利用径向可移动朗缪尔三探针和马赫探针对HT 7超导托卡马克边界等离子体参量及其涨落进行了空时空分辨测量 .给出了欧姆放电及其与低杂波电流驱动共同作用下边界等离子体电位p、电子温度Te 和电子密度ne 及其涨落的径向分布 .实验表明 ,在限制器附近 ,存在一由Er×B确定的极向旋转速度剪切层 .在剪切层内 ,Te 和ne分布较陡 ,且p,Te 和ne 的相对涨落水平下降明显 .这说明剪切层对边界区的等离子体涨落具有抑制作用 .低杂波驱动使径向电场梯度变陡 ,从而使剪切程度加深但对剪切层宽度无影响 .此外 ,测量表明等离子体环向速度马赫数M 存在径向梯度 .环向流的这种径向梯度可能是形成径向电场所需的平均极向流的一种重要驱动源 Space-time and space-resolved measurements of the plasma parameters and their fluctuations at HT 7 superconducting tokamak boundary were performed using a radially movable Langmuir triple probe and a Mach probe. The results show that the ohmic discharge and its relationship with low clutter current The plasma potential p, the electron temperature Te and the electron density ne and their fluctuations in the radial direction under the combined action of the driving force and the driving force.Experiments show that in the vicinity of the limiter there is a polar rotation speed shear layer In the shear layer, the distribution of Te and ne is steep, and the relative fluctuations of p, Te and ne decrease obviously, which indicates that the shear layer has an inhibitory effect on the plasma fluctuation in the boundary region. So that the radial electric field gradient steep, so that the shear depth but no effect on the width of the shear layer.In addition, measurements show that there is a radial gradient in the plasma toroidal Mach Mach number M. This radial gradient of the toroidal flow It may be an important driving source for the average poloidal flow required to create a radial electric field