Electrostatic force actuation is a key component of the system of geodesic reference test masses (TM) for the LISA orbiting gravitational wave observatory and in particular for performance at low frequencies, below 1 mHz, where the observatory sensitivity is limited by stray force noise. The system needs to apply forces of order 10-9 N while limiting fluctuations in the measurement band to levels approaching 10-15 N/Hz1/2. We present here the LISA actuation system design, based on audio-frequency voltage carrier signals, and results of its in-flight performance test with the LISA Pathfinder test mission. In LISA, TM force actuation is used to align the otherwise free-falling TM to the spacecraft-mounted optical metrology system, without any forcing along the critical gravitational wave-sensitive interferometry axes. In LISA Pathfinder, on the other hand, the actuation was used also to stabilize the TM along the critical x axis joining the two TM, with the commanded actuation force ente...
Nano-Newton electrostatic force actuators for femto-Newton-sensitive measurements: System performance test in the LISA Pathfinder mission / Armano, M., Audley, H., Baird, J., Bassan, M., Binetruy, P., Born, M., Bortoluzzi, D., Castelli, E., Cavalleri, A., Cesarini, A., Chiavegato, V., Cruise, A.M., Dal Bosco, D., Danzmann, K., De Deus Silva, M., De Rosa, R., Di Fiore, L., Diepholz, I., Dixon, G., Dolesi, R., et al.. - In: PHYSICAL REVIEW D. - ISSN 2470-0010. - 109:10(2024). [10.1103/PhysRevD.109.102009]
Nano-Newton electrostatic force actuators for femto-Newton-sensitive measurements: System performance test in the LISA Pathfinder mission
Bortoluzzi D.;Castelli E.;Cesarini A.;Chiavegato V.;Dal Bosco D.;Dolesi R.;Ferraioli L.;Ferroni V.;Giardini D.;Giusteri R.;Hueller M.;Russano G.;Sala L.;Vetrugno D.;Vitale S.;Wass P. J.;Weber W. J.;Zanoni C.;
2024-01-01
Abstract
Electrostatic force actuation is a key component of the system of geodesic reference test masses (TM) for the LISA orbiting gravitational wave observatory and in particular for performance at low frequencies, below 1 mHz, where the observatory sensitivity is limited by stray force noise. The system needs to apply forces of order 10-9 N while limiting fluctuations in the measurement band to levels approaching 10-15 N/Hz1/2. We present here the LISA actuation system design, based on audio-frequency voltage carrier signals, and results of its in-flight performance test with the LISA Pathfinder test mission. In LISA, TM force actuation is used to align the otherwise free-falling TM to the spacecraft-mounted optical metrology system, without any forcing along the critical gravitational wave-sensitive interferometry axes. In LISA Pathfinder, on the other hand, the actuation was used also to stabilize the TM along the critical x axis joining the two TM, with the commanded actuation force ente...I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione
