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Effects of waveguides on a free-electron laser with two electron beams

Published online by Cambridge University Press:  20 November 2019

Soon-Kwon Nam Open the ORCID record for Soon-Kwon Nam [Opens in a new window]  and
Yunseong Park
Soon-Kwon Nam*
Affiliation:
Department of Physics, Kangwon National University, Chunchon24341, Korea
Yunseong Park
Affiliation:
Department of Physics, Kangwon National University, Chunchon24341, Korea
*
Author for correspondence: Soon-Kwon Nam, Department of Physics, Kangwon National University, Chunchon24341, Korea, E-mail: snam@kangwon.ac.kr
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Abstract

The effects of the phase variation, the evolution of the electron beam, the evolution of the radiation intensity, and the higher-order modes due to waveguides on a free-electron laser (FEL) oscillator have been analyzed by using two electron beams of different energies based on the proposed FEL facility which is to be operated in the far-infrared and infrared regions. The three-dimensional (3D) effects on a FEL oscillator due to waveguides and higher-order modes were studied using an extended 3D FEL code with two electron beams that we have developed. The effects of the variation on the amplitude of radiation on the electron beam's emittance and energy spreads were also calculated in the case of waveguide for multi-particle and multi-pass numbers by using a new 3D code. The phase variation, the variation in the beam envelope, the evolution of the amplitude, and power were calculated for the fundamental mode. The results were compared with those of the higher-order modes of the wiggler for various TE and TM modes for determining the FEL's performance which is required for high-quality electron beams.

Keywords

Free-electron laserTE and TM modestwo electron beamswaveguide
Type
Research Article
Information
Laser and Particle Beams , Volume 37 , Issue 4 , December 2019 , pp. 386 - 391
Copyright
Copyright © Cambridge University Press 2019

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