Firefly Fusion

🇫🇷 Aix-en-Provence, FR · Active

Firefly Fusion is a privately held fusion start-up headquartered in Aix-en-Provence, France. It is designing a compact tokamak shaped for negative triangularity, in which the plasma's D-shaped cross-section is reversed, a shape that experiments on the DIII-D tokamak in San Diego and elsewhere have linked to better confinement and stability. The machine would use actively cooled copper magnets rather than superconducting ones, so the company can build and iterate without waiting for superconducting magnet development. Its planned prototype is called LUCIOLE. Firefly collaborates with the DIII-D National Fusion Facility on negative-triangularity experiments and analysis, and is a member of the Fusion Industry Association.