OBSERVATION OF BETA-INDUCED ALFVEN EIGENMODES IN THE DIII-D TOKAMAK

被引：242
|
作者：
HEIDBRINK, WW [1 ]
STRAIT, EJ [1 ]
CHU, MS [1 ]
TURNBULL, AD [1 ]
机构：
[1] GEN ATOM,SAN DIEGO,CA 92186
来源：
PHYSICAL REVIEW LETTERS | 1993年 / 71卷 / 06期
关键词：
D O I：
10.1103/PhysRevLett.71.855
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
Energetic ions can drive Alfven gap modes unstable, causing large losses of fast ions. Toroidicity-induced Alfven eigenmodes (TAE) were expected to disappear into the shear Alfven continuum and become stable as the plasma beta increased. Although TAE modes may disappear, another dangerous instability with similar properties but approximately half the TAE frequency appears in a spectral gap that is created by finite beta effects. The measured frequency of the new mode agrees with the theoretical frequency of beta-induced Alfven eigenmodes.
引用
收藏
页码：855 / 858
页数：4
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