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Paper   IPM / P / 7299
School of Physics
  Title:   Near Steady-State Orbits and Injection in Free Electron Laser with Ion-Channel Guiding
1.  S. Mirzanejhad
2.  P. Maraghechi
3.  B. Maraghechi
  Status:   Published
  Journal: Phys. Plasmas
  No.:  6
  Vol.:  11
  Year:  2004
  Pages:   3047-3052
  Supported by:  IPM
A numerical and an analytical investigation of near-steady state orbits in free electron laser (FEL) with ion-channel guiding are carried out and two kinds of orbits are found. Injection of electrons is studied numerically using adiabatically tapered wiggler field and ion-channel density. A considerable reduction in amplitude of oscillations about steady-state orbits was found. Near steady-state orbits, to second order in wiggler induced velocity, is found in FEL with axial magnetic field guiding.

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