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News & Media

Latest ITER Newsline

  • Neutral beam injection | How ELISE is contributing to ITER

    ITER's neutral beam injection system is based on a radio frequency source that has been the subject of decades of development in Europe. At Max Planck Institute [...]

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  • Image of the week | Almost there

    The Tokamak Building has reached its maximum height ... in terms of concrete that is. The 'jewel box' in reinforced concrete will grow no more; instead, it will [...]

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  • Powerful lasers | A mockup to demonstrate safety

    During ITER operation, high-powered lasers will gather important diagnostic information on the properties and behaviour of the plasma, such as density, temperat [...]

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  • Cryostat | Lower cylinder revealed

    They were all there: those who designed it, those who forged it, those who assembled and welded it, and those who closely monitored the requirements and procedu [...]

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  • Europe's DEMO | What it could be like

    It looks like ITER, feels like ITER, but it's not ITER. In this depiction of what the site layout for the next-step fusion machine, DEMO, might look like in Eur [...]

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Of Interest

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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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