刻周期半圆弧槽窗片对次级电子倍增效应的抑制

为了抑制高功率盒形窗内的次级电子倍增效应，研究了一种刻周期半圆弧槽窗片结构. 通过对槽内电场进行分析，证明了半圆弧状槽可以有效避免尖锐边界的局部场增强效应. 利用蒙特卡罗随机算法对槽内的次级电子倍增效应进行数值模拟，跟踪次级电子的轨迹及发展趋势，获得了不同槽宽所对应的抑制次级电子倍增最低电场强度. 讨论了法向电场对半圆弧槽抑制次级电子倍增的影响. 该结构有望在高功率速调管中获得应用. 关键词： 盒形窗 半圆弧槽 次级电子倍增 蒙特卡罗模拟

Suppression effect of p erio dic semicircle gro ove disk on multipactor

In this paper, the periodic semicircle groove disk is investigated to restrain the multipactor phenomenon in high power pill-box window. Through the theoretical analysis, the semicircle groove is proved to avoid the local field enhancement, which always exists in the vicinity of the sharp boundary groove. The proper groove width with a corresponding minimal suppression tangential electric field is achieved by simulating the multipactor procedure with Monte-Carlo algorithm. The effect of normal electric field is also analyzed. This configuration is to be applied to the high power klystron.
Keywords： pill-box window semicircle groove multipactor Monte-Carlo simulation