线电极和线电极阵列结构的大气压空气纳秒脉冲放电特性

Nanosecond Pulse Discharge Characteristics in Atmospheric Air with Wire Electrode and Wire Electrode Array Configuration

近年来,由于可以在大气压空气中形成较稳定的低温弥散等离子体,重频纳秒脉冲放电受到了广泛的关注。基于一台紧凑型高压重频纳秒脉冲发生器并采用线电极结构,研究了线电极距离、线电极长度、重复频率和多对线电极之间的距离对放电特性的影响。实验结果表明这些参数的变化都会引起弥散放电强度的变化或者放电电弧的产生。长线电极结构有利于抑制电弧的形成,而短线电极结构有利于增强线电极间隙中等离子体的能量。采用多根短线电极平行交叉排布的阵列结构在兼具两者的优点同时,放电强度也没有明显的降低。相关研究结果对于使用阵列电极结构获得大面积放电等离子体的研究具有一定的参考价值。

In recent years, repetitive nanosecond pulsed discharge attracted much attention because it can induce stablecold diffuse plasma in the open air. On the basis of a compact repetitive nanosecond pulses generator and wire electrodeconfiguration, we studied the influences of the distance between electrodes, electrode length, repetitive frequency, and thedistances among multiple electrode pairs on nanosecond pulse discharge characteristics. The experimental results showthat all the parameters mentioned above influence the discharge intensity and/or the appearance of discharge arc. Usinglong wire electrode can prevent the formation of discharge arc, but short wire electrode is favorable for enhancing plasmaenergy in the discharge gap. Meanwhile, both of these advantages can be included by using a cross-parallel short wiredelectrode array configuration, and discharge intensity does not decrease obviously. The results can be used to study theaspect on using array electrode configuration to obtain large-area discharge plasmas.