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Beam–Wave Interaction Analysis Inside an Azimuthally Partitioned Axially Periodic Disk-Loaded Coaxial Structure for Bifrequency MILO
IEEE Transactions on Plasma Science ( IF 1.5 ) Pub Date : 2021-03-10 , DOI: 10.1109/tps.2021.3062549
Arjun Kumar , Prabhakar Tripathi , Smrity Dwivedi , P. K. Jain

In this article, the electromagnetic (or RF) behavior of the azimuthally partitioned axially periodic metal disk-loaded coaxial structure was investigated using an equivalent circuit approach in the presence of the electron beam. In the analysis, the linearized Maxwell’s fluid equation (also known as Vlasov–Maxwell’s equation) was used to analyze the region in which the electron beam was present. The expression for the equivalent series inductance and shunt capacitance per unit length for the equivalent transmission line was derived in the electron beam present and absent case. The derived expressions include all the harmonics effects present inside the structure. Furthermore, the expression of the dispersion relation and temporal growth rate (TGR) was derived using the calculated equivalent series inductance and equivalent shunt capacitance. The output RF power and energy were also calculated analytically and validated through the PIC simulation. The results were compared with the already reported literature, and the relative error between them was below 5%. In addition, the effect of different beam parameters on the TGR behavior was also analyzed.

中文翻译:

双频MILO的方位角分配的轴向周期性圆盘加载同轴结构内部的束波相互作用分析

在本文中,在电子束存在的情况下,使用等效电路方法研究了沿方位角分隔的轴向周期性金属盘负载同轴结构的电磁(或RF)行为。在分析中,使用线性化的麦克斯韦流体方程(也称为弗拉索夫-麦克斯韦方程)来分析存在电子束的区域。在存在和不存在电子束的情况下,得出了等效传输线每单位长度的等效串联电感和并联电容的表达式。导出的表达式包括结构内部存在的所有谐波效应。此外,使用计算出的等效串联电感和等效并联电容,得出了色散关系和时间增长率(TGR)的表达式。输出的RF功率和能量也经过分析计算,并通过PIC仿真进行了验证。将结果与已经报道的文献进行比较,它们之间的相对误差在5%以下。此外,还分析了不同光束参数对TGR行为的影响。
更新日期:2021-04-13
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