利用一组马赫探针研究HL-1M装置刮离层和边缘等离子体流在欧姆放电、壁硼化、偏压抽气孔栏、偏压电极、低混杂波电流驱动、电子回旋共振加热、弹丸注入、分子束注入、激光吹气和补充送气等情况下的平行流马赫数、离子饱和电流扰动、平行流速度剪切和极向流速度的分布。实验中发现局部等离子体电位快速变化，改变了电场分布，改变了边缘等离子体的流速和方向。从而改善了等离子体约束性能。 A set of Mach probes was used to study the effects of ion mobility, wall boriding, biased exhaust hole columns, bias electrodes, low hybrid current drive, electron cyclotron resonance heating, projectile Injection, molecular beam injection, laser blowing and make-up gas, etc. The parallel flow Mach number, the ion saturation current perturbation, the parallel flow velocity shear and the polar current velocity distribution. The experiment found that the local plasma potential changes rapidly, changing the electric field distribution and changing the flow rate and direction of the edge plasma. Thus improving the plasma confinement performance.