摘要
导出了微岛(w/ρi→0)的垂直粘滞性,运用该粘滞性获得了微岛的静电势函数和岛宽随时间演化的动力学方程。理论分析表明,该粘滞性引起的极化电流对微岛起不稳定作用。进一步的数值分析显示当离子温度较小或离子温度突然下降时,极化电流使微岛快速增长,与实验观测到的结果定性一致。
The perpendicular viscosity for the micro-island （w/ρ→0 ） has been derived. Based on the viscosity, the electrostatic potential function and the dynamic equation of magnetic island evolution have been obtained. The dynamic equation indicates that the viscosity-induced polarization current plays an unstable role in micro-island evolution. Furthermore, numerical analyses show that when ion temperature is small or decreases suddenly, the polarization current makes micro-islands grow rapidly, which are roughly in agreement with the exoerimental observation.
出处
《核聚变与等离子体物理》
CAS
CSCD
北大核心
2010年第1期17-20,共4页
Nuclear Fusion and Plasma Physics
基金
国家自然科学基金资助课题(10775040
10875037)
关键词
粘滞性
微岛
静电势函数
极化电流
离子温度
Viscosity
Micro-island
Electrostatic potential function
Polarization current
Ion temperature
