Fusion Energy Net Gain Repeated and Improved

Following the National Ignition Facility's historic fusion ignition in 2022, researchers at NIF and the private company Commonwealth Fusion Systems published 2025 results demonstrating repeated and improved net energy gain in fusion reactions. Commonwealth Fusion's high-temperature superconducting magnet technology achieved field strengths 20% above target, clearing the path for its SPARC demonstration reactor. Scientists described 2025 as the year fusion energy definitively transitioned from theoretical to engineering challenge.