Kinetic Alfvén eigenmodes in a hot tokamak plasma
Kinetic Alfvén eigenmodes in a hot tokamak plasma
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DOI：
10.1088/0741-3335/39/4/002
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发表时间：
1997-04
影响因子：
2.2
通讯作者：
A. Jaun;K. Appert;A. Fasoli;T. Hellsten;J. Lister;J. Václavík;L. Villard
中科院分区：
文献类型：
--
作者：
A. Jaun;K. Appert;A. Fasoli;T. Hellsten;J. Lister;J. Václavík;L. Villard
动力学效应，如有限的离子拉莫尔偏移和共振朗道相互作用的研究在环形Alfven本征模（TAE）的频率范围。一个新的阿尔芬模式转换机制，通过环形模式耦合发生远离谐振。它产生一组动力学Alfven本征模（KAE）在每个流体本征模附近，与波场，延伸到整个等离子体半径，并可能导致大量的粒子损失。从JET托卡马克的测量结果进行比较表明，在响应上观察到的多个峰值是在附近的伸长引起的阿尔芬本征模的KAE引起的。
Kinetic effects such as finite ion Larmor excursions and resonant Landau interactions are studied in the toroidicity Alfven eigenmode (TAE) range of frequencies. A new Alfven mode conversion mechanism is described taking place away from the resonances through toroidal mode coupling. It generates a group of kinetic Alfven eigenmodes (KAE) in the neighbourhood of each fluid eigenmode, with wavefields that extend throughout the plasma radius and could lead to substantial a particle losses. Comparisons carried out with measurements from the JET tokamak show that the multiple peaks observed on the response are KAE-induced in the neighbourhood of an elongation-induced Alfven eigenmode.