利用ns级时间分辨可见光分幅相机和光纤传感器对“强光一号”环-板型水介质开关进行光学测量,得到了电流通道发展图像以及整个放电过程的光强变化信号。实验结果表明:环-板型水介质开关开始击穿时的平均场强约为190 kV/cm,同时存在多个放电通道,流注呈树枝状分布,发展速度为几十cm/μs。 Using ns time-resolved visible light amplitude camera and optical fiber sensor to optically measure “glare ” ring-plate type aqueous medium switch, the current channel development image and the light intensity change signal of the entire discharge process are obtained. The experimental results show that the average field strength of the ring-plate type water-dielectric switch is about 190 kV / cm at the beginning of breakdown, and there are several discharge channels at the same time. The flow distribution is dendritic and its development speed is several tens cm / μs.