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Paper   IPM / Physic / 6887
School of Physics
  Title:   Modulational Instability of the Electron Cyclotron Waves in An Adiabatic Wave-Particle Interaction
  Author(s): 
1.  H. Hakimi Pajouh
2.  H. Abbasi
  Status:   Published
  Journal: Problems of Atomic Science and Technology, Plasma Physics
  No.:  122
  Vol.:  7
  Year:  2002
  Pages:   No. 4, 112-114
  Supported by:  IPM
  Abstract:
Modulational instability of a circularly polarized electromagnetic wave, propagation along an external constant magnetic field in plasma is investigated. the method is based on the derivation of a nonlinear Schrodinger equation, which contains nonlinear terms associated with trapped electrons and also relativistic electron quiver velocity. Among different mechanisms of trapping the collision-less process is considered. Since we are interested in characteristic spatial scales larger than the Debye length, the condition of quasi-neutrality is assumed. The maximum growth rate is calculated and the result shows that the trapped particles prevent the spatial localization of the electron cyclotron waves.

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