作者: Steven R. Oleson , John M. Sankovic
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摘要: The Hall thruster is an electric propulsion device used for multiple in-space applications including orbit raising, on-orbit maneuvers, and de-orbit functions. These functions are currently performed by toxic hydrazine monopropellant or derivative/nitrogen tetroxide bi-propellant thrusters. operates nominally in the 1500 sec specific impulse regime. It provides greater thrust to power than conventional gridded ion engines, thus reducing trip times operational life when compared that technology Earth applications. far term, adding a second acceleration stage, has shown promise of providing over 4000s Isp, regime engine necessary deep space system consists three parts, thruster, processor, propellant system. commercially available at 1.5 kW level 5 application underway. NASA looking toward 10 eventually 50 kW-class engines ambitious transportation former allows launch vehicle step-down GEO missions demanding planetary such as Europa Lander, while latter quick all-electric LEO transfers non-nuclear human Mars missions.