Global gyrokinetic particle simulation of toroidal Alfvén eigenmodes excited by antenna and fast ions
Global gyrokinetic particle simulation of toroidal Alfvén eigenmodes excited by antenna and fast ions
复制标题
DOI：
10.1063/1.3685703
复制
发表时间：
2012-02
影响因子：
2.2
通讯作者：
Wenlu Zhang;I. Holod;Zhihong Lin;Yong Xiao
中科院分区：
文献类型：
--
作者：
Wenlu Zhang;I. Holod;Zhihong Lin;Yong Xiao
在快离子和天线激发下，研究了环形Alfven本征模（TAE）的线性特性。合成天线提供了一个精确的测量阿尔芬连续带间隙宽度和TAE本征模频率，阻尼率和模式结构。测得的间隙宽度表现出的纵横比的线性关系，在协议的本地分析理论。由于快离子的非微扰贡献，相对于理想磁流体力学理论，快离子激发的TAE频率和模式结构显示出显著的径向对称性破缺。通过对圆柱形和环形几何中Alfven本征模的全球陀螺动力学模拟，验证了全球陀螺动力学环形代码（GTC）的电磁能力。
Linear properties of toroidal Alfven eigenmode (TAE) is studied in global gyrokinetic particle simulations using both fast ion and antenna excitations. A synthetic antenna provides a precise measurement of the Alfven continuum gap width and the TAE eigenmode frequency, damping rate, and mode structures. The measured gap width exhibits a linear dependence on the aspect ratio, in agreement to a local analytic theory. The TAE frequency and mode structure excited by fast ions show a significant radial symmetry breaking relative to the ideal magnetohydrodynamic theory due to the non-perturbative contributions from the fast ions. The electromagnetic capability of the global gyrokinetic toroidal code (GTC) is verified through these global gyrokinetic simulations of Alfven eigenmode in cylindrical and toroidal geometries.