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News & Media

Latest ITER Newsline

  • Top management | ITER Council appoints new Director-General

    Convening in an extraordinary session in Paris, the ITER Council has appointed Pietro Barabaschi as the next Director-General of the ITER Organization. Mr Barab [...]

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  • On site | Open Doors for ITER families

    In a first at ITER, the gates of the monumental worksite opened on Saturday 17 September for a family-only Open Doors Day event, reserved for the families of st [...]

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  • Manufacturing | Russia ships four gyrotron sets

    Twenty-four electromagnetic wave generators called gyrotrons are at the heart of electron cyclotron resonance heating—the system on ITER that will ini [...]

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  • Fusion world | Science to resume at Wendelstein 7-X

    Improved equipment on Wendelstein 7-X will permit the stellarator device to achieve new scientific heights in a campaign planned to begin this autumn. Science a [...]

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  • ITER International School | On operation scenarios and control

    The 11th ITER International School concluded successfully in San Diego, USA, on 29 July after five days of lectures and discussions on the development of tokama [...]

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Of Interest

See archived entries

Image of the week

Keeping an eye on the hot (double) pancake

An ITER ring-shaped coil begins its existence as cable-in-conduit conductor, wound into "double pancakes" that are eventually stacked one upon the other to form the winding pack at the core of the finalized coil. At one point in the fabrication process, each individual double pancake must be resin-impregnated in order to ensure its electrical insulation.

Data fed by approximately one hundred sensors is displayed on large screens and closely examined by the Fusion for Energy team responsible for the impregnation of the first of the eight double pancakes required for poloidal field coil #4. (Click to view larger version...)
Data fed by approximately one hundred sensors is displayed on large screens and closely examined by the Fusion for Energy team responsible for the impregnation of the first of the eight double pancakes required for poloidal field coil #4.
The impregnation process is a long and delicate operation: tightly wrapped in insulating fiberglass tape, the double pancake is placed into a leak-tight mould. Several hundred litres of epoxy resin is injected at a temperature of 55-60 °C. As temperature is ramped up and extra pressure applied, the micro spaces inside the winding are filled and the double pancake eventually turns into a massive, rock solid block the colour of burned caramel.

Temperature, the quality of the vacuum inside the mould, and the intensity of the injection pressure must be closely monitored at all times.

In this image, data fed by approximately one hundred sensors is displayed on large screens and closely examined by the European Domestic Agency (Fusion for Energy) team responsible for the impregnation of the first of eight double pancakes required for poloidal field coil #4 (which will be 24 metres in diameter and weigh 350 tonnes).

Three other double pancakes are in various stages of fabrication in the on-site Poloidal Field Coil Winding Facility: one is ready to be impregnated; another is being finalized, and a third is taking shape on the winding table.



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