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http://hdl.handle.net/20.500.12386/26462
Titolo: | Approaching Free Fall on Two Degrees of Freedom: Simultaneous Measurement of Residual Force and Torque on a Double Torsion Pendulum | Autori: | Bassan, M. Cavalleri, A. De Laurentis, M. De Marchi, F. De Rosa, R. Di Fiore, L. Dolesi, R. Finetti, N. Garufi, F. GRADO, ANIELLO Hueller, M. Marconi, L. Milano, L. Pucacco, G. Stanga, R. VISCO, Massimo Vitale, S. Weber, W. J. |
Data pubblicazione: | 2016 | Rivista: | PHYSICAL REVIEW LETTERS | Numero: | 116 | Fascicolo: | 5 | Da pagina:: | 051104 | Abstract: | A torsion pendulum with 2 soft degrees of freedom (DOFs), realized by off-axis cascading two torsion fibers, has been built and operated. This instrument helps characterize the geodesic motion of a test mass for LISA Pathfinder or any other free-fall space mission, providing information on cross talk and other effects that cannot be detected when monitoring a single DOF. We show that it is possible to simultaneously measure both the residual force and the residual torque acting on a quasifree test mass. As an example of the investigations that a double pendulum allows, we report the measurement of the force-to-torque cross talk, i.e., the amount of actuation signal, produced by applying a force on the suspended test mass, that leaks into the rotational DOF, detected by measuring the corresponding (unwanted) torque. | URI: | http://hdl.handle.net/20.500.12386/26462 | URL: | https://journals.aps.org/prl/abstract/10.1103/PhysRevLett.116.051104 | ISSN: | 0031-9007 | DOI: | 10.1103/PhysRevLett.116.051104 | Bibcode ADS: | 2016PhRvL.116e1104B | Fulltext: | open |
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