EAST中n=4共振磁扰动下等离子体的环向旋转制动

Toroidal rotation braking induced by n=4 RMP in EAST

在EAST中n=4的共振磁扰动下观察到明显的等离子体旋转制动效应,其分布具有全局性,且峰值靠近等离子体中心。利用模拟得到的新经典环向粘滞(NTV)力矩来反演等离子体环向角速度的变化,结果表明在大部分径向区域与实验测量的速度变化符合得较好,量值上相差约1~2倍。

An obvious toroidal plasma rotation braking effect was observed during the application of n=4 resonant magnetic perturbation(RMP)in EAST,which shows a global profile and a peak located near the plasma center.Neoclassical toroidal viscosity(NTV)theory is one of an effective explanation in magnetic braking.The variation of toroidal angular velocity reproduced with neoclassical toroidal viscosity(NTV)torque shows good qualitative agreement with the measured rotation variation profile in most radial regions,and the difference is 1~2 times.