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

  • On site | 28 who "truly shined"

    The new ITER Star Awards recognize exemplary performance and commitment. Every year, during the annual assessment campaign, ITER staff may be recognized for exe [...]

    Read more

  • MT-28 Conference | Superconducting magnets as a catalyst

    Many passers-by paused for a moment and picked up their cell phones to capture the scene. It was indeed rare to see dancers on the square outside of the Pavillo [...]

    Read more

  • Fusion world | TCV tokamak turns 30

    The Swiss TCV tokamak (for Tokamak à Configuration Variable, or 'variable configuration' tokamak) has been exploring the physics of nuclear fusion for 30 years [...]

    Read more

  • Image of the week | Port cell with a view

    A visit to ITER would not be complete without a peek into the Tokamak pit where the machine is being progressively assembled. For several years, one of the equa [...]

    Read more

  • Visit | Chinese Minister reaffirms "full support"

    ITER Director-General Pietro Barabaschi and the Chinese Minister of Science and Technology (MOST) Wang Zhigang share a common academic background. They both tra [...]

    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