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The Evolution of the Radiation Pulse in a 3D Time-Dependent Free-Electron Laser
New Phys.: Sae Mulli 2018; 68: 353~357
Published online March 30, 2018;
© 2018 New Physics: Sae Mulli.

Soon-Kwon NAM*1, TaeHoon KIM1, Ki-Bum KIM2, Myo Myint AUNG3

1 Department of Physics, Kangwon National University, Chuncheon 24341, Korea
2 Institute of Liberal Education, Kangwon National University, Chuncheon 24341, Korea
3 Department of Physics, Kyaukse University, Kyaukse, Myanmar
Correspondence to:
Received August 8, 2017; Revised December 12, 2017; Accepted December 20, 2017.
cc This is an open-access article distributed under the terms of the Creative Commons Attribution Non-Commercial License ( which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.
We have developed a 3D time-dependent code to analyze of the evolution of a radiation pulse and have used that code to study the evolution of the radiation pulse in a three-dimensional time-dependent free-electron laser (3D time-dependent FEL). For the simulations, we used a wiggler length of 2 m, a wiggler period of 0.02 m, an electron beam energy of 50 MeV, an electron beam current of 50 A and a radiation wavelength of 2.54 $\mu$m. In particular, we have used the code that we developed to study the normal distribution function for the energy spread, the pulse shape of the emitted field versus time for a variety detuning parameters, the pulse shape of the emitted field versus the radiation wavelength for various times, and the gain versus pass for various times. 
PACS numbers: 41.60.Cr
Keywords: Evolution of the radiation pulse, 3D time-dependent code, Electron beam

March 2018, 68 (3)
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