Next generation ion engines: mission performances

Abstract

Significant technology advances over the NSTAR DS1 ion engine were sought, especially an increase in specific impulse, total impulse, power and efficiency, and a decrease in propulsion dry mass. Two ion engine designs, one based on a derivative of the NSTAR 30-cm and the other one based on a 40-cm ion engine design, were identified as potential next generation technologies. This paper summarizes the characteristics of the three technologies in question, and their mission performances for Solar System Exploration and Primitive Bodies Exploration missions.