%0 Journal Article
%T STUDY ON OPEN COLUMN SLOW-WAVE GRATING STRUCTURE''S DISPERSION CHARACTERISTICS<br>开放式圆柱光栅周期结构的色散特性分析
%A CHEN Bei-Ran
%A WEI Yan-Yu
%A GONG Yu-Bin
%A YUE Ling-N
%A WANG Wen-Xiang
%A <br>陈蓓冉
%A 魏彦玉
%A 宫玉彬
%A 岳玲娜
%A 王文祥
%J 红外与毫米波学报
%D 2007
%I Science Press
%X The open column slow-wave grating structure, which is a novel type slow-wave system for Smith-Purcell FEL and relativistic TWT, was presented. The dispersion equation of the structure was derived by means of an approximate field-theory analysis, in which the continuous profile of the groove was approximately replaced by a series of rectangular steps, and the field continuity at the interface of two neighboring steps and the matching conditions at the interface between the groove region and central region were employed. The dispersion characteristics of the fundamental wave were numerically calculated and the effects of the geometrical dimensions of the grating on dispersion characteristics of system were also analyzed. And the simulation values of the structure, which is performed by using two-dimensional particle-in-cell code MAGIC, match the theoretical values very well.
%K Smith-Purcell FEL
%K relativistic TWT
%K approximate field-theory analysis
%K open column slow-wave grating structure<br>Smith-Purcell自由电子激光
%K 相对论行波管
%K 近似的场论方法
%K 开放式圆柱光栅周期结构
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=5B3AB970F71A803DEACDC0559115BFCF0A068CD97DD29835&cid=1319827C0C74AAE8D654BEA21B7F54D3&jid=D3B4F771D1A06062008B4D0A2EF05996&aid=E7B9D9A0DA65C05C&yid=A732AF04DDA03BB3&vid=96C778EE049EE47D&iid=94C357A881DFC066&sid=2E41258BCB9A7DB2&eid=23410D0BDB501DF5&journal_id=1001-9014&journal_name=红外与毫米波学报&referenced_num=0&reference_num=9