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Paper   IPM / P / 8134
School of Physics
  Title:   Influence of Trapped Electrons on Ion-Acoustic Solitons in Non-Maxwellian Plasma
  Author(s): 
1.  H. Abbasi
2.  H. Hakimi Pajouh
  Status:   Preprint
  Journal:
  Year:  2006
  Supported by:  IPM
  Abstract:
In this paper, the particle trapping formalism is extended to the plasmas that their equilibrium state are specified by the non-Maxwellian (here kappa) distribution function. This is worthwhile because most of the space and some of laboratory plasmas are in the non-Maxwellian equilibrium. An analytical expression for the electron density, including the trapped electrons, is obtained. The ion-acoustic solitons are studied in this frame of work. It is shown that the deviation from Maxwellian plasma makes it possible for the stationary ion-acoustic solitons to move subsonically. Moreover, along with the κ variation, the study of transit processes associated with soliton properties from a non-Maxwellian distribution into a Maxwellian one is investigated.

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