Three-wave interactions between fast-ion modes in the national spherical torus experiment

被引：44
|
作者：
Crocker, N. A. [1 ]
Peebles, W. A.
Kubota, S.
Fredrickson, E. D.
Kaye, S. M.
LeBlanc, B. P.
Menard, J. E.
机构：
[1] Univ Calif Los Angeles, Los Angeles, CA 90095 USA
[2] Princeton Plasma Phys Lab, Princeton, NJ 08543 USA
来源：
PHYSICAL REVIEW LETTERS | 2006年 / 97卷 / 04期
关键词：
D O I：
10.1103/PhysRevLett.97.045002
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
Simultaneous bursts of energetic particle mode (EPM) and toroidicity-induced Alfven eigenmode (TAE) activity that correlate with significant fast-ion loss are observed in beam heated plasmas. Three-wave interactions between these modes are conclusively identified, indicating fixed phase relationships. This nonlinear coupling concentrates the energy of the TAEs into a toroidally localized perturbation frozen in the frame of a rigid, toroidally rotating structure formed by the EPMs. This redistribution of energy is significant because it will modify the effect of the TAEs on fast-ion loss.
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页数：4
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