Current technology in ion and electrothermal propulsion

Abstract

As Earth-orbital and interplanetary spacecraft missions become longer and more complex, the demands placed on spacecraft propulsion systems become much more stringent. In several instances, combinations of mission and spacecraft requirements such as weight, size, life, and total impulse have precluded the use of the more conventional chemical, and cold gas propulsive systems. As a result, high-performance propulsion devices, such as electrostatic ion engines and electrothermal thrusters, are achieving wide user acceptance. This paper surveys the current technology and projected development trends in the areas of ion and electrothermal propulsion systems and components.