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26 February 2003 Position sensors for flight testing of LISA drag-free control
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Space-based detection of gravitational radiation is limited at low frequencies by stray force contamination of the orbits of ideally 'free-falling' test masses. Shielding a test mass from external forces with a satellite requires precision position sensing that does not itself introduce excessive stray force or springlike coupling to satellite motion. The LISA (Laser Interferometer Space Antenna) mission to observe gravitational waves between 0.1 and 1000 mHz must limit stray acceleration to the fm/s2 square root Hz level, with satellite position control at the nm\rthz\ level. We present here a design, and a discussion of electrostatic disturbances, for a capacitive position sensor for LISA 'drag-free' control, which will be flight-tested with the LISA Technology Package (LTP).
© (2003) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
William J. Weber, Daniele Bortoluzzi, Antonella Cavalleri, Ludovico Carbone, Mauro Da Lio, Rita Dolesi, Giorgio Fontana, C. D. Hoyle, Mauro Hueller, and Stefano Vitale "Position sensors for flight testing of LISA drag-free control", Proc. SPIE 4856, Gravitational-Wave Detection, (26 February 2003);

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