Evolution of the surface streamer and the discharge mode transition from the corona discharge to the surface flashover were investigated by pulse sequence resolved electrical and optical measurements under long-term repetitive nanosecond pulses (RNP). The test sample was a cylindrical epoxy resin insulator attached with a needle electrode in 0.1–0.4 MPa nitrogen. Under positive RNP, the inception phase of subsequent streamer discharges decreases with increasing the pulse repetition frequency (PRF), and a periodical streamer stagnation phenomenon appears at high gas pressure. Under negative RNP, the surface streamer does not illustrate symbolic decreasing tendencies in light intensity and corona inception phase in gas gap. The dependence of the evolution of surface streamer velocity on PRF is correlated with the repulsive force from surface charges and the accessibility of seed electrons. Statistical characteristics of back discharges under negative RNP are qualitatively explaine...

中文翻译：

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在长期重复纳秒脉冲下，体积和表面记忆对高压氮气中气/固界面沿流光动力学演化的影响

在长期重复的纳秒脉冲（RNP）下，通过脉冲序列分辨的电学和光学测量，研究了表面流光的演变以及从电晕放电到表面闪络的放电模式转变。测试样品是圆柱形的环氧树脂绝缘体，在0.1-0.4 MPa的氮气中装有针状电极。在正RNP下，随后的拖缆放电的起始阶段随着脉冲重复频率（PRF）的增加而减小，并且在高气压下会出现周期性的拖缆停滞现象。在负RNP下，表面流光未显示气隙中光强度和电晕起始阶段的象征性下降趋势。表面流速度对PRF的依赖性与表面电荷的排斥力和种子电子的可及性相关。定性地解释了负RNP下回放电的统计特征...