中文摘要：

为了探讨大气压氖气介质阻挡放电的多脉冲现象的本质,实验测量了多脉冲放电的电压电流波形,建立了多脉冲放电的电路模型,并利用ICCD高速相机研究了多脉冲辉光放电模式的演化过程.研究结果表明,多脉冲中的各次脉冲气隙电压的变化和单脉冲中气隙电压的变化趋势相同,即在气隙击穿前,气隙电压逐渐上升,在气隙击穿后突然下降.由于介质阻挡产生的异号电荷和外加电场的共同作用,使得多脉冲中每个电流脉冲对应的气隙击穿电压峰值出现逐渐下降的趋势.ICCD高速时间分辨图像表明,多脉冲的每个脉冲放电的底面演化过程与单脉冲时的辉光放电是十分相似的,都呈现出径向发展的过程,但相邻放电脉冲其放电的径向发展过程呈现互补现象,即若一个从内到外另一个就从外到内.这说明放电总是以活性粒子存活数量较多的地方作为放电的起始位置.同时,实验结果说明不能通过电流脉冲个数的多少判断放电是否均匀,多脉冲放电也可能是均匀放电.

英文摘要：

In order to further understand multi-peak dielectric barrier discharges （MP-DBD） in neon gas at atmosphericpressure, we measured the electric parameters of MP-DBD, established a circuit model of MP-DBD, and discussed theevolution of multi-peak glow discharge using an ICCD high-speed camera. It is concluded that the gap voltage for eachpulse in a multi-peak discharge processes in a similar way to that of single-peak discharge, i.e. before breakdown, thevoltage keeps rising and it drops sharply after gap breakdown. However, due to the charges of different polarity generatedfrom dielectric barrier and the applied electric field, the peak breakdown voltages of the pulses in a multi-peak dischargegradually decreases. According to the time-resolved images captured by ICCD camera, the bottom progression of eachpulse in a multi-peak discharge is similar to that of single-peak glow discharge, i.e. they developed in radial direction.However, the radial development of adjacent pulses in a multi-peak discharge had opposite directions： if one processesfrom inside to outside, the next will be from outside to inside. This indicates that discharges always start from the locationhaving the most active particles survival. Furthermore, it is concluded that the pulse number can not be used as an indexof uniform discharge, since MP-DBD may be uniform.