Excitation of the axisymmetric Alfven eigenmodes by micro-turbulence

被引：2
|
作者：
Marchenko, V. S. [1 ]
Reznik, S. N. [1 ]
机构：
[1] Inst Nucl Res, Prospekt Nauki 47, UA-03680 Kiev, Ukraine
来源：
PHYSICS OF PLASMAS | 2020年 / 27卷 / 11期
关键词：
FREQUENCY MODES;
D O I：
10.1063/5.0022748
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：
Electrostatic, short-wavelength ( k theta rho s > 1, with rho (s) being the ion sound Larmor radius) micro-turbulence, which is present at the plasma edge due to its intrinsic immunity to equilibrium ExB shear suppression, can drive global, axisymmetric [ n = 0 , m = +/- 1, with n(m) being the toroidal (poloidal) mode number] Alfven eigenmode (GAE) with the inertial layer located at the plasma edge, i.e., in the turbulent zone. The excitation mechanism is the modulation instability induced by turbulent Reynolds stress. The growth rate of this instability can overcome GAE continuum damping.
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页数：4
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