scholarly journals Resonator stability and higher-order modes in free-electron laser oscillators

2014 ◽  
Vol 17 (8) ◽  
Author(s):  
Abhishek Pathak ◽  
Srinivas Krishnagopal
Keyword(s):  
Free Electron ◽  
Free Electron Laser ◽  
Higher Order ◽  
Higher Order Modes ◽  
Laser Oscillators

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

2019 ◽  
Vol 37 (4) ◽  
pp. 386-391 ◽  
Author(s):  
Soon-Kwon Nam ◽  
Yunseong Park
Keyword(s):  
Free Electron ◽  
Free Electron Laser ◽  
Electron Beams ◽  
Three Dimensional ◽  
Phase Variation ◽  
Far Infrared ◽  
Higher Order ◽  
Higher Order Modes ◽  
3D Effects ◽  
Beam Envelope

AbstractThe 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.

scholarly journals Effects of wiggler error in a free-electron laser oscillator with two electron beams

2018 ◽  
Vol 36 (4) ◽  
pp. 448-453 ◽  
Author(s):  
Soon-Kwon Nam
Keyword(s):  
Free Electron ◽  
Free Electron Laser ◽  
Electron Beams ◽  
Three Dimensional ◽  
Parabolic Type ◽  
Far Infrared ◽  
Higher Order ◽  
Higher Order Modes ◽  
Constant Type ◽  
3D Effects

AbstractWe have analyzed the effects of the wiggler error due to the electron beam's emittance, energy spreads, and higher-order modes in a free-electron laser (FEL) oscillator by using two electron beams of different energies based on the proposed FEL facility which is operated at a far-infrared and infrared regions. The three-dimensional (3D) effects in a FEL oscillator due to the wiggler error were calculated and an evaluation of the effect of the beam's emittance and energy spread was performed for the case of the coupled two-beam oscillator for phase shift errors and wiggler errors. The mode construction was studied on the higher-order modes of the wiggler for the various wiggler error parameters for FEL performance which is required for the high-quality electron beam. The radiation intensity at the fundamental mode was calculated for the rms phase shake in wiggler errors with sinus type, constant type, and parabolic type in the two-beam oscillator system using the 3D calculations. The results are compared with those of the fundamental modes without wiggler errors.

scholarly journals Numerical simulations of free electron laser oscillators

1989 ◽  
Vol 285 (1-2) ◽  
pp. 186-191 ◽  
Author(s):  
B.D. McVey ◽  
J.C. Goldstein ◽  
R.L. Tokar ◽  
C.J. Elliott ◽  
S.J. Gitomer ◽  
...  
Keyword(s):  
Numerical Simulations ◽  
Free Electron ◽  
Free Electron Laser ◽  
Laser Oscillators

Nonlinear analyses for optimized short‐period‐wiggler free‐electron laser oscillators

1989 ◽  
Vol 65 (4) ◽  
pp. 1453-1459 ◽  
Author(s):  
J. H. Booske ◽  
A. Serbeto ◽  
T. M. Antonsen ◽  
B. Levush
Keyword(s):  
Free Electron ◽  
Free Electron Laser ◽  
Nonlinear Analyses ◽  
Short Period ◽  
Laser Oscillators

Gain and saturation in free-electron laser oscillators

1997 ◽  
Vol 55 (2) ◽  
pp. 1887-1893 ◽  
Author(s):  
Vinit Kumar ◽  
Srinivas Krishnagopal
Keyword(s):  
Free Electron ◽  
Free Electron Laser ◽  
Laser Oscillators
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