Plasma Evolution of Surface Flashover Form Process in Vacuum by 2D PIC-DSMC Code

被引：0
作者：
Xu A. [1 ]
Jin D. [1 ]
Cheng Y. [1 ]
Chen L. [1 ]
Tan X. [1 ]
机构：
[1] Institute of Electronic Engineering, China Academy of Engineering Physics, Mianyang
来源：
Xu, Ao (xuao@caep.cn) | 2018年 / Science Press卷 / 44期
关键词：
Field emission; Insulator; Plasma; Simulation; Surface flashover;
D O I：
10.13336/j.1003-6520.hve.20180828030
中图分类号：
学科分类号：
摘要：
The surface flashover is a major limitation to high-voltage components in vacuum, therefore it is important to master the main factors which affect the plasma formation and evolution in surface flashover for further enhancing the insulating performances of relative components. We established a simulation model of the surface flashover in 1 mm vacuum gap by a 2D PIC-DSMC code, in which some basic physical processes, such as field emission in the vicinity of the metal-vacuum-dielectric junction, charge accumulation effect in insulator surface, secondary electron emission, gas desorption, and electrons interact with gas etc, were considered. Then, the temporal and spacial density distribution of electrons, ions and neutral particles are presented. The enhancement of electric field on cathode surface and the increases of field emission electrons induced by the charge accumulation effect on insulator surface is revealed. Finally, it is indicated that surface flashover is formed as massive ions appearing near the cathode to enhance field emission. The results provide a base for further understanding the surface flashover in vacuum and further enhancing the performances of components. © 2018, High Voltage Engineering Editorial Department of CEPRI. All right reserved.
引用
收藏
页码：3001 / 3008
页数：7
相关论文
共 31 条
  • [1] Xu A., Wang W., Yue L., Et al., Dielectric surface breakdown in vacuum in the microwave tube, Chinese Journal of Electron Devices, 30, 3, pp. 770-774, (2007)
  • [2] Miller H.C., Surface flashover of insulators, IEEE Transactions on Electrical Insulation, 24, 5, pp. 765-786, (1989)
  • [3] Yu K., Zhang G., Mu H., Et al., Effect of different surface treatment on the surface flashover characteristics of machinable ceramic in vacuum, Transactions of China Electrotechnical Society, 27, 5, pp. 115-120, (2012)
  • [4] Lang Y., Wang Y., Su G., Et al., Influence of surface roughness on vacuum flashover characteristics of PMMA, High Voltage Engineering, 41, 2, pp. 474-478, (2015)
  • [5] Xu L., Wang M., Li F., Et al., Spectroscopic study of surface flashover under pulsed voltage in vacuum, IEEE Transactions on Plasma Science, 43, 10, pp. 3546-3549, (2015)
  • [6] Yusuke N., Hiroki K., Kenji T., Et al., Transient charging characteristics in surface flashover development process due to explosive electron emission in vacuum, Electrical Engineering in Japan, 193, 2, pp. 10-17, (2015)
  • [7] Gleizer J.Z., Krasik Y.E., Dai U., Et al., Vacuum surface flashover: experiments and simulations, IEEE Transactions on Dielectrics and Electrical Insulation, 21, 5, pp. 2394-2404, (2014)
  • [8] Perkins M.P., Houck T.L., Javedani J.B., Et al., Progress on simulating the initiation of vacuum insulator flashover, 17th IEEE International Pulsed Power Conference, (2009)
  • [9] Aldan M.T., Verboncoeur J.P., Simulation of high-voltage DC breakdown for angled dielectric insulators including space-charge and gas collision affects, 2012 IEEE International Power Modulator and High Voltage Conference, (2012)
  • [10] Cai L.B., Wang J.G., Zhang D.H., Et al., Self-consistent simulation of the initiation of the flashover discharge on vacuum insulator surface, Physics of Plasmas, 19, 7, (2012)
1234