http://www.cnr.it/ontology/cnr/individuo/prodotto/ID257012

A laser gyroscope system to detect the gravito-magnetic effect on Earth (Articolo in rivista)

Type

Label

A laser gyroscope system to detect the gravito-magnetic effect on Earth (Articolo in rivista) (literal)

Anno

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Alternative label

M Allegrini, J Belfi, N Beverini, F Bosi, B Bouhadef, G Carelli, G Cella, M Cerdonio, AD Di Virgilio, A Gebauer, E Maccioni, A Ortolan, A Porzio, ML Ruggiero, UK Schreiber, S Solimeno, F Stefani, A Tartaglia, J-P Zendri, J-P Wells (2012)
A laser gyroscope system to detect the gravito-magnetic effect on Earth
in Journal of physics. Conference series (Print); IOP Publishing Ltd. (Institute of Physics Publishing Ltd), "Bristol ; London" (Regno Unito)
(literal)

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori

M Allegrini, J Belfi, N Beverini, F Bosi, B Bouhadef, G Carelli, G Cella, M Cerdonio, AD Di Virgilio, A Gebauer, E Maccioni, A Ortolan, A Porzio, ML Ruggiero, UK Schreiber, S Solimeno, F Stefani, A Tartaglia, J-P Zendri, J-P Wells (literal)

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Rivista

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Note

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni

Univ. of Pisa, CNISM, Pisa, Italy INFN Sez. di Pisa, Pisa, Italy INFN Sez. di Padova, Padova, Italy Technische Universitaet Muenchen, Forschungseinrichtung Satellitengeodaesie Fundamentalstation Wettzell, 93444 Bad Kötzting, Germany Laboratori Nazionali di Legnaro, INFN Legnaro (Padova), Italy Univ. of Naples, CNR-SPIN, Naples, Italy Polit. of Torino, INFN, Torino, Italy Department of Physics and Astronomy, University of Canterbury, Christchurch 8020, New Zealand (literal)

Titolo

A laser gyroscope system to detect the gravito-magnetic effect on Earth (literal)

Abstract

Ring lasers are inertial sensors for angular velocity based on the Sagnac effect. In recent years they have reached a very high sensitivity and accuracy; the best performing one, the ring Laser G in Wettzell (Germany), a square ring with 16 m perimeter, has reached a sensitivity of 12prad/s very close to the shot noise limit inferred from ring-down time measurements. On this basis it is expected that an array of six square ring lasers of 36 m perimeter, can perform a 1% accuracy test for the measurement of the Lense-Thirring frame dragging after 2 years of integration time. Essential for this measurement is the comparison between the Earth angular velocity and orientation in space measured with the ring array and compared to the measurement series maintained by the International Earth Rotation and Reference System Service (IERS), which measures Earth Rotation and pole position with respect to remote quasars. It has been shown that the accuracy of G in Wettzell is limited by the low frequency motion of the near surface laboratory, which is of the order of several prad/s, roughly 100 times larger than the Lense-Thirring contribution. For this reason the entire experiment should be placed in a quite underground laboratory, where these perturbations are reduced. The feasibility to properly place such a device inside the GranSasso INFN National Laboratory has been investigated. (literal)

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