One-dimensional theory of harmonically seeded free-electron laser

被引：1

作者：

Tiwari, Ganesh ^{[1
]}

机构：

[1] Brookhaven Natl Lab, Upton, NY 11973 USA

来源：

PHYSICAL REVIEW ACCELERATORS AND BEAMS | 2023年 / 26卷 / 06期

关键词：

AMPLIFIED SPONTANEOUS EMISSION; HIGH-GAIN REGIME; 3-DIMENSIONAL ANALYSIS; OUTPUT POWER; GENERATION; RADIATION;

D O I：

10.1103/PhysRevAccelBeams.26.060701

中图分类号：

O57 [原子核物理学、高能物理学];

学科分类号：

070202 ;

摘要：

We revisit free-electron laser (FEL) equations in the presence of a planar undulator to investigate effects on longitudinal FEL dynamics upon seeding by a harmonic. For this study, we adopt slowly varying phase approximation, collective variables, and Klimontovich description of particle beams to explore the effects of harmonic seeding on low-gain saturation, low-gain amplification, and exponential growth for on-axis radiation emission. We also investigate the effects of frequency detuning and nonzero energy spread on power gain and growth rate for low-gain and high-gain FELs, respectively.

引用

页数：16

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