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Dynamics and stability of divertor detachment in H-mode plasmas on JET

A R Field, I Balboa, P Drewelow, J Flanagan, C Guillemaut, J R Harrison, A Huber, V Huber, B Lipschultz, G Matthews2017年Plasma Physics and Controlled FusionIF 2.2出版社

The dynamics and stability of divertor detachment in seeded, type-I, ELMy H-mode plasmas with dominant NBI heating in the JET ITER-like wall device is studied by means of an integrated analysis of diagnostic data from several systems, classifying data relative to the ELM times. It is thereby possible to study the response of the detachment evolution to the control parameters (SOL input power, upstream density and impurity fraction) prevailing during the inter-ELM periods and the effect of ELMs on the detached divertor. A relatively comprehensive overview is achieved, including the interaction with the targets at various stages of the ELM cycle, the role of ELMs in affecting the detachment process and the overall performance of the scenario. The results are consistent with previous studies in devices with an ITER-like, metal wall, with the important advance of distinguishing data from intra- and inter-ELM periods. Operation without significant degradation of the core confinement can be sustained in the presence of strong radiation from the x-point region (MARFE).

日本語訳

JET ITER様壁装置における、シードされたタイプI ELMy Hモードプラズマで、支配的なNBI加熱を伴うダイバータ剥離のダイナミクスと安定性を、複数のシステムからの診断データの統合解析により研究した。これにより、ELM間期に支配的な制御パラメータ(SOL入力パワー、上流密度、不純物割合)に対する剥離進展の応答と、剥離ダイバータに対するELMの効果を研究することが可能となる。ELMサイクルの様々な段階でのターゲットとの相互作用、剥離過程へのELMの役割、およびシナリオ全体の性能を含む、比較的包括的な概要が得られた。結果は、ITER様金属壁を有する装置での先行研究と一致しており、ELM内期間とELM間期間のデータを区別したという重要な進展を伴うものである。コア閉じ込めの顕著な劣化なしに、X点領域(MARFE)からの強い放射を伴う運転を維持できることが示された。

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jet高精度(タイトル一致)iter中精度(概要文一致)

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JETDivertorH-modeDivertor detachment
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