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  • A world in itself

    From a height of some 50 metres, you have the entire ITER worksite at your feet. The long rectangle of the Diagnostics Building stands out in the centre, with [...]

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  • US completes toroidal field deliveries for ITER

    The US Domestic Agency achieved a major milestone in February by completing the delivery of all US-supplied toroidal field conductor to the European toroidal fi [...]

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  • Thin diagnostic coils to be fitted into giant magnets

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  • Addressing the challenge of plasma disruptions

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  • Blending (almost) seamlessly into the landscape

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Winding completed on first central solenoid module

-US ITER

The final turns of the first central solenoid module on the winding table at General Atomics. Photo: GA (Click to view larger version...)
The final turns of the first central solenoid module on the winding table at General Atomics. Photo: GA
The US Domestic Agency and vendor General Atomics completed a major milestone on 6 April by winding the first module for the ITER central solenoid. The feat was accomplished at the General Atomics Magnet Development Facility in Poway, California.

Each central solenoid module is fabricated from approximately 6,000 metres of niobium-tin (Nb3Sn) conductor, supplied by Japan in seven spools. The central solenoid, a giant electromagnet considered the "heartbeat of ITER," will consist of six stacked modules surrounded by a support structure.  When assembled, the entire 13 Tesla central solenoid and associated structures will be 13 metres tall and weigh 1,000 metric tons.

Conductor from six spools is wound to form six separate hexapancakes (6 layers) containing 14 turns. The seventh spool is wound to form a quadpancake (4 layers) containing 14 turns.

After winding, the completed hexapancakes and quadpancake will be stacked and joined prior to heat treatment, insulation, vacuum pressure impregnation, and final testing.


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