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Latest ITER Newsline

  • In-vessel electrical systems | What it takes to wire up a fusion reactor

    While the challenges of keeping cables operational in harsh environments such as jet engines and nuclear fission reactors have been understood for a long time, [...]

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  • Assembly preparation | Off goes the lid

    In the summer of 2017, a circular platform was installed inside of the large steel-and-concrete cylinder of the Tokamak pit. The 200-tonne structure was meant t [...]

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  • Deliveries | Two coils on their way

    For the past five years, 'highly exceptional loads' (HEL) have been successfully travelling along the ITER Itinerary to be delivered to the ITER site. As the pr [...]

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  • ITER NOW video | Ready for the big lifts

    This new video in our "ITER NOW" series provides an insider's view of the recent load tests performed as the ITER Organization prepares for the machin [...]

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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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Of Interest

See archived entries

They are building the physics basis for ITER

R.A.

Last week at ITER, the ITPA Coordinating Committee met for the 16th time to review and discuss the experiments performed in 2013 in support of ITER and to examine the proposals for the following year. (Click to view larger version...)
Last week at ITER, the ITPA Coordinating Committee met for the 16th time to review and discuss the experiments performed in 2013 in support of ITER and to examine the proposals for the following year.
For the past 13 years, a group of some 350 physicists throughout the world has been working to integrate knowledge and data for the ITER Project.
 
The International Tokamak Physics Activity (ITPA) was established in 2001 under the auspices of the International Atomic Energy Agency. In 2008, the seven ITPA "Topical Groups" and their Coordinating Committee passed under the umbrella of ITER.
 
Last week at ITER, the ITPA Coordinating Committee met for the 16th time to review and discuss the experiments performed in 2013 in support of ITER and to examine the proposals for the following year.
 
Newsline seized the opportunity to sit with Yutaka Kamada who has chaired the ITPA Coordinating Committee since December 2010. (Dr Abhijit Sen of the  Institute for Plasma Research, India will take over as Chair of the Coordinating Committee on 1 January 2014.)

How does the ITPA work?

ITPA is principally a group of physicists, and some engineers also, working in different fusion labs around the world and contributing to the establishment of a broad physics basis for ITER and what lies beyond — the DEMO project and future industrial fusion power plants.
 
How does this translate concretely?

Presently, ITPA coordinates 56 "joint experiments" in different tokamaks throughout the world. Suppose something interesting happens in ASDEX (Germany) for instance. We'll propose to reproduce it on, for instance, KSTAR (Korea) ... and then we extrapolate to ITER. This is the main idea: scaling towards ITER through extrapolation.

Experiments are not all, however. Theory and simulation play a large role in building knowledge and data into ITER.

Yutaka Kamada, who has chaired the ITPA Coordinating Committee since December 2010, will be succeeded on 1 January 2014 by Abhijit Sen of the Institute for Plasma Research, India. (Click to view larger version...)
Yutaka Kamada, who has chaired the ITPA Coordinating Committee since December 2010, will be succeeded on 1 January 2014 by Abhijit Sen of the Institute for Plasma Research, India.
How do you choose your research priorities?

There are topics with some urgency attached to them and others that are more long-term concerns. The divertor material issue certainly fell into the first category and for two years we concentrated on it, asking the different topical groups to assess the advantages and disadvantages of tungsten. Eventually we recommended the use a tungsten divertor. And in October the ITER STAC agreed with this recommendation, leading the ITER Council, on 20-21 November, to endorse the Director General's proposal to commence ITER operations with a tungsten divertor, rather than a carbon-fibre divertor that would have been replaced during the second phase of operations

Before this, it was ELM control that kept us busy...

What are the present priorities, now that the divertor issue is closed?

In the "urgency" category, it is certainly disruptions. In the longer-term, it is steady-state operation. And of course, continuous physics research, which is our core activity.


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