World’s largest stellarator fusion power design gets funding boost 

Type One Energy, a fusion startup backed by Bill Gates, has secured $87 million in new funding to advance its stellarator fusion power design, bringing its total venture investment to over $160 million. The company is developing Infinity One, the world’s largest and most advanced stellarator testbed, located at a former fossil plant site in Clinton, Tennessee. This project aims to demonstrate improved manufacturing, construction, and commissioning processes using advanced methods, while verifying key fusion technologies such as modular high-temperature superconducting magnets, plasma performance with a metallic first wall, reduced plasma heat loss, and enhanced exhaust efficiency. Stellarators are highlighted as one of the most promising fusion concepts due to their stable, steady-state operation and predictable plasma performance, which reduces risks associated with commercial fusion power. Type One Energy leverages modern computational physics and high-performance computing to optimize the complex three-dimensional magnetic fields required for stellarator operation. The company is currently raising a $250 million Series B round at a $900 million valuation,