采用介质阻挡放电装置,在不同的边界条件下,在大气压氩气放电中观察到了稳定的四边形发光斑图.采用光电倍增管,在纳秒时间尺度测量了四边形斑图的时空动力学,发现它是由两套具有时间反演行为的四边形子结构交替振荡并相互嵌套而成的.讨论了介质表面的壁电荷分布对发光斑图的形成及其时空动力学行为的影响.
Stable square emission patterns are observed in argon discharge at atmospheric pressure by using a dielectric barrier discharge device with different lateral boundary conditions. The spatio-temporal dynamics of square pattern in nanosecond time scale is investigated. It is found that the square pattern is an interlacing of two oscillating square sublattices, which have time sequence inversion behavior. The influence of the wall charge distribution on the forming process and the spatio-temporal dynamics of the emission patterns is discussed.