用全波方法研究环形对称托卡马克等离子体中离子回旋频率范围内(ICRF)的快波电流驱动(FWCD)问题,考虑有限拉莫尔半径(FLR)效应和平行色散,建立全波计算的物理模型—全波方程,通过对全波方程的数值求解得到快波在等离子体中激发的电场强度分布.结果表明:快波可以传播到高温高密度等离子体的中心;快波在磁轴附近发生了模式转换;快波可以驱动中心的等离子体电流以改善等离子体的平衡位型;平行电场比垂直电场小三个数量级,通过垂直方向的回旋共振和平行方向的穿越期磁泵效应达到驱动电流的目的.
A full wave numerical method is developed for fast wave current drive in tokamak plasmas, in which finite Larmor radius effects and parallel dispersion are taken into account. A physical model with full wave are developed. Electric field distribution in radial is obtained. It shows that fast wave can propagate to central plasma; Mode conversion happened near central plasmas; Fast wave can drive current in centre to improve balance current profile; Parallel electric is weaker than that in vertical direction. The current is droven by Landau damping and transit-time magnetic pumping.