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An overview of MHD activity at the termination of JET hot ion H modes

M.F.F. Nave, P. Smeulders, T.C. Hender, P.J. Lomas, B. Alper, P. Bak, B. Balet, J.P. Christiansen, S. Clement, H.P.L. De Esch1997年被引用 31Nuclear FusionIF 3出版社

In nearly all hot ion H modes in JET, a magnetohydrodynamic (MHD) event is clearly observed just before the time the stored plasma energy saturates and the neutron yield starts to decline. The results of a systematic analysis of MHD observations for a large number of discharges is reported. The relationship between MHD phenomena and the onset of confinement limitation is discussed, as are aspects of the three main types of performance limiting MHD: (a) low-n modes in the outer regions of the plasma, (b) sawteeth and (c) giant edge localized modes (ELMs). Model simulations indicate how the transport is affected and allow an assessment of how much the neutron yield would be improved if the MHD activity were absent

日本語訳

JETにおける高温イオンHモードのほぼ全てにおいて、蓄積プラズマエネルギーが飽和し中性子放出率が低下し始める直前に、磁気流体力学(MHD)事象が明確に観測される。多数の放電に対するMHD観測の系統的分析結果を報告する。MHD現象と閉じ込め劣化開始との関係について議論し、性能を制限する3つの主要なMHDタイプ、すなわち(a)プラズマ外側領域における低nモード、(b)鋸歯状振動、(c)巨大ELM(周辺局在モード)の各側面について考察する。モデルシミュレーションは輸送への影響を示し、MHD活動が存在しない場合に中性子放出率がどの程度改善されるかの評価を可能にする。

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jet高精度(タイトル一致)

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JETMagnetohydrodynamics
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