Improvement of nonlinear harmonics in free electron laser with planar wiggler

被引：3

作者：

Bazouband, F. ^{[1
]}

Maraghechi, B. ^{[1
]}

机构：

[1] Amirkabir Univ Technol, Dept Phys, Tehran 158754413, Iran

来源：

PHYSICS OF PLASMAS | 2012年 / 19卷 / 11期

关键词：

DISPERSION-RELATION; POLARIZED WIGGLER; CHANNEL; GENERATION; BEAM; GAIN; FEL; TRAJECTORIES; SIMULATION; RADIATION;

D O I：

10.1063/1.4766471

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：

Spontaneous emission of free electron laser with planar wiggler and ion-channel guiding is calculated analytically and possibility of emission at up-shifted wiggler or ion-channel betatron frequency and their harmonics has been found. To investigate the nonlinear odd harmonics, a set of self-consistent nonlinear differential equations that governs the evolution of radiation and electron beam are derived and solved numerically by Runge-Kutta method. Using the simulation code, gain improvement of third harmonic is studied in the range of microwave frequency by applying ion-channel guiding for a cold beam. It is shown that the combination of the ion-channel and a prebunched electron beam increases the amplitude of the third harmonic of the radiation and decreases its saturation length. The relation between the linear and nonlinear harmonics is discussed. (C) 2012 American Institute of Physics. [http://dx.doi.org/10.1063/1.4766471]

引用

页数：9

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