THE NASA ELECTRIC PROPULSION PROGRAM

Nearly all space missions require on-board propulsion systems and these systems typically have a major impact on spacecraft mass and cost.Electric propulsion systems offer major performance advantages over conventional chemical systems for many mission functions and the NASA Office of Space Access and Technology (GSA T) supports an extensive effort to develop the technology for high-performance, on-board electric propulsion system options to enhance and enable near-and far-term US space missions.This program includes research and development efforts on electrothermal, electrostatic, and electromagnetic propulsion system technologies to cover a wide range of potential applications.To maximize expectations of technology transfer, the program emphasizes strong interaction with the user community through a variety of cooperative and contracted approaches.This paper provides an overview of the GSA T electric propulsion program with an emphasis on recent progress and future directions.