论文标题
针对销纳米秒的初始短暂阶段在空气中重复脉冲放电
Initial transient stage of pin-to-pin nanosecond repetitively pulsed discharges in air
论文作者
论文摘要
在这项工作中，在最初的20次放电脉冲的短暂阶段研究了纳秒重复脉冲（NRP）放电的纳秒重复脉冲（NRP）放电的参数的演变。使用相干微波散射（CMS），光学发射光谱（OES）和激光雷利散射（LRS）以1、10和100 kHz的重复频率测量了排放间隙中的气体和血浆参数。对于10和100 kHz的重复频率，检测到记忆效应（先前放电脉冲诱导的扰动不会完全衰减）。对于10 kHz的NRP排放，排放参数在第一个脉冲后发生了显着变化，并且由于气体密度和温度的迅速演化而在100 US脉冲时间内的迅速演化而在随后的脉冲之间显着波动，这是由于该时间尺度上间隙中流量场的强烈重新分布而引起的。对于100 kHz的NRP放电，放电脉冲参数在开始后以大约五个脉冲达到了新的稳态。与第一个放电脉冲相比，这种新的稳态与排放脉冲之间的可复制参数以及击穿电压，放电脉冲能量和电子数密度的大幅降低有关。
In this work, evolution of parameters of nanosecond repetitively pulsed (NRP) discharges in pin-to-pin configuration in air was studied during transient stage of initial twenty discharge pulses. Gas and plasma parameters in the discharge gap were measured using coherent microwave scattering (CMS), optical emission spectroscopy (OES) and laser Rayleigh scattering (LRS) for NRP discharges at repetition frequencies of 1, 10 and 100 kHz. Memory effects (when perturbations induced by the previous discharge pulse would not decay fully till the subsequent pulse) were detected for the repetition frequencies of 10 and 100 kHz. For 10 kHz NRP discharge, the discharge parameters experienced significant change after the first pulse and continued to substantially fluctuate between the subsequent pulses due to rapid evolution of gas density and temperature during the 100 us inter-pulse time caused by intense redistribution of the flow field in the gap on that time scale. For 100 kHz NRP discharge, the discharge pulse parameters reached a new steady state at about five pulses after initiation. This new steady state was associated with well-reproducible parameters between the discharge pulses and substantial reduction of breakdown voltage, discharge pulse energy, and electron number density in comparison with the first discharge pulse.
