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The ITER Tokamak

The tokamak is an experimental machine designed to harness the energy of fusion. ITER will be the world's largest tokamak, with a plasma radius (R) of 6.2 m and a plasma volume of 840 m³.

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Magnets

Ten thousand tonnes of superconducting magnets will produce the magnetic fields to initiate, confine, shape and control the ITER plasma.

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Vacuum Vessel

The stainless steel vacuum vessel houses the fusion reactions and acts as a first safety containment barrier.

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Blanket

The blanket shields the steel vacuum vessel and external machine components from high-energy neutrons produced during the fusion reaction.

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Divertor

Positioned at the bottom of the vacuum vessel, the divertor controls the exhaust of waste gas and impurities from the reactor and withstands the highest surface heat loads of the ITER machine.

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Cryostat

The stainless steel cryostat (29 x 29 m) surrounds the vacuum vessel and superconducting magnets and ensures a super-cool, vacuum environment.

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A giant

23,000
Machine weight

10x the core of the Sun

million°C
Plasma temperature

Fusion energy

MW
Output power

Packing a punch

GJ
Stored magnetic energy

Colder than Pluto

K
Magnet temperature (-269°C)

2x around the globe

km
Nb3Sn superconducting strand

Heavier than the Eiffel Tower

t
Steel plasma chamber

Largest among tokamaks

m3
Plasma volume

Record radius

m
Plasma major radius (6.2 m)

Protective boundary


Blanket Modules

1st actively cooled blanket

MW
Maximal thermal load

Covering 600 m2


Design variants

Modular precision


Cassettes

Tungsten coated

MW/m2
Highest heat load

Each cassette

t
Positioned by remote handling

Cryostat vacuum

million
Times less dense than air

Massive

t
Of steel

Largest stainless steel vacuum chamber in the world

m3
Total volume

Choose a component

  • The TOKAMAK
  • Magnets
  • Vacuum Vessel
  • Blanket
  • Divertor
  • Cryostat

Supporting Systems