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中文摘要：
为了研究复杂同心圆环斑图的时空结构,采用水电极介质阻挡放电装置,在氩气和空气的混合气体中进行放电实验,并使用高速照相机对其进行拍摄研究。实验发现：该斑图在每半个电压周期内有3个电流脉冲段,其中2个脉冲位于电压的上升沿,1个位于其下降沿。利用高速照相机以每个电流脉冲段为曝光时间,对复杂同心圆环斑图的时空结构进行了研究,发现斑图是由小点、环和中心点构成的3套同心圆环子结构组成。依据以上实验结果的分析,发现壁电荷和放电丝之间的活化禁阻作用影响复杂同心圆环斑图的时空结构以及其中环的形成。
英文摘要：
The spatio-temporal structure of complicated concentric-ring pattern was investigated under a water-electrode dielectric barrier discharge configuration in argon and air mixture. The pattern has three current pulse phases in its current signal, two of them at the rising edge of the applied voltage and another at the failing edge. The spatio-temporal discharge structure was investigated through the images with exposure time correlated with the three current pulse phases by an in- tensified charge coupled device camera. It is found that the pattern is composed of three concentric-ring substructures constituted by small spots, halos, and central spots, respectively. Moreover, based on the above experimental results, the spatio-temporal discharge characteristic of the pattern was discussed by analyzing the effect of surface charge.
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