Subscribe options

Select your newsletters:

Please enter your email address:

@

Your email address will only be used for the purpose of sending you the ITER Organization publication(s) that you have requested. ITER Organization will not transfer your email address or other personal data to any other party or use it for commercial purposes.

If you change your mind, you can easily unsubscribe by clicking the unsubscribe option at the bottom of an email you've received from ITER Organization.

For more information, see our Privacy policy.

News & Media

Latest ITER Newsline

  • Data archiving | Operating in quasi real time

    To accommodate the first real-time system integrated with the ITER control system, new components of the data archiving system have been deployed. Data archivi [...]

    Read more

  • Repairs | Setting the stage for a critical task

    Like in a game of musical chairs—albeit in slow motion and at a massive scale—components in the Assembly Hall are being transferred from one location to another [...]

    Read more

  • Image of the week | There is life on Planet ITER

    Dated April 2023, this new image of the ITER "planet" places the construction site squarely in the middle. One kilometre long, 400 metres wide, the IT [...]

    Read more

  • Deputy Director-General | Luo Delong, Corporate

    Many years later, when the Ministry of Science and Technology assigned him to the ITER Project, Luo Delong was to remember the day when, as a young boy, he read [...]

    Read more

  • Visit | Japanese MEXT Minister tours the installation

    In Japan, a MEXT Minister has a lot on his or her plate: the extensive Ministry is a huge administrative machine whose purview includes education, culture, [...]

    Read more

Of Interest

See archived entries

Pre-compression rings

Six packed and stacked

In a factory not far from ITER, French equipment manufacturer CNIM (Toulon) is working under a contract with Europe's Fusion for Energy to manufacture a set of nine composite rings. These high-tech components—with exceptional tensile strength—will have an important role to play in protecting ITER's toroidal field coils.

The completed pre-compression rings at CNIM, stacked and ready for transport. (Click to view larger version...)
The completed pre-compression rings at CNIM, stacked and ready for transport.
During the estimated 30,000 pulses of the ITER machine, the ITER toroidal field coils and coil structures will be subjected to huge electromagnetic forces, on the order of several hundred meganewtons (MN). Caused by electromagnetic interaction between the toroidal field coil current and the magnetic field generated by the poloidal field coils, these out-of-plane forces will cause stress to the toroidal field coils and, over time, fatigue.

Six pre-compression rings—three at the top and three at the bottom—will hold tightly to the coils with a radial force of 7,000 tonnes per coil, pulling the coils into contact and reducing toroidal tension in the outercoil structures. Three other composite rings will be manufactured as spares.

Six pre-compression rings have been handed over to the ITER Organization and three others are in fabrication at CNIM.

Read the full story on the Fusion for Energy website.


return to the latest published articles