Electromagnetic Particle Algorithm for Beam-Wave Interaction in Traveling Wave Tube of Symmetry

被引:1
|
作者
Zhou, Shuanghong [1 ]
Yao, Yuanlin [2 ]
Zhang, Yuting [3 ]
Ge, Bin [1 ]
机构
[1] Harbin Engn Univ, Coll Math Sci, Harbin 150001, Peoples R China
[2] Harbin Engn Univ, Coll Intelligent Syst Sci & Engn, Harbin 150001, Peoples R China
[3] Beijing Inst Spacecraft Syst Engn, 104 Youyi Rd, Beijing 100094, Peoples R China
来源
SYMMETRY-BASEL | 2022年 / 14卷 / 10期
关键词
cylindrical traveling wave tube; electromagnetic particle simulation; finite difference; MODEL;
D O I
10.3390/sym14102119
中图分类号
O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];
学科分类号
07 ; 0710 ; 09 ;
摘要
In many fields, such as space astrophysics, plasma and vacuum electronics, there are many nonlinear strong coupling physical problems. In order to solve the problem of electron beam-wave interaction in cylindrical Traveling wave tube (TWT) with symmetrical structure, a multi particle simulation algorithm for beam circuit is designed. The algorithm allows aperiodic time input, nonuniform linearity and large space diagnosis for different particles. In this algorithm, the field of coupled slow-wave transmission line is simulated by finite difference method. Assuming that there is strong coupling between the beam and the circuit, the space center equation of transmission along the line is obtained, and the space charge field is modeled considering the space charge effect, which can easily be ignored. The Particle In Cell (PIC) method of frog leaping step scheme is adopted to evaluate the electric field of each particle center, determine the circuit and space charge field, and design the termination part to compensate for the loss in order to avoid self-excited agitation. Finally, a simple numerical simulation is carried out for the electromagnetic problem and the accuracy of the code is checked against the electromagnetic simulator CHPIC. Therefore, the algorithm can be used to solve the problem of beam-wave interactions in a fixed structure (cylindrical) in multiple fields and can accurately record the data in the process.
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页数:15
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