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https://doi.org/10.3938/NPSM.68.1157
2D Simulations for Wiggler Errors in a Free-Electron Laser
New Phys.: Sae Mulli 2018; 68: 1157~1161
Published online October 31, 2018;  https://doi.org/10.3938/NPSM.68.1157
© 2018 New Physics: Sae Mulli.

Soon-Kwon NAM*, Yun Seong PARK

Department of Physics, Kangwon National University, Chunchon 24341, Korea
Correspondence to: snam@kangwon.ac.kr
Received July 2, 2018; Revised July 16, 2018; Accepted July 24, 2018.
cc This is an open-access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/by-nc/3.0/) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.
Abstract
We developed an extended 2D time-independent free-electron laser (2D time-independent FEL) code to calculate the intensity of the radiation field and the spot size in a free-electron laser oscillator. The intensity of the radiation field and the spot size due to the wiggler errors in a free-electron laser oscillator were analyzed by using the extended 2D time-independent FEL code that we developed. An electron beam energy of 10 MeV, electron beam current of 20 A, wiggler perid of 2 cm and wiggler field of 0.1 to 0.5 T were used in the simulations. The effects of the wiggler error on a magnetic field in the range of 0.1 - 0.5 T were investigated for wiggler field errors of 0.1 to 0.4%. The spot sizes for various magnetic fields were optimized for various wiggler field errors. The intensity of the radiation field due to wiggler errors in the range of 0.1 to 0.4% was calculated and optimized. The intensity of the radiation field due to a wiggler errors of 0.4% was reduced by about 24% compared to that of the radiation field due to a wiggler error of 0.1%.
PACS numbers: 41.60.Cr
Keywords: Intensity of the radiation field, 2D time-independent code, Spot size


October 2018, 68 (10)
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