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Interaction of Electron Beams and Polarized Radiation in a Two-Beam Free-Electron Laser

Author

Listed:
  • Soon-Kwon Nam

    (Department of Physics, Kangwon National University, Chunchon 24341, Korea)

  • Yunseong Park

    (Department of Physics, Kangwon National University, Chunchon 24341, Korea)

Abstract

Recent research has focused on shorter pulses, new spectral ranges, higher photon fluxes, and the production of photons with a variety of polarizations. A time-dependent three-dimensional free-electron laser oscillator code was developed for a two-beam free-electron laser system with an elliptically polarized undulator. Characteristics of the interaction of the electron beams and polarized radiation in the XUV region were studied using this code. The code utilized an optical field using the spectral method in the paraxial approximation by a fast Fourier transformation, a Gaussian modal expansion for the optical field, and Newton–Lorentz force equations for particle tracking. As the emittance was increased, the degrees of polarization of the single-beam system with an elliptically polarized undulator and the two-beam system with a planar undulator were decreased significantly compared to those of a two-beam system with an elliptically polarized undulator in the XUV regions. The radiation intensities, the evolutions of the radiation power for wavelength, and the time in the two-beam system were increased significantly compared to those of a single-beam system. The statistical simulation result for the distribution of the number of shots in the degrees of polarization in the two-beam system was much better than that of the case with the single-beam system.

Suggested Citation

  • Soon-Kwon Nam & Yunseong Park, 2022. "Interaction of Electron Beams and Polarized Radiation in a Two-Beam Free-Electron Laser," Energies, MDPI, vol. 15(10), pages 1-25, May.
    • Handle: RePEc:gam:jeners:v:15:y:2022:i:10:p:3703-:d:818510
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