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Redundancy achieved: spare solenoid module arrives at ITER

As the last highly exceptional load from the United States, the transport of the solenoid module was a momentous occasion carried out with the usual high-level logistics, rigorous security… and respect for frogs.

A novel way of measuring fusion power

The fusion of hydrogen isotopes deuterium (D) and tritium (T) acts predictably most of the time, producing a helium atom and a neutron that is released at high speed. Yet every once in a while—if only for an instant—DT...

Closing the lid, testing the juice

A view of magnet cold test facility progress.

Compendium of ITER design principles taking shape

The first chapters of the ITER Engineering Basis Handbook , Volume 1, have been released and more will follow soon.

ITER’s 3rd Public-Private Fusion Workshop

For the past two years, ITER has opened its doors to private sector fusion companies for joint workshops on areas of mutual interest and mechanisms for positive engagement. This year’s workshop will take place on 28 and...

Blue goo, good to go

With a final dollop of vibrant Smurf-blue goo, another penetration benchmark was reached in December—the infilling of 15 busbar openings on the L3 and L4 levels of the Tokamak Building.

The ITPA adds a letter

In December, the International Tokamak Physics Activity (ITPA) became the International Tokamak Physics and Engineering Activity (ITPEA).

Making sure ITER is ready for operation

As the project advances toward the construction and operational objectives defined in Baseline 2024, integrated commissioning has become increasingly central to ensuring ITER’s success.

ITER 2026 Postdoctoral Fellowships announced

Recruitment opens today for eight Postdoctoral Fellowships at the ITER Organization.

In 2025, photographers found an endless source of inspiration in ITER

Whether professional, enthusiast, or occasional, photographers find an endless source of inspiration at ITER. On the worksite or inside the construction buildings, people at work, tools, components, light, reflections...

First coil ready to face deep-space cold

For toroidal field coil #7 (TF07 ) , winter will be short but exceedingly harsh. For one full month, the ~ 300-tonne component will be enclosed in a steel cocoon, its temperature brought down to 4 K ( minus 269 degrees...

3 cold valve boxes for neutral beam heating

Cold valve boxes are compact yet highly complex assemblies that regulate the flow of supercritical helium to the ITER cryopumps. Eight units are required for the large cryopumps that will establish the vacuum conditions...

Keeping the project humming

At the sixth annual ITER Awards ceremony last week, six prizes were presented to teams and individuals in recognition of outstanding project execution in 2025. The ITER Director-General also took the opportunity to...

A giant, slow-motion game of musical chairs

One component leaves sector sub-assembly tooling, another arrives ... the intricately coordinated transfers of large components in the ITER Assembly Hall resemble a slow-moving game of musical chairs.

Reaching target position is a 5-day operation

Each of the nine sector modules that form ITER’s plasma chamber is approximately 13 metres tall and, once rid of its lifting rig, weighs in excess of 1,200 tonnes. In terms of height, this is the equivalent of a five...

How ITER quantifies fusion power

To prove fusion ’ s promise, ITER must not only create energy—it must also measure it with great precision.

Release of IMAS infrastructure and physics models as open source

In another step to support global efforts to develop fusion energy, the ITER Organization is releasing the tools it uses for physics modelling and analysis—the ITER Integrated Modelling & Analysis Suite, IMAS—under open...

Wendelstein 7-X: ten years of world-leading fusion research

The team at the Max Planck Institute for Plasma Physics in Greifswald, Germany, is celebrating ten years of science on the Wendelstein 7-X stellarator.

Witnesses to history

Fusion energy has been inspiring people to dream big for decades and this passion was on full display at ITER Open Doors Day this weekend as more than 600 people came from across France and Europe to visit the site.

Celebrating "human warmth and solidarity"

As part of a long holiday tradition at ITER, more than 150 people gathered in the headquarters lobby for carols, cookies, and the annual lighting of the Christmas tree.