Frequency chirping of core-localized toroidicity-induced Alfven eigenmodes and their coupling to global Alfven eigenmodes

被引：26

作者：

Kramer, GJ ^{[1
]}

Cheng, CZ

Fu, GY

Kusama, Y

Nazikian, R

Ozeki, T

Tobita, K

机构：

[1] Japan Atom Energy Res Inst, Naka Fus Res Estab, Naka, Ibaraki 31101, Japan

[2] Princeton Univ, Princeton Plasma Phys Lab, Princeton, NJ 08543 USA

来源：

PHYSICAL REVIEW LETTERS | 1999年 / 83卷 / 15期

关键词：

D O I：

10.1103/PhysRevLett.83.2961

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

The fast frequency change or chirping of core-localized toroidicity-induced Alfven eigenmodes (C-TAE), excited before giant sawteeth during ion cyclotron resonance heating, has been investigated. The chirping can be accounted for by small changes of the central q profile. When the C-TAE crosses the frequency of a global TAE (G-TAE) a small frequency gap was found. These gaps can be attributed to mode coupling between the C-TAE and a G-TAE which is observed for the first time. The coupling and the frequency gaps are consistent with linear TAE mode coupling.

引用

页码：2961 / 2964

页数：4

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