Alberto Donazzanhttps://orcid.org/0000-0002-0600-6898,1,2 Giampiero Naletto,3,4,5 Maria G. Pelizzo,4,5 Davide Cuccato,3,4 Alessandro Beghi,3,4 Antonello Ortolan,4 Jacopo Belfi,4 Filippo Bosi,4 Andreino Simonelli,4,6 Nicolò Beverini,4,3 Giorgio Carelli,4,3 Enrico Maccioni,4,3 Rosa Santagata,7 Alberto Porzio,8,4 Angelo Tartaglia,9 Angela Di Virgilio4
1Univ. di Padova (Italy) 2INFN - Sezione di Padova (Italy) 3Univ. degli Studi di Padova (Italy) 4Istituto Nazionale di Fisica Nucleare (Italy) 5CNR-IFN Padova (Italy) 6Ludwig-Maximilians-Univ. München (Germany) 7Observatoire de Paris (France) 8CNR-SPIN (Italy) 9Politecnico di Torino (Italy)
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The sensitivity achieved by large ring-laser gyroscopes will make it possible to detect faint relativistic effects related to the rotation of the Earth’s mass. This task requires a strict control of the ring cavity geometry (shape and orientation), which can be performed by a novel network of portable heterodyne interferometers, capable of measuring the absolute distance betweeen two retro-reflectors with a nominal accuracy better than 1nm. First steps have been taken towards the realization of this device and a starting prototype of distance gauge is under development and test.
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Alberto Donazzan, Giampiero Naletto, Maria G. Pelizzo, Davide Cuccato, Alessandro Beghi, Antonello Ortolan, Jacopo Belfi, Filippo Bosi, Andreino Simonelli, Nicolò Beverini, Giorgio Carelli, Enrico Maccioni, Rosa Santagata, Alberto Porzio, Angelo Tartaglia, Angela Di Virgilio, "A network of heterodyne laser interferometers for monitoring and control of large ring-lasers," Proc. SPIE 9960, Interferometry XVIII, 99600G (28 August 2016); https://doi.org/10.1117/12.2237638