Modeling and Simulation of Field Emission from Cathode Surface of Vacuum Diodes

被引：0
|
作者：
Zuo, Yinghong [1 ,2 ]
Wang, Jianguo [1 ,3 ]
Fan, Ruyu [1 ,2 ]
机构：
[1] Northwest Institute of Nuclear Technology, Xi'an 710024, China
[2] Department of Engineering Physics, Tsinghua University, Beijing 100084, China
[3] School of Electronic and Information Engineering, Xi'an Jiaotong University, Xi'an 710049, China
来源：
Zhenkong Kexue yu Jishu Xuebao/Journal of Vacuum Science and Technology | 2014年 / 34卷 / 06期
关键词：
Field emission from the cathode surfaces of vacuum diodes was modeled on the basis of Gaussian's law; and simulated in finite difference method. The influence of the gap distance in a vacuum diode on the field distribution; particularly on the cathode surfaces; was calculated with a self-developed code. The time evolution of the electric field on cathode surfaces and the impact of external field on the steady electric field of cathode surfaces were evaluated. The simulated results show that the accuracy of the simulation significantly depends on the number of real electrons in a super-electron; gap distance of vacuum diode; and external field; and that the number of grid little affects the surface potential of cathode calculated in Gaussian's law. In addition; the steady electric field on cat hode surfaces was theoretically calculated and simulated in particle-in-cell method; and both results show that the newly-developed finite difference simulation provides a better solution;
D O I：
10.3969/j.issn.1672-7126.2014.06.09
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页码：599 / 604
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