Ion‐cyclotron resonance heating by means of the fast wave in a longitudinally inhomogeneous magnetic field
Ion‐cyclotron resonance heating by means of the fast wave in a longitudinally inhomogeneous magnetic field
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纵向不均匀磁场中快波的离子回旋共振加热
DOI：
10.1063/1.864922
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发表时间：
1985
期刊：
影响因子：
--
通讯作者：
R. A. Cairns
中科院分区：
文献类型：
--
作者：
C. Lashmore;V. Fuchs;R. A. Cairns
利用白色、Yoshikawa和Oberman [Phys. Fluids 25，384（1982）]研究的模型，重新考虑了平衡磁场纵向不均匀的等离子体中快波和慢离子回旋波之间的耦合。这样的耦合只能发生在第二离子物种存在时，并为有限的k ε。这种配置与反射镜和托卡马克有关。从通常的冷等离子体模型出发，用耦合点处的值代替所有缓变量，得到近似色散关系。得到的方程保留了原始方程的截止特性。然后，近似色散关系被用来分析模式转换的快波到慢波在少数共振。对于N cAk/ω 1，透射系数接近于1，但对于N 1，透射变得非常弱，对于来自较强场区域的入射，吸收变得很强。当波从我们的入射...
The coupling between the fast wave and the slow ion‐cyclotron wave in a plasma in which the equilibrium magnetic field is longitudinally inhomogeneous is reconsidered, using a model studied by White, Yoshikawa, and Oberman [Phys. Fluids 25, 384 (1982)]. Such a coupling can only occur when a second ion species is present and for finite k⊥. This configuration is of relevance to mirrors and also tokamaks. An approximate dispersion relation is obtained from the usual cold plasma model by replacing all slowly varying quantities by their value at the coupling point. The resulting equation preserves the cutoff properties of the original equation. The approximate dispersion relation is then used to analyze the mode conversion of the fast wave to the slow wave at the minority resonance. For N⊥≡cAk⊥/ω ≪1 the transmission coefficient is close to unity but for N⊥ ≲1 the transmission becomes very weak and for incidence from the stronger field region, the absorption becomes strong. When the wave is incident from the we...