The effect of wiggler imperfections on nonlinear harmonic generation in free-electron lasers

被引：8

作者：

Freund, HP ^{[1
]}

Biedron, SG

Milton, SV

Nuhn, HD

机构：

[1] Sci Applicat Int Corp, Mclean, VA 22102 USA

[2] Argonne Natl Lab, Adv Photon Source, Argonne, IL 60439 USA

[3] Univ Lund, MAX Lab, S-22100 Lund, Sweden

[4] Stanford Linear Accelerator Ctr, Stanford, CA 94309 USA

来源：

IEEE JOURNAL OF QUANTUM ELECTRONICS | 2001年 / 37卷 / 06期

关键词：

electromagnetic radiation; electron beam applications; free-electron lasers; frequency conversion; frequency-domain analysis; nonlinearities; nonlinear differential equations; simulation;

D O I：

10.1109/3.922776

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

The generation of harmonics through a nonlinear mechanism driven by bunching at the fundamental has sparked interest in using this process as a path toward an X-ray free-electron laser (FEL). An important issue in this regard is the sensitivity of the nonlinear harmonic generation to wiggler imperfections. Typically, linear instabilities in FELs are characterized by increasing sensitivity to both electron beam and wiggler quality with increasing harmonic number. However, since the nonlinear harmonic generation mechanism is driven by the growth of the fundamental, the sensitivity of the nonlinear harmonic mechanism is not severely greater than that of the fundamental. in this paper, we study the effects of wiggler imperfections on the nonlinear harmonics in a 1.5-Angstrom FEL, and show that the decline in the third harmonic emission with increasing levels of niggler imperfections roughly tracks that of the fundamental.

引用

页码：790 / 793

页数：4