Punturo M., Puppo P., Rabeling D.S., Rácz I., Rapagnani P., Re V., Regimbau T., Ricci F., Robinet F., Rocchi A., Rolland L., Romano R., Rosińska D., Ruggi P., Sassolas B., Sentenac D., Sperandio L., Sturani R., Swinkels B., Tacca M., Taffarello L., Toncelli A., Tonelli M., Torre O., Tournefier E., Travasso F., Vajente G., van den Brand J.F.J., Van Den Broeck C., van der Putten S., Vasuth M., Vavoulidis M., Vedovato G., Verkindt D., Vetrano F., Viceré A., Vinet J.-Y., Vitale S., Vocca H., Ward R.L., Was M., Yvert M., Zadroźny A., Zendri J.-P.

Autors Affiliation: Univ Savoie, LAPP, CNRS IN2P3, F-74941 Annecy Le Vieux, France; Ist Nazl Fis Nucl, Sez Napoli, I-80126 Naples, Italy; Univ Naples Federico 2, I-80126 Naples, Italy; Univ Salerno, I-84084 Salerno, Italy; Ist Nazl Fis Nucl, Sez Roma, I-00185 Rome, Italy; Univ Roma La Sapienza, I-00185 Rome, Italy; EGO, I-56021 Cascina, PI, Italy; Univ Paris Diderot, Lab AstroParticule & Cosmol APC, CNRS IN2P3, CEA DSM IRFU,Observ Paris, F-75013 Paris, France; Ist Nazl Fis Nucl, Sez Pisa, I-56127 Pisa, Italy; Univ Pisa, I-56127 Pisa, Italy; Univ Siena, I-53100 Siena, Italy; Nikhef, Amsterdam, Netherlands; Vrije Univ Amsterdam, NL-1081 HV Amsterdam, Netherlands; Univ Paris 11, LAL, CNRS IN2P3, F-91898 Orsay, France; ESPCI, CNRS, F-75005 Paris, France; Univ Nice Sophia Antipolis, CNRS, Observ Cote dAzur, F-06304 Nice, France; Univ Rennes 1, Inst Phys Rennes, CNRS, F-35042 Rennes, France; IN2P3 CNRS, LMA, F-69622 Lyon, France; Ist Nazl Fis Nucl, Sez Perugia, I-06123 Perugia, Italy; Univ Perugia, I-06123 Perugia, Italy; Ist Nazl Fis Nucl, Sez Firenze, I-50019 Sesto Fiorentino, Italy; Univ Urbino Carlo Bo, I-61029 Urbino, Italy; Univ Paris 06, UPMC, CNRS, Lab Kastler Brossel,ENS, F-75005 Paris, France; IM PAN, PL-00956 Warsaw, Poland; Warsaw Univ, Astron Observ, PL-00478 Warsaw, Poland; CAMK PAN, PL-00716 Warsaw, Poland; Bialystok Univ, PL-15424 Bialystok, Poland; IPJ, PL-05400 Swierk Otwocke, Poland; Inst Astron, PL-65265 Zielona Gora, Poland; Ist Nazl Fis Nucl, Sez Genova, I-16146 Genoa, Italy; Ist Nazl Fis Nucl, Sez Roma Tor Vergata, I-00133 Rome, Italy; Univ Roma Tor Vergata, I-00133 Rome, Italy; Univ Aquila, I-67100 Laquila, Italy; Carleton Coll, Northfield, MN 55057 USA; RMKI, H-1121 Budapest, Hungary; Ist Nazl Fis Nucl, Grp Collegato Trento, I-38050 Povo, Trento, Italy; Univ Trent, I-38050 Povo, Trento, Italy; Ist Nazl Fis Nucl, Sez Padova, I-35131 Padua, Italy

Abstract: The Virgo gravitational wave detector is an interferometer (ITF) with 3 km 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 ITF 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 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 in 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 10 to 100 m. An attempt is made to measure the attenuation of emitted noise at the ITF and correlate it with the distance from the source and with seismic attenuation models in soil.


Volume: 29 (2)      Pages from: 025005  to: 025005

More Information: This project was funded by the NSF through the University of Florida\’s IREU program. The authors acknowledge the support from Italian Ministero dell\’Istruzione, dell\’Universita\’ e della Ricerca through grant PRIN 2007NXMBHP.
DOI: 10.1088/0264-9381/29/2/025005

Citations: 2
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