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  • Divertor | Far more than a fancy ashtray

    It has been likened to the filter of a swimming pool or an oversized ashtray. It has been called alien in shape and hellish in its affinity for heat. But whatev [...]

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  • Council milestone #50 | The way to assembly is open

    Passing an ITER Council milestone is always an achievement. Passing this milestone at this moment is much more than that: it is a demonstration that, despite th [...]

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  • Deliveries | A third magnet ready for transport to ITER

    Three ITER magnets are now in transit to ITER from different points on the globe—two toroidal field magnets and one poloidal field coil. In terms of component w [...]

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  • Heaviest load yet | Europe's coil soon to hit the road

    It's big, it's heavy, it's precious and it's highly symbolic: the toroidal field coil that was unloaded at Marseille industrial harbour on 17 March is the most [...]

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  • Russia's ring coil | Entering the final sequence

    The smallest of ITER's poloidal field coils is entering the final sequence in a long series of activities that transform cable-in-conduit superconductor into a [...]

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Of Interest

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Seeing the neutrons from the divertor perspective

Mike Walsh, Diagnostics Division Head

Anatoly Krasilnikov, head of the Russian Domestic Agency; Daniela Puttman; Michael Walsh, head of the Diagnostic Division; Francoise Flament, head of the Procurement and Contract Division; ITER Director-General Motojima; and Luciano Bertalot and Robin Barnsley from the Diagnostics Division. (Click to view larger version...)
Anatoly Krasilnikov, head of the Russian Domestic Agency; Daniela Puttman; Michael Walsh, head of the Diagnostic Division; Francoise Flament, head of the Procurement and Contract Division; ITER Director-General Motojima; and Luciano Bertalot and Robin Barnsley from the Diagnostics Division.
The first Procurement Arrangement of 2013 was signed last week at ITER by the head of the Russian Domestic Agency, Anatoly Krasilnikov, and ITER Director-General Osamu Motojima for the divertor neutron flux monitoring system. "This represents a large volume of work that has been carried out by the diagnostics teams in Russia and at the ITER Organization and it is my pleasure to be here and make this signature," said Anatoly.

The divertor neutron flux monitoring system, or DNFM for short, is destined to sit at the bottom of the machine in three roughly equally spaced positions around the torus, integrated with the divertor.

This monitoring system uses sensors that provide signals, or counts, when hit by the neutrons produced during fusion reactions. "By knowing this neutron emission," says Luciano Bertalot,  "fusion power can be estimated, providing very important information regarding ITER performance."

The divertor neutron flux monitoring system sitting at the bottom of the torus. Integrated in the divertor, it is designed to provide routine measurements of the neutron emissions. (Click to view larger version...)
The divertor neutron flux monitoring system sitting at the bottom of the torus. Integrated in the divertor, it is designed to provide routine measurements of the neutron emissions.
The diagnostic will have to withstand quite a harsh environment: high neutron flux and nuclear load, high temperatures (up to several hundred degrees), magnetic fields (up to 5 Tesla), and significant electromagnetic noise.

The DNFM will need to be integrated into the divertor modules before they arrive on the ITER site. Since the development of the divertor is well underway, the signing of this Procurement Arrangement is an important milestone in order to maintain the ITER schedule.
 
The divertor neutron flux monitoring system sitting at the bottom of the torus. It is integrated in the divertor and is designed to provide routine measurements of the neutron emissions.



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