Halo Hall-Effect Thruster
Halo is a Hall effect thruster designed for CubeSats. Halo delivers up to 10.5 mN of thrust and up to 1300s Isp, takes up less than ¼U, and weighs just 0.48 kg. It can provide up to 1 km/s dV to a 6U CubeSat. ExoTerra recently completed testing of the second-generation Halo design.
Halo uses iodine propellant stored as a solid during launch, reducing tank size and spacecraft mass vs. xenon. The thruster’s versatile design allows it to use gaseous xenon in place of iodine in applications where spacecraft volume is less constrained.