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

  • Test facility | How do electronics react to magnetic fields?

    A tokamak is basically a magnetic cage designed to confine, shape and control the super-hot plasmas that make fusion reactions possible. Inside the ITER Tokamak [...]

    Read more

  • ITER Robots | No two alike

    More than 500 students took part in the latest ITER Robots challenge. Working from the same instructions and technical specifications, they had worked in teams [...]

    Read more

  • 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

Of Interest

See archived entries

Cryostat lower cylinder: readied for welding

It is one thing to know that the cryostat will be 30 metres high and 30 metres in diameter; it is another to see these dimensions translated into reality.

Tier one of the cryostat lower cylinder is now assembled and readied for welding. Standing on the scaffolding of the sub-component, which is 30 metres in diameter, workers appear tiny. (Click to view larger version...)
Tier one of the cryostat lower cylinder is now assembled and readied for welding. Standing on the scaffolding of the sub-component, which is 30 metres in diameter, workers appear tiny.
In the Cryostat Workshop, as the first tier of the component's lower cylinder is now assembled and readied for welding, the vision is awesome. Look at how tiny the men standing on the scaffolding at the far end appear ...

And imagine how it will feel when tier two is added, effectively doubling the height. The whole section will be more than 10 metres high and the workers will appear even smaller.

The six 60-degree segments, each weighing approximately 40 tonnes, are now precisely positioned, but their alignment must be fine-tuned before welding operations can begin.

In order to reach the required precision in positioning the sectors, the most sophisticated technologies alternate with the most basic tools. ITER cryostat engineer Guillaume Vitupier is seen here next to the manual screw jacks used to fine-tune the segments' alignment. (Click to view larger version...)
In order to reach the required precision in positioning the sectors, the most sophisticated technologies alternate with the most basic tools. ITER cryostat engineer Guillaume Vitupier is seen here next to the manual screw jacks used to fine-tune the segments' alignment.
As is often the case with ITER components, the techniques involved alternate between the most sophisticated technologies (like laser tracking) and the most basic tools — manual screw jacks, chain slings and winches that will be used to correct the segment profiles and achieve the required sub-millimetre precision.

Once the long and complex alignment operations are finalized, welding will begin. The six 5-metre-high weld gaps between the segments will be filled and tier one of the cryostat lower cylinder will be complete.

Similar operations will be performed on tier two, whose six sectors are due to leave India in mid-September.

Once the lower cylinder segment is complete (tier one and tier two), it will be encased in an airtight cocoon and, pending assembly, stored in a dedicated area adjacent to the Cryostat Workshop.


return to the latest published articles