ITER magnets | 400-tonne coil taking shape in China

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

  • Cryodistribution | Blowing cold and hot

    If the cryodistribution system were a railroad, the cryogenic termination cold box would be its main switch. A massive structure packed with pipes, valves, elec [...]

    Read more

  • Pre-assembly activities | Captured from on high

    With assembly tools standing 22 metres tall, massive bridge cranes straddling the width of the building, and alien-shaped components placed at regular intervals [...]

    Read more

  • 27th ITER Council | Assembly moves ahead

    The Twenty-Seventh Meeting of the ITER Council took place by videoconference on 18 and 19 November 2020, chaired by LUO Delong from China. Representat [...]

    Read more

  • Fusion world | Translating JET into ITER

    With an inner wall made of beryllium and tungsten, the European tokamak JET is the only tokamak in the world to share the same material environment as ITER. Whe [...]

    Read more

  • Worksite | Major progress you don't see from the air

    There was a time when aerial pictures of the ITER worksite taken at six-month intervals showed spectacular change. Buildings and structures sprouted from previo [...]

    Read more

Of Interest

See archived entries

ITER magnets

400-tonne coil taking shape in China

The first poloidal field coil to be installed during the ITER machine assembly phase may be one of the smallest in terms of lateral dimensions, but it tops out its five sister coils in weight due to the number of stacked layers (or double pancakes) that go into its construction. 

A double pancake for poloidal field coil #6 (PF6) undergoes impregnation at the Institute of Plasma Physics of the Chinese Academy of Sciences (ASIPP) in Hefei, China. (Click to view larger version...)
A double pancake for poloidal field coil #6 (PF6) undergoes impregnation at the Institute of Plasma Physics of the Chinese Academy of Sciences (ASIPP) in Hefei, China.
At the Institute of Plasma Physics of the Chinese Academy of Sciences (ASIPP) in Hefei, China, an 80-person team is involved in the fabrication of poloidal field coil #6 (PF6) on behalf of the European Domestic Agency*.

Each poloidal field coil is unique. Depending on the number of double pancakes (the building block of the coil) stacked to form the final assembly and the number of "turns" in each layer, ITER's poloidal field coils vary in weight from 193 tonnes (PF1) to 396 tonnes (PF6), and in diameter from 9 metres (PF1) to 24 metres (PF3 and PF4).

The sixth coil is the only one of the poloidal field set with nine double pancakes, compared to six or eight for the others. It also has double the number of spiral-like turns of the similar-sized PF1—meaning that more conductor is required. Finally, the clamp arrangement for the assembled PF6 coil will be heavier than the others due to an exceptionally thick bottom plate.

By September of this year, the contractor expects to have completed the fabrication process for the nine double pancakes—including winding, impregnation, and the creation of helium and electrical joints.

This will open the way to final assembly activities on the 10-metre-in-diameter coil, such as stacking, joining, ground insulation and final impregnation.

Please see the full report on the European Domestic Agency website.

*The second-smallest ring magnet for ITER is being fabricated in China on the basis of an agreement concluded with the European Domestic Agency.


return to the latest published articles