Physics
Scientific paper
Oct 2004
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004esasp.555e..50v&link_type=abstract
Proceedings of the 4th International Spacecraft Propulsion Conference (ESA SP-555). 2-9 June, 2004, Chia Laguna (Cagliari), Sard
Physics
Scientific paper
In the last few years an increase in the use of ion propulsion systems for spacecrafts has been observed. The Proportional Xenon Feed Assembly (PXFA), currently under development at Bradford Engineering B.V. in The Netherlands, is part of the Ion Propulsion Assembly for use on the GOCE spacecraft. The PXFA is the feed system that regulates the pressure down from the propellant tank and provides the xenon flows to the main, cathode and neutralizer inlets of the Ion Thruster Assembly developed by QinetiQ (UK). Due to the high specific impulse of ion thrusters and the relatively low thrust levels (ranging from 1.5 to 20 mN), this places stringent requirements on the controllability of the very low rates by the PXFA. The scientific objectives of the GOCE program, also place stringent microdisturbance requirements on the PXFA. This techniques used in the PXFA as developed for the GOCE spacecraft, will also be an enabling technology for a variety of future science and microgravity missions.
van der List M.
van Put P.
Yuce V.
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