Cosmic ray spectrum from diffusive shock acceleration |
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| Authors: | Hyesung Kang Dongsu Ryu |
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| Institution: | 1.Department of Physics,Ferdowsi University of Mashhad,Mashhad,Iran;2.Department of Physics,Islamic Azad University,Bojnourd,Iran |
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| Abstract: | Nonlinear propagation of cylindrical and spherical dust-acoustic solitons in an unmagnetized dusty plasma consisting of cold
dust grains, superthermal ions and electrons 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 dust-acoustic solitons.
The effects of nonplanar geometry and superthermal distributions on the cylindrical and spherical dust acoustic solitons structures
are also studied by numerical calculation of the cylindrical/spherical Korteweg-de-Vries equation. |
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