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The effect of plasma profile variation on the stability of the n = 1 internal kink mode in rotating tokamak plasmas

I.T. Chapman, J.P. Graves, C. Wahlberg, the MAST Team2010年被引用 14Nuclear FusionIF 3出版社

The sensitivity of the stability of the ideal n = 1 internal kink mode to variations in the plasma profiles is analysed both analytically and numerically in rotating tokamak plasmas. These stability analyses have been carried out including the centrifugal effects of toroidal plasma rotation upon the equilibrium, and also inconsistently when the equilibrium is treated as static. The change in plasma stability due to rotation is partially (consistent equilibrium) or wholly (inconsistent treatment) determined by the radial profiles of the plasma density and rotation velocity. It is found that the internal kink mode stability is strongly influenced by small variations in these plasma profiles. The implications of this extreme sensitivity are discussed, with particular reference to experimental data from MAST.

日本語訳

回転トカマクプラズマにおいて、理想的な n = 1 内部キンクモードの安定性の、プラズマ分布の変動に対する感度が、解析的および数値的に解析される。これらの安定性解析は、平衡に対するトロイダルプラズマ回転の遠心力効果を含めて実施され、また、平衡が静的として扱われる非一貫な方法でも実施される。回転によるプラズマ安定性の変化は、部分的には(一貫した平衡)または完全には(非一貫な取り扱い)プラズマ密度と回転速度の動径分布によって決定される。内部キンクモードの安定性が、これらのプラズマ分布のわずかな変動によって強く影響されることが見出される。この極度の感度の含意が、特にMASTからの実験データに関連して議論される。

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mast中精度(概要文一致)

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Kink modeInternal kink mode
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