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News & Media

Latest ITER Newsline

  • Fusion world | A helium campaign kicks off at JET

    After achieving record-breaking results on the Joint European Torus during 2021 experiments with the high-performance fuel mix of deuterium and tritium, EUROfus [...]

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  • Coil winding table | Seven years of faithful service

    In November 2015, workers from the European contractor Sea Alp Engineering, an Italian company based in Turin, began installing a large circular structure at th [...]

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  • Image of the week | Down under

    It has been close to five months since the first vacuum vessel module was installed in the Tokamak pit. The view from above is by now familiar: a huge D-sha [...]

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  • On site | An annual reminder about safety

    ITER's Safety and Quality Department knows: you can never repeat an important message often enough. The second annual ITER Safety Day took place on 15 Septe [...]

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  • 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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Of Interest

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Manufacturing

Diamond windows in production in Europe

Synthetic diamond windows will play a double function in the ITER machine—allowing the microwaves of the electron cyclotron heating system to pass through to reach the plasma while providing an effective leak-proof vacuum barrier. A contractor to the European Domestic Agency has started production.

Only the best for ITER: high-purity CVD (chemical vapour deposition) diamond windows offer unsurpassed hardness, broad band optical transparency, and extremely high thermal conductivity. © Diamond Materials (Click to view larger version...)
Only the best for ITER: high-purity CVD (chemical vapour deposition) diamond windows offer unsurpassed hardness, broad band optical transparency, and extremely high thermal conductivity. © Diamond Materials
Offering unsurpassed hardness, broad band optical transparency, and extremely high thermal conductivity, synthetic diamonds are the material of choice for 60 small windows that offer access to the machine for the high-frequency electromagnetic waves of ITER's electron cyclotron heating system, yet ensure a tight vacuum boundary.

The European Domestic Agency Fusion for Energy is working with a German contrator, Diamond Materials, for the production of sixty 1.1 mm thick discs with a diameter of 7 cm. Each one requires approximately six months to complete, including tests. The company is currently working at a rate of 7 to 10 discs every four months.

First the sythetic diamonds are "baked" in one of the company's 40 furnaces, a process that requires two months. Then the diamond is separated from its substrate, shaped to ITER specifications, and polished before its quality gets confirmed through optical testing.

See the full article on the Fusion for Energy website.

 



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