%0 Journal Article
%T A DESIGN OF THE TRANSITION REGION ABOUT PARTIALLY SHIELDED CATHODE WITH UNIFORM AND PERIODIC MAGNETIC FOCUSING FIELD<br>均匀磁聚焦和周期磁聚焦部分屏蔽流过渡区的设计
%A Lu Peiju
%A <br>鲁佩菊
%J 电子与信息学报
%D 1998
%I 
%X This paper describes a method about the design of the transition region of the electron beam from partially shielded cathode with uniform and periodic magnetic focusing field. It is necessary to use paraxial ray equation in non-equipotential space for the electron optics system in which anode potential is not the same as helix potential or for the electron optics system in which anode potential is the same as helix potential, but the perveance is high, thus the anode hole influence is strong. Some idea about the problem of coincidence of electron trajectory in electron gun with magnetic flux line for the electron optics system using partially shielded cathode with periodic magnetic focusing field is presented.
%K Uniform magnetic focusing
%K Periodic magnetic focusing
%K Electron beam from partially shielded cathode
%K Transition region<br>均匀磁聚焦
%K 周期磁聚焦
%K 屏蔽流
%K 过渡区
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=5B3AB970F71A803DEACDC0559115BFCF0A068CD97DD29835&cid=1319827C0C74AAE8D654BEA21B7F54D3&jid=EFC0377B03BD8D0EF4BBB548AC5F739A&aid=BB39D7E398ED5755B97550716EB4FDD3&yid=8CAA3A429E3EA654&vid=A04140E723CB732E&iid=0B39A22176CE99FB&sid=866F8A6B640835A7&eid=4E6F5C60B72D9B1C&journal_id=1009-5896&journal_name=电子与信息学报&referenced_num=0&reference_num=6