Subscribe options

Select your newsletters:

Please enter your email address:

@

News & Media

Latest ITER Newsline

  • Port cells | All 46 doors in place

    In ITER, ordinary objects and features often take on an awesome dimension. Take the doors that seal off the port cells around the Tokamak for instance. Doors th [...]

    Read more

  • Toroidal field coils | Two make a pair

    One of the essential 'building blocks' of the ITER Tokamak is the pre-assembly of two toroidal field coils, one vacuum vessel sector and corresponding panels of [...]

    Read more

  • Industrial milestone | Cryostat manufacturing comes to an end in India

    With a flag-off ceremony on 30 June, India's L&T Heavy Engineering marked the end of an eight-year industrial adventure—the manufacturing of the ITER cryost [...]

    Read more

  • Local partners | A celebration for ITER's "vital artery"

    ITER is made possible through the work of thousands of scientists, engineers, workers of all trades and industries across the globe. It is also made possible by [...]

    Read more

  • Photo reportage | Travelling with a coil

    From the salt marshes of the inland sea Étang-de-Berre to the rolling hills around the ITER site (with a view of some of the highest alpine summits) an ITER con [...]

    Read more

Of Interest

See archived entries

Poloidal field coil #6

459th (and last) turn

More than 12 kilometres of niobium-titanium superconductor have been successfully wound into the nine double pancake windings for poloidal field coil #6 (PF6), the first of the ring magnets expected on site for assembly into the ITER machine.

Nine of these double pancake windings will be stacked, joined and insulated to form the final PF6 coil assembly. Late June, ASIPP and the European Domestic Agency celebrated the completion of the first step in the fabrication process—coil winding. (Click to view larger version...)
Nine of these double pancake windings will be stacked, joined and insulated to form the final PF6 coil assembly. Late June, ASIPP and the European Domestic Agency celebrated the completion of the first step in the fabrication process—coil winding.
At the Institute of Plasma Physics of the Chinese Academy of Sciences (ASIPP), in Hefei, teams have been at work since February 2016 on the fabrication of ITER's bottommost ring-shaped coil. From the successful completion of qualification windings through the serial production of the nine double-layered "pancakes" that make up the core of the magnet, it has been a long and technically challenging journey.

Poloidal field coil #6 (PF6) is being fabricated in China under an agreement signed between ASIPP and the procuring party, the European Domestic Agency. The magnet is due for delivery on site in mid-2019.

The winding of each double pancake involves the integration of two superconducting cable lengths into a spiralled, circular assembly of rigorously controlled dimensions. Each turn of superconductor is electrically insulated from the adjacent turn with layers of Kapton and fibreglass tapes, and inlets are created for the flow of liquid helium.

If you multiply the number of conductor layers (18, or nine double pancakes) by the number of spirals in each layer (25.5), that's 459 turns around the winding table.

Late June, ASIPP and the European Domestic Agency celebrated the completion of the ninth of nine double pancakes. The next step in the process—the impregnation of each double pancake with resin—should be completed at the end of this month, paving the way for the stacking of the different layers into the final coil assembly. After a final round of ground insulation and impregnation the completed coil will be shipped to the ITER site in France, where European contractors are winding poloidal field coils 2, 3, 4, and 5 and where a cold testing facility has been installed for the final testing of the coils at low temperature.

Please see the report on the European Domestic Agency website.



return to the latest published articles