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News & Media

Latest ITER Newsline

  • Making remote handling less remote

    Over a wet and windy three-day period on the ITER site in November, around 90 representatives of the ITER Organization, the Domestic Agencies of Europe and Japa [...]

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  • The framework for sharing ITER intellectual property

    In signing the ITER Agreement in 2006, the seven ITER Members were agreeing not only to share in the costs of constructing and operating the ITER facility, but [...]

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  • Wendelstein achieves ultra-precise magnetic topology

    A recent article in the online journal Nature Communications confirms that the complex topology of the magnetic field of Wendelstein 7-X—the world's largest ste [...]

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  • The Matrix, rigid and fluid

    A fast-growing array of structures and buildings has been emerging across the ITER worksite platform under the control and supervision of the European Domestic [...]

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  • By road, river and sea

    They travelled by road from the Air Liquide factory near Grenoble, sailed down the Rhône River from Lyon and entered the Mediterranean to the east of Fos-sur-Me [...]

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Of Interest

See archived articles

Armed and ready to identify leaks

A collaborative success: The ITER vacuum team poses in the basement storage room in Headquarters where the leak detection devices shipped in from the US are piling up. (Click to view larger version...)
A collaborative success: The ITER vacuum team poses in the basement storage room in Headquarters where the leak detection devices shipped in from the US are piling up.
In constructing ITER, one of the key challenges is to ensure a leak-free machine. The US Domestic Agency has recently completed the bulk of delivery for the test equipment required to confirm the vacuum leak-tightness of components as they arrive on site and during the construction of the machine. At right,  vacuum team members are pictured with some of the leak detection tools-of-the-trade: helium spray guns and highly sensitive mass spectrometer-based detectors.

"This procurement is the very first US ITER procurement to be delivered to the ITER site," rejoices Mike Hechler, the responsible officer within the US vacuum team. "Hence it should be celebrated as a real success. Being first we were like guinea pigs having to sort out how to deal with transport, VAT charges, customs, CE marking. It was not easy, but opens up the way for future US deliveries."

"The basic method of leak detection is simple," explains Liam Worth, member of the ITER vacuum team  and responsible for the test program. "You evacuate your vacuum vessel, surround it with helium gas, and then use the leak detector to look for helium leaking in—these instruments can detect in the minutest quantities." However the size, complexity and number of the ITER vacuum systems make this a far from simple task. "We estimate that from acceptance to the final commissioning of the machine, no fewer than 94 man-years of vacuum testing will have to be performed."


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