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  • Magnet system | A set of spares for the long journey

    In about five years, ITER will embark on a long journey through largely uncharted territory. Conditions will be harsh and—despite all the calculations, modellin [...]

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  • People | A new generation of Monaco-ITER Fellows

    The seventh group of Monaco Fellows has joined ITER with funding from a longstanding partnership between the Principality of Monaco and the ITER Organization. T [...]

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  • Integrated commissioning | The last step before plasma operations

    ITER's approach to commissioning makes a clear distinction between system commissioning and integrated commissioning. Integrated commissioning is a carefully or [...]

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  • Central solenoid | First module ships

    Having successfully completed an overland journey of 2,400 kilometres, central solenoid module #1 is now on its way across the Atlantic.   Safely secured i [...]

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  • Image of the week | First central solenoid module on its way

    It's a long way from San Diego to Houston. From the Pacific shores to the Gulf of Mexico, the road stretches approximately 2,400 kilometres through Southern Cal [...]

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Of Interest

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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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