Subscribe options

Select your newsletters:

Please enter your email address:

@

News & Media

Latest ITER Newsline

  • Cryolines | Another day, another spool

    Having wedged his body and equipment into the cramped space between the ceiling and the massive pipe, a worker is busy welding two cryolines spools. A few metre [...]

    Read more

  • Image of the week | Bearings unveiled

    The construction teams are in the last stages of preparing the Tokamak pit for the first major operation of ITER machine assembly: the lowering of the cryostat [...]

    Read more

  • Technology | Perfecting tritium breeding for DEMO and beyond

    While ITER will never breed tritium for its own consumption, it will test breeding blanket concepts—the tools and techniques that designers of future DEMO react [...]

    Read more

  • Fusion world | Japan and Europe complete the assembly of JT-60SA

    The JT-60SA fusion experiment in Naka, Japan, is designed to explore advanced plasma physics in support of the operation of ITER and next-phase devices. After s [...]

    Read more

  • Manufacturing | Thermal shield milestone in Korea

    Six years after the start of fabrication, Korean contractor SFA has completed the last 40° sector of vacuum vessel thermal shield. The stainless steel panels, c [...]

    Read more

Of Interest

See archived entries

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.



return to the latest published articles