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Integration of a radiative divertor for heat load control into JET high triangularity ELMy H-mode plasmas

C. Giroud, G. Maddison, K. McCormick, M.N.A. Beurskens, S. Brezinsek, S. Devaux, T. Eich, L. Frassinetti, W. Fundamenski, M. Groth2012年被引用 59Nuclear FusionIF 3出版社

Experiments on JET with a carbon-fibre composite wall have explored the reduction of steady-state power load in an ELMy H-mode scenario at high Greenwald fraction ∼0.8, constant power and close to the L to H transition. This paper reports a systematic study of power load reduction due to the effect of fuelling in combination with seeding over a wide range of pedestal density ((4–8) × 1019 m−3) with detailed documentation of divertor, pedestal and main plasma conditions, as well as a comparative study of two extrinsic impurity nitrogen and neon. It also reports the impact of steady-state power load reduction on the overall plasma behaviour, as well as possible control parameters to increase fuel purity. Conditions from attached to fully detached divertor were obtained during this study. These experiments provide reference plasmas for comparison with a future JET Be first wall and an all W divertor where the power load reduction is mandatory for operation.

日本語訳

炭素繊維複合材壁を備えたJETでの実験では、高いグリーンワルド比∼0.8、一定パワー、L-H遷移に近い条件下でのELMy Hモードシナリオにおける定常状態の電力負荷低減を調査した。本論文は、ペデスタル密度の広い範囲((4–8) × 10¹⁹ m⁻³)にわたる燃料供給とシーディングの組み合わせ効果による電力負荷低減の系統的研究を報告し、ダイバータ、ペデスタル、および主プラズマ条件の詳細な記録に加え、2種類の外部不純物である窒素とネオンの比較研究も報告する。また、定常状態の電力負荷低減が全体的なプラズマ挙動に及ぼす影響、および燃料純度を高めるための可能な制御パラメータについても報告する。本研究では、アタッチ状態から完全デタッチ状態のダイバータまでの条件が得られた。これらの実験は、電力負荷低減が運転に必須である将来のJET Be第一壁および全Wダイバータとの比較のための参照プラズマを提供する。

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jet高精度(タイトル一致)

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JETDivertorEdge localized modeH-modeHeat loadTriangularityELMy H-mode
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