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  • Magnet system | A set of spares for the long journey

    In about five years, ITER will embark on a long journey through largely uncharted territory. Conditions will be harsh and—despite all the calculations, modellin [...]

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  • People | A new generation of Monaco-ITER Fellows

    The seventh group of Monaco Fellows has joined ITER with funding from a longstanding partnership between the Principality of Monaco and the ITER Organization. T [...]

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  • Integrated commissioning | The last step before plasma operations

    ITER's approach to commissioning makes a clear distinction between system commissioning and integrated commissioning. Integrated commissioning is a carefully or [...]

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  • Central solenoid | First module ships

    Having successfully completed an overland journey of 2,400 kilometres, central solenoid module #1 is now on its way across the Atlantic.   Safely secured i [...]

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  • Image of the week | First central solenoid module on its way

    It's a long way from San Diego to Houston. From the Pacific shores to the Gulf of Mexico, the road stretches approximately 2,400 kilometres through Southern Cal [...]

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Of Interest

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Image of the week

The shine of silver

All ITER components are precious. But some look more precious than others.

The vacuum vessel thermal shield comprises nine 40° sectors. Sector #6 is pictured here, ready to be packed and shipped to ITER. (Click to view larger version...)
The vacuum vessel thermal shield comprises nine 40° sectors. Sector #6 is pictured here, ready to be packed and shipped to ITER.
A vacuum vessel sector, a toroidal field coil, a cryopump, or a divertor cassette are priceless pieces of high technology. But they could hardly pass for jewelry.

The thermal shield could. Because its mission is to protect the tokamak's superconducting coils from thermal radiation, it is coated with the most efficient of "low-emissivity" materials. And this material happens to be ... silver.

Given the size of the thermal shield (approximately 2,000 square metres), a 5- to 10-micrometre-thick silver plating on both sides requires no less than 5 tonnes¹ of the precious metal—enough to make 625,000 sterling silver rings.

A first finalized sector of the vacuum vessel thermal shield (sector #6) has left the SFA Engineering Corp in Changwon, Korea, to be delivered to ITER.

¹Five tonnes of silver will be required in the electroplating baths. The mass of silver coating the thermal shield panels is estimated at just under 800 kg total.



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