Improvement of nonlinear harmonics in free electron laser with planar wiggler

Journal Article · Thu Nov 15 04:00:00 EST 2012 · Physics of Plasmas

DOI:https://doi.org/10.1063/1.4766471· OSTI ID:22072599

Bazouband, F; Maraghechi, B ^[1]

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1. Department of Physics, Amirkabir University of Technology, Post code 15875-4413, Tehran (Iran, Islamic Republic of)

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.

• OSTI ID: 22072599
• Journal Information: Physics of Plasmas, Journal Name: Physics of Plasmas Journal Issue: 11 Vol. 19; ISSN PHPAEN; ISSN 1070-664X
• Country of Publication: United States
• Language: English

Related Subjects

43 PARTICLE ACCELERATORS
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
BEAM BUNCHING
BETATRONS
COMPUTERIZED SIMULATION
DIFFERENTIAL EQUATIONS
ELECTRON BEAMS
FREE ELECTRON LASERS
HARMONIC GENERATION
IONS
MICROWAVE RADIATION
NONLINEAR PROBLEMS
RUNGE-KUTTA METHOD