Experimental study on conduction current of positive nanosecond-pulse diffuse discharge at atmospheric pressure
Experimental study on conduction current of positive nanosecond-pulse diffuse discharge at atmospheric pressure
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DOI：
10.1109/tdei.2013.6571449
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发表时间：
2013-08
影响因子：
3.1
通讯作者：
Cheng Zhang;T. Shao;Hao Ma;Dongdong Zhang;C. Ren;P. Yan;V. Tarasenko;E. Schamiloglu
中科院分区：
文献类型：
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作者：
Cheng Zhang;T. Shao;Hao Ma;Dongdong Zhang;C. Ren;P. Yan;V. Tarasenko;E. Schamiloglu
纳秒脉冲放电有多种放电方式，如电晕放电、扩散放电、火花或电弧等。对于大气压下的各种应用来说，密集的扩散放电是特别理想的。在本文中，使用磁压缩脉冲发生器产生重复的正纳秒脉冲来激发扩散放电。发生器的输出脉冲的上升时间约为 25 ns，半峰全宽为 40 ns。通过测量其电压和电流波形以及放电图像来研究扩散放电的电气特性。通过测量的电压和电流计算出传导电流，这就是真实的放电电流。实验结果表明，在大气压下能够获得稳定的扩散放电，并且在我们的实验条件下传导电流是单极的并且具有相似的几安培的幅值，与位移电流具有相似的幅值。此外，气隙间距和脉冲重复频率（PRF）影响扩散放电的强度和模式转变。传导电流随着 PRF 的增加而增加，但随着气隙间距的增加而减少。因此，在适当的气隙、高脉冲重复频率和正脉冲的某些条件下，可能会出现扩散放电。
Nanosecond pulsed discharges have various discharge modes, such as corona, diffuse discharge, spark or arc. A dense diffuse discharge is particularly desirable for various applications at atmospheric pressure. In this paper, a magnetic-compression pulse generator was used to produce repetitive positive nanosecond pulses for excitation of a diffuse discharge. The output pulse of the generator had a rise time of about 25 ns and a full width at half maximum of 40 ns. Electrical characteristics of the diffuse discharge were studied by measuring its voltage and current waveforms, as well as images of the discharge. The conduction current was calculated by the measured voltage and current, which was a true discharge current. The experimental results show that a stable diffuse discharge could be obtained at atmospheric pressure, and the conduction current was unipolar and had similar amplitude of several amperes under our experimental condition, which has the similar amplitude with the displacement current. Furthermore, the air gap spacing and pulse repetition frequency (PRF) affected the intensity and mode transition of the diffuse discharge. The conduction current increased with the PRF but decreased with the air gap spacing. Therefore, the diffuse discharge was likely available under some conditions of proper air gap, high PRF with positive pulse.