NASA Technical Reports Server (NTRS) : Primary pdf

NASA Technical Reports Server (NTRS) : Primary

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Description of the Book:

An investigation of the 30-cm engineering-model-thruster technology with emphasis placed on the development of models for understanding and predicting the operational characteristics and wear-out mechanisms of the thruster as a function of operating or design parameters is presented. The task studies include: (1) the wear mechanisms and wear rates that determine the useful lifetime of the thruster discharge chamber; (2) cathode lifetime as determined by the depletion of barium from the barium-aluminate-impregnated-porous-tungsten insert that serves as a barium reservoir; (3) accelerator-grid-system technology; (4) a verification of the high-voltage propellant-flow-electrical-isolator design developed under NASA contract NAS3-20395 for operation at 10-kV applied voltage and 10-A equivalent propellant flow with mercury and argon propellants. A model was formulated for predicting performance

• Creator/s: NASA Technical Reports Server (NTRS
• Date: 11/1/1979
• Year: 1979
• Book Topics/Themes: NASA Technical Reports Server (NTRS), ELECTRIC PROPULSION, HOLLOW CATHODES, ION BEAMS, ION ENGINES, LIFE (DURABILITY), SPUTTERING, BARIUM ALLOYS, ELECTRICAL INSULATION, THERMAL STRESSES, TUNGSTEN, WEAR TESTS, Poeschel, R. L., Beattie, J. R

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