ITER — deuterium-tritium operation (planned)
~ 2039ITER
Full D-T phase under the 2024 baseline; first plasma now 2034.
All actors 
ITER
Profile
35-nation megaproject building the largest tokamak; first plasma rebaselined to 2034.
Editorial profile — compiled by us from public sources.
- Headquarters
- Saint-Paul-lès-Durance, France
Current standings
Standings and milestones are always verified by us against primary sources, regardless of who manages the profile.
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Roadmap & milestones
Central Solenoid complete — world's most powerful pulsed magnet
2026-05ITER / General Atomics
The 13-tesla, ~1,000-tonne Central Solenoid — the 'beating heart' built by General Atomics to drive ITER's plasma current — is complete and delivered to the site. A key assembly milestone toward first plasma (2034); the full pulsed-magnet system was ~15 years in the making.
First plasma (2024 baseline)
~ 2034ITER
Start of scientific operation under the rebaselined schedule.
Westinghouse $180M ITER vacuum-vessel contract
2025-06ITER / Westinghouse
A $180M contract for Westinghouse to complete and weld ITER's vacuum vessel — the hermetic double-walled steel chamber that houses the plasma — joining its nine sectors into a single ring, the most intensive stage of ITER assembly.
