RESONANT DAMPING OF TOROIDICITY-INDUCED SHEAR-ALFVEN EIGENMODES IN TOKAMAKS

被引：191

作者：

ZONCA, F

CHEN, L

机构：

[1] EURATOM,ENTE NAZL ENERGIA ATOM FUS,ROME,ITALY

[2] PRINCETON UNIV,DEPT ASTROPHYS SCI,PRINCETON,NJ 08543

来源：

PHYSICAL REVIEW LETTERS | 1992年 / 68卷 / 05期

关键词：

D O I：

10.1103/PhysRevLett.68.592

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

An analytical theory of toroidicity-induced shear-Alfven eigenmodes (TAE) is presented. The full two-dimensional problem is treated using a variational approach and the radial eigenmode structure is analyzed. We show that TAE suffer a significant damping due to the strong absorption occurring at the resonances with the shear-Alfven continuous spectrum. The resonant damping is shown to be larger than the electron Landau damping and therefore constitutes an important dissipation mechanism in determining the threshold for TAE instabilities driven by alpha and energetic particles in tokamak experiments.

引用

页码：592 / 595

页数：4

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