Interview

“The repair campaign obliged us to rethink the way we work”

With the completion this autumn of a multiyear campaign to repair key tokamak components, ITER is closing a difficult chapter in its construction history. But the experience has also prompted important changes in the way the project approaches engineering, industrial partnerships and machine assembly. Construction...

Magnet testing

Halfway to full current

In memoriam

Scientist Aparajita Mukherjee

Divertor inner target

First production unit completed in Europe

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Upcoming events

30 Nov 2026

16th ITER International School: "Tokamaks as Fusion Reactors"

The 16th ITER International School on the topic of "Tokamaks as Fusion Reactors" will be held from...

5 Dec 2026

ITER Open Doors Day - December 2026

The ITER Organization and the European agency for ITER, Fusion for Energy, will be hosting free...

12 Apr 2027

4th ITER Public-Private Workshop: Shared challenges, joint solutions

The 4th ITER Public-Private Fusion Workshop will bring together the public and private fusion...

Scientist Aparajita Mukherjee

How fusion is teaching AI new tricks at ITER

Shouldering the load

Of interest View all

JT-60SA: Results from first operating campaign shared at ITER

New report traces development of an industrial ecosystem

JOREK simulation code: now open source

Watch: A new electric era for heavy transport at ITER

ITER in pictures

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Looking up, toward the top of the cylindrical pit

2026-10-19 - Looking up from the level of the supports under the machine. A new sector module is schedule for installation at the end of November.

Can't count the beams anymore

2026-10-19 - We used to be able to know the number of vacuum vessel modules in the tokamak pit by counting the beams from above. No more. Two radial beams have been removed (on the right) because their support is no longer required. We confirm, the number of modules in the pit is still six.

Not AI generated

2026-10-19 - This remarkable photo of the tokamak pit seems ... almost unreal. In fact, it's taken from the perspective of a port cell that is half-blocked by a vacuum vessel sector module. On the left, you see the outer edge of the module, with part of the toroidal field coil case structure (three round holes) and the sector thermal shield (thin pipes). On the right, you can see into the tokamak pit, where space still remains for future sector modules.

Inspecting the latest arrival

2026-10-18 - Vacuum vessel sector #2, which arrived on 2 October, undergoes visual inspection.

Japan: progress on additional gyrotrons

2026-10-14 - QST Japan, which already supplied 8 gyrotron units to the project on behalf of the Japanese Domestic Agency, has been commissioned by the ITER Organization to supply an additional 20 gyrotron systems for electron cyclotron heating. The first production unit of the additional order has been delivered for testing to the Naka Fusion Institute and is expected at ITER later this year.

Electrical system commissioning activities

2026-10-13 - High-voltage commissioning is underway for the poloidal field coil power conversion system.

Magnet facility: second set of tests completed

2026-10-12 - The magnet cold test facility lid is lifted on Monday 12 October after the successful energization tests of toroidal field coil #17.

Guiding the journal "Nuclear Fusion" into a new era

2026-10-12 - The new editor-in-chief of the journal Nuclear Fusion is ITER scientist Francesca Poli. “As we go into building many more fusion devices than in the last decades, much more research is being done on materials, on technology, and on operation. Nuclear Fusion needs to follow these developments and ensure the applicable research is being published, while also providing some leadership and guidance. This is a direction that the journal had already started and I'm really pushing for us to continue in this direction.”

Looms and loops

2026-10-09 - These workers are unpacking looms and loops for sector #2 diagnostics and instrumentation.

Divertor inner vertical target: first unit completed

2026-10-07 - The first divertor inner target production unit, completed by Research Instruments in Germany this month, is the culmination of more than a decade of development, prototyping and qualification activities coordinated by the European Domestic Agency, Fusion for Energy (F4E). Research Instruments has contracts to produce 28 units in all. © RI

First radial beam removed

2026-10-07 - Radial beams are temporary lifting tools that support and stabilize sector modules throughout their sub-assembly and transfer into the pit. When one is removed, it means that the load of the sector has been transferred to gravity supports and the tokamak’s underlying support system, the crown. Good news for the progression of the tokamak assembly program!

Ceremony for the last core machine component

2026-10-05 - With the delivery on 2 October of vacuum vessel sector #2, by Europe, all of the core tokamak components (cryostat, magnets, vacuum vessel) are on site. At the ceremony held to mark the historic moment, ITER Director-General Pietro Barabaschi takes a moment to marvel at all that has been accomplished.

Last large component delivered

2026-10-05 - Staff and contractors, representatives of the Domestic Agencies and industry, converge for a brief celebration on the worksite on Monday 5 October. The last large component of the ITER machine—vacuum vessel sector #2—has been delivered.