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News & Media

Latest ITER Newsline

  • Plasma-wall interaction | Marseille palace hosts preeminent conference

    Fifty years after the first International Conference on Plasma-Surface Interactions in Magnetic Confinement Devices in 1974, the 26th edition of this much-laude [...]

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  • Public-Private | Birth of a truly global fusion community

    The global fusion landscape is undergoing a profound mutation. In the ambition of harnessing 'the energy of the Sun and stars,' public projects, government or u [...]

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  • Industrial milestone | First cryopump passes all tests

    The serial production of ITER's powerful torus and cryostat cryopumps is progressing at Research Instruments, Germany, on behalf of the European Domestic Agency [...]

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  • Cryoline installation | Ball joints against earthquakes

    In order to reach clients inside the Tokamak Building, cooling fluids produced by the ITER cryoplant flow through many kilometres of highly sophisticated p [...]

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  • The changing fusion landscape | ITER hosting private sector workshop

    Take out your smart phone and search your favourite news site for 'nuclear fusion' or 'fusion energy.' On any given day, you will find articles discussing break [...]

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Of Interest

See archived entries

ITER NEWSLINE -

Fusion world

Record results at KSTAR

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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