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Fusion glossary

J

The Joint European Torus, JET, operated between 1983 and 2023 as a joint European project at the Culham Centre for Fusion Energy, UK. It completed its 40-year operational lifetime in autumn 2023 and is now slated for repurposing and decommissioning (2024-2040). Read more about the JET device and its many milestones here. 

The upgrade of the Japanese JT-60 tokamak. On achieving first plasma in October 2023, JT-60SA became the world's largest functioning tokamak. See the JT-60SA website.