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Paper   IPM / Physic / 7390
School of Physics
  Title:   Relativistic Raman Backscattering Theory with Application in Free-Electron Lasers with Helical Wiggler and Axial Magnetic Field
  Author(s): 
1.  A. Kordbacheh
2.  B. Maraghechi
3.  H. Aghahosseini
  Status:   Published
  Journal: Phys. Plasmas
  No.:  9
  Vol.:  11
  Year:  2004
  Pages:   4483-4488
  Supported by:  IPM
  Abstract:
A relativistic theory for Raman backscaterring, in the beam frame of electrons, is presented and is used to find the growth rate of a free-electron laser in Raman regime. The effect of the self-electic and self-magnetic fields, on the equilibrium trajectories of electrons, are taken into account. The wiggler effects, on the linear dispersion relations of the space-charge wave and radiation, are included in the analysis. A numerical computation is conducted to investigate the wiggler and self-field effects on the growth rate.The results of the relativistic and nonrelativistic treatments are compared

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