KT-5C边缘等离子体湍流性质的实验研究

EXPERIMENTAL INVESTIGATION OF EDGE TURBULENCE IN THE KT 5C TOKAMAK

利用四探针方法系统地研究了ＫＴ－５Ｃ托卡马克边缘等离了体的湍流性质。实验结果指出，在限制器内０．５ｃｍ处，有一自然产生的径向电场剪切层。由Ｅｒ×Ｂ引起的等离子体整体的极向旋转在剪切层外沿着离子逆磁漂移方向，而在剪切层内则是沿着电子逆磁漂移方向的。相关分析表明，在剪切层上等离子体的自相关时间最短，约６μｓ，在不同的环向位置上只有位于同一磁力线上的湍流才是高度相关的。

We have investigated the turbulence properties of edge plasma in the KT 5Ctokamak using aquadri probe. The results indicate that there exists a shear layer of the radial electric field naturally about 5mm inside the limiter. The whole poloidal plasma rotation induced by E r×B is in ion/ electron diamagnetic direction outside/ inside the shear layer respectively. With correlation analysis, it is found that the self correlation time of the edge turbulence has its minimum of about 6μs on the shear layer and the turbulence located on the same magnetic field line is highly correlated.