Calculating the electron beam-wave interaction characteristics of traveling wave tubes(TWTs)is a crucial step in designing process.However,particle in cell(PIC)methods that solve Maxwell's equations using divided mesh grids are memory-intensive and time-consuming,leading to low efficiency in TWT development.In this paper,taking a sheet electron beam TWT as an example,this paper derive the space charge theory for a rectangular electron disk.By combining this with the electron motion e-quations and the excitation field equations,this paper establishes a one-dimensional frequency domain theory for the beam-wave in-teraction in sheet electron beam TWTs.By developing a program to solve the beam-wave interaction equations,this paper can quickly obtain results.This theory simplifies the beam-wave interaction system by neglecting the transverse motion of electrons and making certain approximations,thereby achieving accurate and rapid computation.The efficiency and reliability of the fast compu-tation program are validated by comparing its results with those from 3D full-wave electromagnetic simulation software and experi-mental data from a G-band TWT.
关键词
行波管/注波互作用/带状电子注/空间电荷场/快速计算程序
Key words
traveling wave tubes/beam-wave interaction/sheet electron beam/space charge field/rapid computation program
维普
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