RESEARCH ARTICLE

PIC simulation study of electron gun with rotational surface cathode

  • Weihao LIU ,
  • Shenggang LIU
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  • Center of Terahertz Science and Technology, School of Physical Electronics, University of Electronic Science and Technology of China, Chengdu 610054, China

Received date: 20 Apr 2010

Accepted date: 17 Sep 2010

Published date: 05 Dec 2011

Copyright

2014 Higher Education Press and Springer-Verlag Berlin Heidelberg

Abstract

The electron gun with rotational surface cathode is presented to improve the laminarity of the converging electron beams in this paper, and the function expression of the rotational surfaces is given. The results of particle in cell (PIC) simulation indicate that anode-hole spherical aberration is the major cause for the nonlaminarity of the electron beams. By properly choosing the size of the shape, rotational surface cathode can effectively counteract the effect of the anode-hole spherical aberration and enhance the laminarity of the electron beams. The theoretical analysis was carried out for the explanation of the phenomenon that appeared in the PIC simulation.

Cite this article

Weihao LIU , Shenggang LIU . PIC simulation study of electron gun with rotational surface cathode[J]. Frontiers of Electrical and Electronic Engineering, 2011 , 6(4) : 556 -562 . DOI: 10.1007/s11460-011-0156-9

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