强激光与粒子束2012，Vol.24Issue(1)：225-228,4.DOI:10.3788/HPLPB20122401.0225
低速度零散会切电子枪的设计和数值仿真
Design and simulation of low-velocity-spread cusp electron gun
摘要
Abstract
The Lagrangian formula is used to analyze the velocity spread and beam ripple of electrons in smooth cusp magnetic field. The characteristics of the cusp electron gun including cusp magnets are calculated by co-simulation employing softwares Matlab and Magic. A Matlab code is written to simulate the motion of single electron in a given electric field ? and a given magnetic field, which shows the relationship between the electron's radial velocity and velocity spread. The cusp magnetic field optimized accordingly can reduce the radial velocity at the anode region, which is the key to achieve small beam velocity spread. When the cusp electron gun is designed to generate a 1 A, 30 keV beam, an optimized velocity spread less than 2. 5% can be obtained with an axial velocity spread less than 8. 5 % and a velocity ratio about 2.关键词
大回旋电子束/会切电子枪/速度零散/会切磁场/回旋行波管Key words
large-orbit axis-encircling beam/cusp electron gun/velocity spread/cusp magnetic field/gyro-traveling-wave tube分类
信息技术与安全科学引用本文复制引用
马强,蒙林,殷勇,严文韬..低速度零散会切电子枪的设计和数值仿真[J].强激光与粒子束,2012,24(1):225-228,4.基金项目
国家自然科学基金项目(60971034,41104097) （60971034,41104097）
中央高校基本科研业务费专项资金项目(ZYGX2011J045) （ZYGX2011J045）
