Release of IMAS infrastructure and physics models as open source

2025-12-10 - Sector module #4 is transported by overhead crane into sector sub-assembly tooling. There, it will be associated with its thermal shield and two toroidal field coils, forming a complete "module."

2025-12-10 - Just a few weeks after one of the sector sub-assembly tools is liberated, another sector module (#4) is upended in specialized tooling to replace it. The workers in the photo help us to understand the scale of a vacuum vessel sector, which is as tall as a five-storey building and as heavy as a jetliner.

2025-12-10 - One of the sector sub-assembly tools was freed up last month when sector module #5 was transferred into the pit. This space is now occupied by the next sector in the assembly line: sector #4.

2025-12-09 - The European Domestic Agency, Fusion for Energy, has handed over the ITER Neutral Beam Power Supply buildings to the ITER Organization, marking the completion of a six-year project to build the 11,700 m² area (comprising two steel-frame buildings, pictured above, and one outdoor technical zone) that will house the power supply installation for ITER's neutral beam injectors.

2025-12-08 - The ITER Organization has released the tools it uses for physics modelling and analysis—the ITER Integrated Modelling & Analysis Suite, IMAS—under open-source licenses in another step towards supporting the global efforts to develop fusion energy. See more at https://github.com/iterorganization

2025-12-04 - In yellow are the cartridges that will be used to connect the blanket shield blocks. Many other small attachments (bosses) will be used to route instrumentation cables.

2025-12-04 - Contractors work on the interior surface of the vacuum vessel sectors in the tokamak pit. Three levels of staging allow them to access every nook and cranny.

2025-12-04 - Scenes from tokamak pit, where scaffolding and equipment make it hard to havigate.

2025-12-01 - The traditional holiday tree lighting takes place in the ITER lobby on 1 December. “May the illumination of the tree reflect human warmth and solidarity,” says Elise Placé, the deputy mayor of Saint-Paul-lez-Durance (host to the project).

2025-12-01 - The ability to move experimental data instantly and securely will determine how thousands of researchers participate in near-real time when the machine comes online in the 2030s. This summer, ITER carried out two large-scale data-transfer campaigns (to Japan and the USA) to test the project's international data ecosystem. Read more at: https://www.iter.org/node/20687/iter-demonstrates-fast-data-transfer-japan-and-us

2025-11-29 - 600+ visitors from France and Europe visit the ITER installation on Saturday 29 November. Kevin Ferencz, a 17-year-old aspiring plasma physics student from Hungary, was determined to see the project with his own eyes. “This project is the future!"

2025-11-29 - Hundreds of people had the chance to see the tooling and components involved in machine assembly during an Open Doors Day organized in November. The scale always surprises.

2025-11-29 - Julie Marcillat, organizer of the Open Doors Day, directs visitors to buses to start the tour. More than 70 ITER staff volunteer to work on Saturday 29 November—a day that also mobilizes cleaning crews, security staff, and restaurant personnel.

2025-11-25 - With the first test of a toroidal field coil in ITER's magnet cold test facility, engineers will have the opportunity to test the protection architecture of ITER’s superconducting magnets in high-energy conditions. The architecture uses two types of controllers to monitor thousands of signals related to helium flow, temperature, and pressure (slow controllers) and detect events like electrical arcs or quenches and trigger action (fast controllers).