An ion thruster is a form of electric propulsion used for in-mission spacecraft maneuvering, including satellite orientation, station-keeping, and interplanetary propulsion of low-mass robotic vehicles.

These systems rely on electrical power to accelerate ions and generate thrust, enabling very high exhaust velocities and efficient long-duration propulsion with minimal propellant consumption.

Radiation-hardened GaN power devices enable smaller, lighter, and more efficient power supplies for ion thrusters, increasing available power delivery while reducing system size and thermal constraints.

This is particularly critical for modern space missions, where propulsion efficiency, mass reduction, and long operational lifetimes directly impact mission capability.