Fully 3D time-dependent simulation of free electron laser within an overmoded rectangular waveguide
Fully 3D time-dependent simulation of free electron laser within an overmoded rectangular waveguide
复制标题
过调制矩形波导内自由电子激光器的完全 3D 时间相关模拟
DOI：
10.1088/1748-0221/15/03/p03008
复制
发表时间：
2020-03-01
影响因子：
1.3
通讯作者：
Wang, L.
中科院分区：
文献类型：
--
作者：
Li, W.;Zhao, Z.;Wang, L.
数值模拟程序是设计自由电子激光器的基本工具。本文描述了一种数值方法，用于辐射波长远小于波导截止波长时，过模矩形波导自由电子激光器（FEL）的三维时变模拟。而不是开发一个新的代码，创世纪模拟代码修改为我们的目的。这里提出的这种方法可以用于扩展Genesis代码的容量，以覆盖这种特殊的配置。主要的修改是将波导壁上的边界条件应用于有限矩形区域内的稳态辐射场方程，并使用交替方向隐式（ADI）积分方案来求解场方程的全笛卡尔网格仍然采用。
Numerical simulation codes are basic tools for designing Free Electron Lasers (FELs). This paper describes a numerical approach for the time-dependent, three-dimensional simulation of the free electron laser (FEL) using a rectangular waveguide within overmoded configuration when the radiation wavelength is much shorter than the waveguide cut-off wavelength. Instead of developing a new code, the Genesis simulation code is modified for our purpose. This approach presented here can be used for extending the capacity of Genesis code to cover this special configuration. The major modification is to apply the boundary conditions on the waveguide walls to the steady-state radiation field equations in a limited rectangular region and the full Cartesian mesh using the Alternating Direction Implicit (ADI) integration scheme to solve the field equation remains adopted.