Halo Thrusters

ExoTerra offers complete propulsion solutions including miniature Hall-effect thrusters, power processing units, and xenon/krypton flow control systems for affordable high-impulse microsatellite and CubeSat propulsion. If you are interested in our electric propulsion systems, please contact us for more information.


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ExoTerra’s revolutionary Halo Hall-Effect Thruster allows CubeSats to escape their rideshare drop-off orbits to reach optimal orbits, maintain them for long durations, and deorbit on command. Halo meets the tight mass, volume, and thermal constraints of CubeSats and other rideshare spacecraft, and its high Isp and total impulse expand the mission potential of CubeSats by enabling them to attain and maintain targeted orbits. With Halo, CubeSats can perform better science, extend their useful lifetime, operate together in structured constellations, and even conduct low-cost lunar and interplanetary missions. Halo has demonstrated operation at input power levels between 100 and 450 W, making it the perfect choice for satellites from 6U CubeSats up to ESPA class.

Hall-effect thrusters provide CubeSat and small satellites superior total impulse performance compared to combustion, electrospray, or pulsed plasma propulsion options.  This enables a broader spectrum of missions and a longer satellite lifetime. Halo’s demonstrated thrust range of 4-30 mN with xenon propellant decreases total transfer time over ion engine alternatives.  Total specific impulse correspondingly ranges from 700-1500 s, allowing Halo to produce greater ΔV from a given propellant volume than other options. This high thrust and high efficiency fits into a compact space: Halo weighs only 0.83 kg and fits within a 80 mm diameter by 75 mm long envelope. Halo has been successfully tested with both xenon and krypton, providing an easy flexibility in propellant choice to help manage mission costs. 


Download the Halo-Krypton Spec Sheet

Halo- Xenon

Download the Halo-Xenon Spec Sheet

Halo 12

Download the Halo 12 Spec Sheet

Halo 12