Energetic ion emission for active spacecraft control

Details Energetic ion emission for active spacecraft control Energetic ion emission for active spacecraft control

Dec 1992

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992adspr..12...61s&link_type=abstract

(Active experiments in space; Proceedings of the Topical Meeting of the Interdisciplinary Scientific Commission D /Meeting D3/ o

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Energetic Particles, Ion Emission, Ion Sources, Liquid Metals, Spacecraft Control, Cold Cathodes, High Voltages, Indium, Ion Currents, Nitrogen Ions

Scientific paper

First results from vacuum chamber tests are presented, and the emission behavior and characteristics of emitters producing In(+) and N2(+) beams with an energy of not less than 5 keV are described. The liquid metal ion source (LMIS) is a 'solid-needle' type liquid metal ion source using indium as a charge metal. The typical operating characteristics of the LMIS for space applications require a high voltage of 5 to 8 kV applied across the extraction electrode and the needle/reservoir combination. The nitrogen ion source (NIS) is a type of cold cathode source based on prolonged electron oscillatory paths around an electric field saddle point. Both LMIS and NIS are designed for a mean operational lifetime of 5000 hr in orbit at a typical ion emission current of 10 micro-A.

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