A torsion pendulum with 2 soft degrees of freedom (DOF), realized by off-axis cascading two torsion fibers, has been built and operated. This instrument allows simultaneous measurement of force and torque acting on the suspended test mass, approaching free-fall condition down to a few mHz. It was developed for ground testing on two DOFs, before the launch, of the Gravitational Reference Sensor of the LISA-Pathfinder mission. We will report on the results of some measurement campaigns devoted in particular to the characterization of force to torque and torque to force actuation cross-talks. We will also indicate further possible upgrades of the facility for application for ground testing of future space gravitational wave antennas or other space experiments requiring drag-free control.
A two-stage torsion pendulum for ground testing free fall conditions on two degrees of freedom / Bassan, M., Cavalleri, A., De Laurentis, M., De Marchi, F., De Rosa, R., Di Fiore, L., Dolesi, R., Finetti, N., Garufi, F., Grado, A., Hueller, M., Milano, L., Pucacco, G., Stanga, R., Vetrugno, D., Visco, M., Vitale, S., Weber, W.J.. - In: NUCLEAR AND PARTICLE PHYSICS PROCEEDINGS. - ISSN 2405-6014. - 291-293:(2017), pp. 134-139. [10.1016/j.nuclphysbps.2017.06.027]
A two-stage torsion pendulum for ground testing free fall conditions on two degrees of freedom
De Laurentis M.;De Rosa R.;Garufi F.;Milano L.;
2017
Abstract
A torsion pendulum with 2 soft degrees of freedom (DOF), realized by off-axis cascading two torsion fibers, has been built and operated. This instrument allows simultaneous measurement of force and torque acting on the suspended test mass, approaching free-fall condition down to a few mHz. It was developed for ground testing on two DOFs, before the launch, of the Gravitational Reference Sensor of the LISA-Pathfinder mission. We will report on the results of some measurement campaigns devoted in particular to the characterization of force to torque and torque to force actuation cross-talks. We will also indicate further possible upgrades of the facility for application for ground testing of future space gravitational wave antennas or other space experiments requiring drag-free control.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
