摘要
研究了行波管中直流空间电荷场导致的电位下沉效应,计算了谐波与电子注的相互作用,并利用三维“塑性”宏粒子模型计算了交变空间电荷场,同时考虑了有限聚焦磁场。基于上述改进的行波管三维非线性理论,开发了可动态实时显示行波管工作状态的可视化科学计算软件,并利用该软件分析了电位下沉效应、空间电荷力、谐波对行波管性能的影响,得到了与实验测试更吻合的计算结果。
A three-dimensional （3D） nonlinear theory of traveling wave tubes （TWTs） is developed, which includes fundamental radio frequency （RF） and harmonic, When the instantaneous bandwidth exceeds octave, the harmonic is generated and the mutual coupling between harmonic and fundamental RF can be observed in TWTs due to nonlinear interaction between electron beam and RF. At low frequencies the harmonic has an obvious effect. Based upon Tien＇s disc model, a plastic 3D super-particle model is proposed to improve the nonlinear analysis of TWT. Numerical results by employing a periodic magnetic focusing field are oresented including voltaire sinking.
出处
《电子科技大学学报》
EI
CAS
CSCD
北大核心
2005年第5期630-633,共4页
Journal of University of Electronic Science and Technology of China
基金
国防科技重点实验室基金资助项目(51440020203DZ02
51440040204DZ0203)
关键词
行波管
三维
非线性理论
模拟
traveling wave tubes
three dimension
nonlinear theory
simulation
