Spots on electrodes and images of a gap during pulsed discharges in an inhomogeneous electric field at elevated pressures of air, nitrogen and argon
Spots on electrodes and images of a gap during pulsed discharges in an inhomogeneous electric field at elevated pressures of air, nitrogen and argon
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DOI：
10.1088/0963-0252/23/5/054018
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发表时间：
2014-09
影响因子：
3.8
通讯作者：
T. Shao;V. Tarasenko;Wenjin Yang;D. Beloplotov;Cheng Zhang;M. Lomaev;P. Yan;D. Sorokin
中科院分区：
文献类型：
--
作者：
T. Shao;V. Tarasenko;Wenjin Yang;D. Beloplotov;Cheng Zhang;M. Lomaev;P. Yan;D. Sorokin
本文研究了非均匀电场中脉冲放电时电极上爆发电子发射产生的亮斑现象。实验进行了使用三个实验设置，在2 ns，40 ns，和130 ns，分别匹配负载的电压脉冲持续时间。获得了在高压下充有气体（空气、氮气和氩气）的管-板或针-板间隙结构中扩散放电过程中电极斑点形成的数据。发现在空气和其它气体中，在通过差距的电流的方向改变和电压脉冲持续时间的增加期间，在平坦电极上和具有小曲率半径的电极的负极性上出现亮点。结果表明，在具有小曲率半径的电极的正极性处，由于动态位移电流在差距电导中的参与，平板电极上的亮点出现。
Pulsed discharge in a nonuniform electric field accompanied by the appearance of bright spots due to explosive electron emission on electrodes has been investigated. The experiments were carried out using three experimental setups, a voltage pulse duration at a matched load of 2 ns, 40 ns, and 130 ns, respectively. Data on the formation of electrode spots during diffuse discharges in tube-plate or needle-plate gap configurations filled with gases at elevated pressures (air, nitrogen and argon) were obtained. It was found that in the air and other gases, bright spots arise on the flat electrode, and on the negative polarity of the electrode with a small radius of curvature, during the direction change of the current through the gap and the increase of the voltage pulse duration. It was shown that at the positive polarity of the electrode with a small radius of curvature, bright spots on the flat electrode arise due to the participation of the dynamic displacement current in the gap conductance.