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Influence of the plasma edge on tokamak performance

H.R. Wilson, J.W. Connor, A.R. Field, S.J. Fielding, R.J. Hastie, R.L. Miller, J.B. Taylor2000年被引用 21Nuclear FusionIF 3出版社

A number of edge plasma physics phenomena are considered to determine tokamak performance: transport barrier, edge MHD instabilities and plasma flow. These phenomena are thought to be causally related: a spontaneous increase in the plasma flow (actually, its radial variation) suppresses heat and particle fluxes at the plasma edge to form a transport barrier; the edge pressure gradient steepens until limited by MHD instabilities, resulting in a temperature pedestal at the top of the steep gradient region; a number of core transport models predict enhanced confinement for higher values of the temperature pedestal. The article examines these phenomena and their interaction.

日本語訳

トカマク性能を決定すると考えられるいくつかの周辺プラズマ物理現象がある:輸送障壁、周辺MHD不安定性、およびプラズマ流である。これらの現象は因果関係があると考えられている:プラズマ流の自発的な増加(実際にはその径方向変化)は、周辺部での熱・粒子フラックスを抑制して輸送障壁を形成する;周辺圧力勾配はMHD不安定性によって制限されるまで急峻化し、その結果、急峻勾配領域の頂部に温度ペデスタルが生じる;いくつかのコア輸送モデルは、温度ペデスタルが高いほど閉じ込めが向上すると予測する。本論文はこれらの現象とその相互作用を考察するものである。

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