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News & Media

Latest ITER Newsline

  • Towards DEMO | What will the blanket teach us?

    We often hear about the scientific ideas ITER is designed to confirm, but the project also has an important role as a technology demonstrator. The blanket is a [...]

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  • Summer works | A new chapter opens

    Notice anything? Yes, the giant poster (25 x 50 m) on the temporary wall of the Assembly Hall has been removed. Displaying a cutaway of the ITER Tokamak, it had [...]

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  • Image of the week | On the thruway from Hefei to Shanghai

    Over the next four years, China will be shipping approximately 100 large components for the magnet feeder system, adding up to 1,600 tonnes of equipment in all. [...]

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  • India | Modi praises ITER at UNESCO

    In August, while on official visit to France at the invitation of President Emmanuel Macron, Prime Minister Narendra Modi of India shared his vision of cooperat [...]

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  • Vacuum technology | Record-breaking sealing performance

    The ITER vacuum vessel, its ports and port extensions, and port plugs all provide the vacuum boundary and first safety confinement barrier of the ITER machine. [...]

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Of Interest

See archived entries

Fusion world

Record results at KSTAR

Alberto Loarte, Confinement & Modelling Section Leader

Through long-pulse operation, the Korean tokamak KSTAR is capable of contributing to the investigation of the plasma physics of ITER, and future steady-state fusion power plants. (Click to view larger version...)
Through long-pulse operation, the Korean tokamak KSTAR is capable of contributing to the investigation of the plasma physics of ITER, and future steady-state fusion power plants.
Experiments in the Korean tokamak KSTAR in 2017 achieved record-length periods of ELM suppression by the application of three-dimensional magnetic fields with internal coils, which is the same approach for ELM control in ITER.

Edge localized modes (ELMs), which can occur during high-performance operation mode (H-mode), expel bursts of energy and particles from the plasma. The energy released can cause erosion in surrounding material, with potential impact on the lifetime of plasma-facing materials.

The new KSTAR results demonstrate the robustness of the ELM control scheme adopted for ITER. They have also provided interesting information regarding the influence of the effects of the plasma shape on the robustness of this scheme for its practical application in ITER.

In addition, robust ELM suppression has been obtained in KSTAR with 3D magnetic fields with one and two symmetry periods  in the toroidal direction (n = 1, 2) over a range of plasma currents and toroidal fields, whose ratios corresponds to the expected range for long-pulse operation in ITER (burns of 1,000 to 3,000 seconds). This indicates that there might be more flexibility regarding the shape of the 3D magnetic field that needs to be applied for ELM control in the ITER long-pulse scenarios than previously considered.


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