Longest fusion plasma duration
The current longest fusion plasma duration record is 22:17 (1,337 s) at about 50 million degree, held by CEA WEST tokamak, set on February 12, 2025. Last checked October 9, 2026.
22:17 (1,337 s) at about 50 million degree
CEA WEST tokamak
- Holder
- CEA WEST tokamak
- Record
- 22:17 (1,337 s) at about 50 million degree
- Exact figure
- 22:17 (1,337 s) at about 50 million degrees
- Location
- Cadarache, France
- Date set
- February 12, 2025
- Recognized by
- CEA
- Last checked
- October 9, 2026
Sources
- insidehpc.com Cea claims nuclear fusion energy record for plasma duration
- chalmers.se See seconds the longest fusion experiment ever
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