Modeling of the stabilization of neoclassical tearing modes by localized radio frequency current drive
Modeling of the stabilization of neoclassical tearing modes by localized radio frequency current drive
复制标题
DOI：
10.1063/1.873799
复制
发表时间：
2000
影响因子：
2.2
通讯作者：
Q. Yu;S. Günter;G. Giruzzi;K. Lackner;M. Zabiégo
中科院分区：
文献类型：
--
作者：
Q. Yu;S. Günter;G. Giruzzi;K. Lackner;M. Zabiégo
数值模拟了局域射频（rf）电流驱动下新经典撕裂模的稳定性。自举电流由压强演化方程自洽计算，射频电流源由射线追迹法和Fokker-Planck法计算，磁岛宽度的变化引起的驱动电流分布的变化也通过模拟射频波诱导的快电子的二维输运得到了考虑.研究发现，快电子的平行和垂直输运对稳定化都有重要作用，调制和非调制射频电流驱动的稳定化效果大致相同。新古典撕裂模式被证明是稳定的，由一个连续的射频电流驱动。模拟结果与实验结果基本一致。
Numerical modeling of the stabilization of neoclassical tearing modes by localized radio frequency (rf) current drive is presented. The bootstrap current is self-consistently calculated from the pressure evolution equation, the rf current source is obtained from the ray-tracing code and the Fokker–Planck code, and the change of the driven current profile due to the change of the magnetic island width has also been taken into account by modeling the two-dimensional transport of the fast electrons induced by the rf wave. It is found that both parallel and the perpendicular transport of the fast electrons play important roles in the stabilization, and modulated and nonmodulated rf current drive have approximately the same stabilizing effect. The neoclassical tearing modes is shown to be stabilized by a continuous rf current drive. The simulation results essentially agree with experimental observations.