中文摘要：

为了研究小点连线超四边形发光斑图的时空结构，进行了纯空气的介质阻挡放电实验，首次观察到了小点连线超四边形发光斑图。采用光电倍增管，对斑图不同位置放电丝的光信号进行采集，经分析可知：小点连线超四边形发光斑图是由3套不同的子结构相互嵌套组成。在每半个电压周期内放电顺序为：大点一小点一小点连线，并且小点及小点连线放电是随机的，放电均发生在电压的上升沿。通过高速照相机拍摄的瞬时照片可知：大点的放电时刻主要集中在第一个电流脉冲的前部；小点及小点连线在其之后，且连续半个电压周期内放电位置不重合，进一步证明了它们的放电随机，这与光信号的结果相符。对大点放电以后的电流脉冲进行积分，结果表明连续正、负半周期的电荷量大小相等、极性相反，对下一周期放电无影响。经分析可知介质板表面积累的壁电荷分布对小点连线超四边形发光斑图的形成及其时空动力学行为具有重要影响。

英文摘要：

In order to analyze the spatiotemporal structure of the small-dot-line square superlattice pattern, the experiment of dielectric barrier discharge in air was carried out. The luminescence of small-dot-line square superlattice pattern was observed for the first time. Optical signals from the discharge filaments at different positions were measured by using photomultiplier. It is found that the luminescence of small-dot-line square superlattice pattern is an interleaving of three different transient sub-lattices. The discharge sequence is followed as the big-dot, small-dot, the line between two small-dots in each half voltage-cycle, and the small-dot and line are random. All of them occur at the rising edge of volt- age. The instantaneous images show that the discharge time of big-dot mainly occurs in the front of the first current pulse, while the discharge time of small-dot and line is later than that of big-dot. The discharge position of small-dot and line between two small-dots are different in two successive half voltage cycles. The above results are consistent with the re- suits of the optical signal. The electric quantities of the small-dot and line in two successive half voltage cycles are calculated. It is found that the polarities of wall charges are opposite and transferred charge quantities are equal, which has no effect on discharge of the next cycle. It is found that wall charges deposited on the dielectric surface have a great in- fluence on discharge process.