Fusion energy
Tokamaks, stellarators, laser fusion and the private race to put fusion power on the grid.
- WikiCommonwealth Fusion SystemsCommonwealth Fusion Systems is building the SPARC tokamak and the ARC power plant around HTS magnets. Its progress, funding and deals as of 2026.Updated
- WikiHelion EnergyHelion Energy builds pulsed field-reversed-configuration fusion machines and is constructing Orion, a plant meant to power Microsoft from 2028.Updated
- WikiHigh-temperature superconducting fusion magnetsREBCO high-temperature superconducting magnets reached 20 tesla in 2021 and enable compact tokamaks like SPARC. How they work and why they matter.Updated
- WikiITERITER is the international fusion megaproject in southern France. Its goals, members, 2024 rebaseline to 2034 and 2039, and assembly progress in 2026.Updated
- WikiNational Ignition Facility (NIF)The National Ignition Facility at Lawrence Livermore achieved fusion ignition in 2022 and 11 times by June 2026. Records, method and caveats.Updated
- WikiStellaratorStellarators confine fusion plasma with twisted external coils and no plasma current. How they differ from tokamaks and who is building them in 2026.Updated
- WikiTokamakThe tokamak is the doughnut-shaped magnetic fusion machine behind ITER, JET, EAST and SPARC. How it works, its records and its limits in 2026.Updated
- WikiWendelstein 7-XWendelstein 7-X in Greifswald is the world's largest stellarator. Its design, 2025 triple-product record and role in Europe's stellarator push.Updated
- AnalysisWhen will fusion power reach the grid? The 2026 debateCompanies and governments target fusion electricity between 2028 and the mid-2030s. The evidence for and against those timelines as of October 2026.Updated
- ExplainerFusion's engineering wall: tritium fuel and neutron-proof materialsWhy tritium supply, breeding blankets and 14 MeV neutron damage are among fusion's hardest remaining problems, and what is being built to solve them.Updated
- ExplainerHow fusion worksHow nuclear fusion releases energy, why it needs 150 million degrees, and what the triple product, ignition and Q actually measure.Updated
- ExplainerMagnetic vs inertial fusion: the main ways to confine a plasmaHow tokamaks, stellarators, laser fusion and magnetized-target machines each try to hold fusion fuel long enough to burn, and where each stood in 2026.Updated