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

  • Cryostat thermal shield | A "strong back" for a fragile component

    The lower cylinder thermal shield is a large silver-plated component, circular in shape and five metres tall, which fits inside the depression in the cryostat b [...]

    Read more

  • Diagnostic shielding | B4C ceramic bricks prove their worth

    A number of materials can effectively shield diagnostic equipment from the neutron flux coming from the plasma. To find the best one, the diagnostics team at IT [...]

    Read more

  • Image of the week | The cryostat top lid, batch after batch

    Batch after batch, the elements for the top lid of the ITER cryostat keep arriving from India. As of today, 7 out of the 12 required segments have been delivere [...]

    Read more

  • Cooling water system | The tanks within a tank

    Deep inside the bowels of the Tokamak Building, the entrance to one of most spectacular rooms of the whole installation resembles that of a broom cupboard. [...]

    Read more

  • ITER assembly | Last major assembly contract signed

    One year after finalizing two major machine assembly contracts, the ITER Organization has chosen the contractors who will carry out assembly and installation ac [...]

    Read more

Of Interest

See archived entries

Major assembly progress on JT-60SA fusion device

Nine sectors (340 degrees) of the JT-60SA vacuum vessel have been assembled and welded. Eighteen toroidal field coils will now be manoeuvred into place before the vessel is closed up. (Click to view larger version...)
Nine sectors (340 degrees) of the JT-60SA vacuum vessel have been assembled and welded. Eighteen toroidal field coils will now be manoeuvred into place before the vessel is closed up.
The JT-60SA fusion experiment in Naka, Japan, is designed to support the operation of ITER and to investigate how best to optimize the operation of fusion power plants that are built after ITER.

It is a joint international research and development project involving Japan and Europe, using infrastructure of the existing JT-60 Upgrade experiment. SA stands for "super, advanced," since the experiment will have superconducting coils and study advanced modes of plasma operation. This satellite tokamak program was established in 1997 as one of three joint projects between Europe and Japan within the Broader Approach Agreement.

Construction has been underway since January 2013. In the last few months, major assembly milestones have been reported by the European Domestic Agency, including the completion of vacuum vessel assembly and the installation of the machine's cryogenic system.

The vacuum vessel, with a diameter of 10 metres and a height of 6.6 metres, is made of ten sectors that are welded together within strict tolerances of a few millimetres only. Assembly work began in 2013 and was completed recently. Only one sector remains to be welded; before this, 18 toroidal field coils must be manoeuvred into place.

In JT-60SA's cryogenic hall, the large refrigeration cold box (which cools the helium) and the auxiliary cold box (which distributes and controls helium flows) are in place. (Click to view larger version...)
In JT-60SA's cryogenic hall, the large refrigeration cold box (which cools the helium) and the auxiliary cold box (which distributes and controls helium flows) are in place.
Installation of the cryogenic system has also been completed. JT-60SA's cryogenic system, with an equivalent refrigeration capacity of 9 kW at 4.5 K (-269 degrees C), will use helium to cool the superconducting magnets, thermal shields, and cryopumps.  Part of the European in-kind contributions to the JT-60SA project, the cryogenic system was a voluntary contribution from France. The European agency collaborated with CEA (the French Alternative Energies and Atomic Energy Commission) to develop the preliminary design and specifications; in November 2013 CEA contracted the detailed design, manufacturing, installation and commissioning of this system to Air Liquide Advanced Technology in Sassenage, France.

 
Read the full reports issued by the European Domestic Agency on JT-60SA's vacuum vessel assembly and cryogenic system installation.


return to the latest published articles