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Density edge localized modes in rotating plasmas

Y.-T. Lau1996年被引用 2Nuclear FusionIF 3出版社

A linear analysis is presented for the density edge localized mode with realistic tokamak edge plasma and electric field profiles. The mode is driven unstable by the electron temperature gradient and is localized by the density pedestal, with a radial mode width proportional to the square root of the density scale length (in H mode). The mode persists under the observed levels of sheared plasma rotation because of its narrow radial width. Its mode frequency, growth time, poloidal mode number and direction of rotation are all found to be comparable with those of the precursors for small (type III) edge localized modes (ELMs) observed in DIII-D and ASDEX. It is concluded that the density edge localized mode is a promising candidate for the precursors

日本語訳

密度エッジ局在モードに関する線形解析を、現実的なトカマク端部プラズマおよび電場分布に対して提示する。このモードは電子温度勾配によって不安定化され、密度ペデスタルによって局在化され、その動径モード幅は密度スケール長の平方根に比例する(Hモードにおいて)。このモードは、その狭い動径幅のために、観測されたレベルのシア付きプラズマ回転下でも持続する。そのモード周波数、成長時間、ポロイダルモード数、および回転方向はすべて、DIII-DおよびASDEXで観測された小規模(タイプIII)エッジ局在モード(ELM)の前駆体のものと同等であることが判明した。密度エッジ局在モードは前駆体の有力な候補であると結論付けられる。

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asdex-upgrade中精度(概要文一致)diii-d中精度(概要文一致)

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Edge localized modeRotating plasma
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