Resonant interaction of fast particles with neoclassical tearing modes

被引：6
|
作者：
Marchenko, VS [1 ]
Lutsenko, VV [1 ]
机构：
[1] Inst Nucl Res, Ctr Sci, UA-03680 Kiev, Ukraine
来源：
PHYSICS OF PLASMAS | 2001年 / 8卷 / 02期
关键词：
D O I：
10.1063/1.1337616
中图分类号：
O35 [流体力学]; O53 [等离子体物理学];
学科分类号：
070204 ; 080103 ; 080704 ;
摘要：
Cherenkov resonance between rotating neoclassical tearing mode (NTM) and energetic ions has been considered. Resonant interaction drives the current, which is in phase quadrature with the magnetic island and thus produces a toroidal torque accelerating island in the direction of the fast ion diamagnetic drift. This torque has been included in the coupled nonlinear first-order differential equations governing evolution of the NTM rotation frequency and amplitude. It has been shown that due to resonant interaction with energetic ions, this autonomous system exhibits Hopf bifurcation from the unstable stationary solution to the stable limit cycle describing nonlinear oscillations of the mode frequency and amplitude. Such behavior resembles the frequency jump events observed during NTM activity in ASDEX Upgrade [S. Guenter , Phys. Plasmas 7, 935 (2000)]. (C) 2001 American Institute of Physics.
引用
收藏
页码：510 / 515
页数：6
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