采用高速照相机研究介质阻挡放电超四边斑图的时空结构  

Spatiotemporal Structure of the Square Superlattice Pattern in Dielectric Barrier Discharge Observed by High-speed Camera

作　　者：董丽芳[1,2] 张新普[1,2] 张超[1,2] 申中凯[1,2] 

机构地区：[1]河北大学物理科学与技术学院,保定071002 [2]河北省光电信息材料重点实验室,保定071002

出　　处：《高电压技术》2014年第4期1229-1234,共6页High Voltage Engineering

基　　金：国家自然科学基金(11175054);博士点基金(20101301110001);河北省科技厅重点项目(11967135D);河北省教育厅重点项目(ZD2010140)~~

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;在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套四边形子结构组成,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。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.

关 键 词：介质阻挡放电(DBD) 高速照相机 超四边斑图 时空结构 子结构 壁电荷 

分 类 号：O461[理学—电子物理学]