Pulsar Fusion Achieves First Plasma in Sunbird Nuclear Fusion Rocket at MARS Conference

Pulsar Fusion demonstrated its Sunbird nuclear fusion rocket's 'first plasma' during the MARS Conference hosted by Jeff Bezos. This marks a significant milestone in developing a nuclear fusion exhaust system for space travel. The test was live-streamed from Bletchley, UK, showcasing plasma confinement within the exhaust architecture. Future developments will focus on gathering performance data and studying neutron radiation effects in collaboration with the UK Atomic Energy Authority.

Published Mar 27, 2026

Pulsar Fusion achieved 'first plasma' in its Sunbird nuclear fusion rocket during the MARS Conference in California, hosted by Jeff Bezos. This event marked the first demonstration of a nuclear fusion exhaust system designed for space travel.

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The test, conducted in Bletchley, UK, utilized krypton as a propellant and showcased plasma confinement within the exhaust architecture. Future phases will involve collecting performance data on thrust and exhaust velocity, and a collaboration with the UK Atomic Energy Authority will investigate neutron radiation effects. Pulsar plans to upgrade to high-temperature superconducting magnets and explore aneutronic fusion fuel cycles for the Sunbird propulsion system.