Nonlinear propagation of cylindrical and spherical electron-acoustic solitons in an unmagnetized plasma consisting cold electron fluid, hot electrons obeying a nonextensive distribution and stationary ions, are investigated. For this purpose, the standard reductive perturbation method is employed to derive the cylindrical/spherical Korteweg-de-Vries equation, which governs the dynamics of electron-acoustic solitons. The effects of nonplanar geometry and nonextensive hot electrons on the behavior of cylindrical and spherical electron acoustic solitons are also studied by numerical simulations. (C) 2011 American Institute of Physics. [doi:10.1063/1.3622207]
机构:
Port Said Univ, Fac Sci, Dept Phys, Port Said, EgyptPort Said Univ, Fac Sci, Dept Phys, Port Said, Egypt
El-Awady, E. I.
Moslem, W. M.
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Port Said Univ, Fac Sci, Dept Phys, Port Said, Egypt
Ruhr Univ Bochum, Fac Phys & Astron, Int Ctr Adv Studies Phys Sci, D-44780 Bochum, GermanyPort Said Univ, Fac Sci, Dept Phys, Port Said, Egypt