Nonlinear analysis of self-field effects in free-electron lasers

被引：0

作者：

Freund, H.P. ^{[1
]}

Jackson, R.H. ^{[1
]}

Pershing, D.E. ^{[1
]}

机构：

[1] Science Applications Int Corp, McLean, United States

来源：

Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment | 1994年 / A341卷 / 1-3期

关键词：

Beam transport system - Helical wiggler - Nonlinear analysis - Particle in cell simulation - Planar wiggler - Self field effects - Space charge depression - Three dimensional Lorentz force equation;

D O I：

暂无

中图分类号：

学科分类号：

摘要：

A model of the DC self-fields associated with the electron beam is incorporated into 3-dimensional nonlinear formulations of free-electron lasers. The nonlinear formulations are based upon the ARACHNE and WIGGLIN codes which are slow-time-scale formulations for the evolution of the amplitudes and phases of a multi-mode superposition of vacuum waveguide modes. The electron dynamics in these codes are treated by means of the complete 3-dimensional Lorentz force equations, and the representations for the self-fields are incorporated directly into this formulation. Results of the simulations are compared with experiments at LLNL using a planar wiggler, and at MIT and NRL which used helical wigglers. These experiments exhibited comparable space-charge depressions of Δγself/γ0 0.53-0.78% across the beam. The simulations are in reasonable agreement with the experiments.

引用

页码：259 / 264