Subscribe options

Select your newsletters:


Please enter your email address:

@

News & Media

Latest ITER Newsline

  • Cryolines | Not just any pipes

    In order to produce and sustain plasmas ten times hotter than the core of the Sun, some essential elements of the ITER machine need to be cooled to temperatures [...]

    Read more

  • Symposium in Japan | Fusion attracts strong political support

    A recent symposium in Japan on fusion energy attracted 500 participants. The Fusion Energy Forum of Japan was established in 2002 for the purpose of promoting [...]

    Read more

  • Fiction | "Steampunk" fusion machine travels in time

    Ever since a 'Mr Fusion' device appeared on Doc's time-travelling DeLorean in the first opus of the Back to the Future trilogy (1985), fusion energy has exerted [...]

    Read more

  • Construction | Honouring the crown mockup

    Medieval stone masons used to engrave their personal mark on the walls and pillars of the cathedrals they contributed to building. Their present-day counterpart [...]

    Read more

  • Neutral beam diagnostics | Right in the line of the beam

    A high-precision diagnostic is about to enter into service at the ITER Neutral Beam Test Facility, where scientists are testing key aspects of ITER's external h [...]

    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