中文摘要：

为了研究介质阻挡放电中超四边形斑图的时空结构，首次采用三通道高速照相机，在外加电压的半个周期内，对此斑图的不同电流脉冲进行瞬态拍照。实验发现：稳定的超四边斑图能在不同的实验条件下得到：往外加电压的每半周期内，超四边斑图的放电电流由3个明显的脉冲组成，其中2个脉冲位于电压绝对值的上升沿，1个位于其下降沿；超四边斑图由3套四边形予结构组成，其中上升沿放电的小点四边形和大点四边形相互嵌套，而在下降沿放电的小点位于大点的中心。经分析发现，壁电荷在超四边斑图时空结构的形成中起到了重要的作用。

英文摘要：

In order to analyze the spatiotemporal structure of square superlattice pattern, for the first time, we took the instantaneous pictures corresponding to different current pulses in one shoot, using an intensified charge coupled device （ICCD） camera with three channels. Stable square superlattice patterns are obtained in different experimental conditions. In each half voltage cycle, the current waveform of the pattern is comprised of three current pulses, two of which are at the rising edge of the absolute value of voltage and the third one is at the falling edge. Consequently, the square superlat- tice pattern consists of three square sublattices. Two of them, which are composed of small dots and big dots respectively, represent discharge at the rising edge of the absolute value of voltage and interleave with each other. The other one, formed by small dots, locates at the centre of big dots, and represents at the falling edge of the voltage. Further analysis indicates that wall charges play an important role in forming the spatiotemporal structure of square superlattice patterns.