Subscribe options

Select your newsletters:


Please enter your email address:

@

News & Media

Latest ITER Newsline

  • Heating | A pinch of moondust in the ITER plasma

    One day in the distant future, fusion plants might be fuelled by helium 3—an isotope that is extremely scarce on Earth but reputed to be abundant on the Moon. B [...]

    Read more

  • Delivery | 2,000 km through canals, locks and tunnels

    When the thruway is closed, one takes the back roads. And when it's low-water season on the Rhine-Rhône canal, a barge leaving Switzerland for the Mediterranean [...]

    Read more

  • Monaco Fellows | A hand in shaping ITER

    For the sixth time, ITER is welcoming a group of five young researchers as part of the Monaco-ITER postdoctoral fellowship scheme. Working alongside experienced [...]

    Read more

  • On site | Drone survey on a perfect day

    There are days in winter when the skies over Provence are perfectly transparent. Snowy peaks 200 kilometres away appear close enough to be touched and farms, co [...]

    Read more

  • AAAS conference | ITER on the world science stage

    With more than 120,000 members globally, the American Association for the Advancement of Science (AAAS) is billed as the world's largest scientific society. The [...]

    Read more

Of Interest

See archived entries

Conductors for 6 out of 18 toroidal field coils manufactured

Sabina Griffith

From the 330 tonnes of Nb3Sn strands that have been manufactured, conductors for six toroidal field coils have been produced. (Click to view larger version...)
From the 330 tonnes of Nb3Sn strands that have been manufactured, conductors for six toroidal field coils have been produced.
The production of superconducting cables for ITER's large and powerful toroidal field coils is making remarkable progress: as of today, 330 tonnes of strands made out of Nb3Sn, a special alloy made of niobium and tin, have been produced in factories in China, Europe, Japan, Korea, Russia and the United States. In the pre-ITER world, global production was 15 tonnes a year. "The current production status represents 75 percent of the total toroidal field strands required for ITER," reports Arnaud Devred, Section Leader for Superconducting Systems. "Out of these strands, conductors for 6 out of the machine's 18 toroidal field coils have been produced."

The 18 toroidal field coils will produce a magnetic field around the ITER torus helping to confine and control the plasma inside. The coils are designed to achieve operation at magnetic fields up to 13 Tesla. They are made of cable-in-conduit superconductors in which a bundle of superconducting strands is cabled together and contained in a structural jacket. Unit lengths of theses cables—measuring 760 metres or 415 metres depending on their position within the coil—are then spooled into a D-shaped double spiral called a "double pancake," giving the structure the characteristic shape of ITER's toroidal field coils.

As of today, a total of thirty 760-metre unit lengths and thirteen 415-metre unit lengths have been manufactured by the procuring agencies in Japan, Korea, Russia and Europe, adding up to the material required for 6 of the 18 toroidal field coils.

"Quality tests are currently underway," says Devred, "to confirm that these unit lengths can be accepted for coil winding."


return to the latest published articles