FREE-ELECTRON LASERS - SPONTANEOUS EMISSION OF ELECTRONS WITH CHAOTIC ORBITS

被引：17
作者：
SPINDLER, G
RENZ, G
机构：
[1] Institut für Technische Physik, German Aerospace Research Establishment (DLR)
来源：
PHYSICS OF FLUIDS B-PLASMA PHYSICS | 1991年 / 3卷 / 12期
关键词：
D O I：
10.1063/1.859729
中图分类号：
O35 [流体力学]; O53 [等离子体物理学];
学科分类号：
070204 ; 080103 ; 080704 ;
摘要：
A single-particle computer model is used to calculate the electron trajectories. in combined helical wiggler and guide fields. The analysis considers the effects of a realizable wiggler field. Special attention is focused on the stability of the electron orbits near magnetoresonance. Upon calculating Poincare surface-of-section plots and Lyapunov exponents, it is shown that the electron dynamics is chaotic. Analyzing the spectra of spontaneous emission, it is found that regular and chaotic orbits might be discriminated by optical measurements: off resonance, the spectra consist of well-defined lines. On the other hand, near magnetoresonance, chaotic orbits are revealed by noisy spectra concentrated at low frequencies, and a sudden breakdown of the integral radiant energy.
引用
收藏
页码：3517 / 3523
页数：7
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