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基于粒子模拟技术研究了螺旋线行波管的时域非线性理论,慢波结构中的场通过螺旋带模型求解得到,并考虑了夹持杆和屏蔽桶的影响,推导得到了注-波互作用的动理学方程;聚焦磁场可以是直流磁场也可以是周期永磁场;用泊松方程求解得到空间电荷场;注-波互作用方程用MacCormack的差分格式进行计算。给出了时域计算得到的瞬态特性,并与基于一维Christine及三维Christine理论的计算结果进行了比较。
The time domain nonlinear theory of helical traveling wave tube is studied based on the particle simulation technique. The field in the slow wave structure is solved by the spiral belt model, and the influence of the clamping rod and the shield barrel is considered. Action kinetic equation; focus magnetic field can be DC magnetic field can also be a periodic permanent magnetic field; Poisson equation obtained by space charge field; Note - wave interaction equation using MacCormack differential format calculation. The transient characteristics calculated in the time domain are given and compared with those based on one-dimensional Christine and three-dimensional Christine theory.