摘要
通过电极偏压来控制KT 5C装置边缘区等离子体的径向电场 ,发现在正偏压作用下 ,径向电场剖面由小的负阱状变成明显的山包结构 ,从而形成一个加强的E×B剪切层。剪切层附近的等离子体参数变陡 ,不仅等离子体极向流速度大大增加 ,而且其方向也由沿电子逆磁漂移方向改变为离子的逆磁漂移方向。这些变化导致等离子体边界横向输运被抑制。
The radial electric field of the plasma in the KT-5C tokamak is controlled using electrode biasing.It is found that with positive bias,radial electrical field changes from a low negative well to a modest positive hill,and an enhanced E×B shear layer appears.Plasma parameters are steepened near the shear layer,and the plasma poloidal flow speed increases greatly and changes its direction from electron diamagnetic to that of ion diamagnetic drift,these changes lead to amelioration of the poloidal transport in the plasma edge and improvement of the plasma confinement.
出处
《核聚变与等离子体物理》
CAS
CSCD
北大核心
2002年第1期49-53,共5页
Nuclear Fusion and Plasma Physics
基金
国家自然科学基金资助项目 (196 35 0 2 0
196 75 0 36
19775 0 46 )
教育部博士点基金资助项目 (95 35 80 6
980 3810 )
中国科学院资助项目
