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Cylindrical and spherical dust-acoustic wave modulations in dusty plasmas with non-extensive distributions

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Abstract

The nonlinear wave modulation of planar and non-planar (cylindrical and spherical) dust-acoustic waves (DAW) propagating in dusty plasmas, in the presence of non-extensive distributions for ions and electrons is investigated. By employing multiple scales technique, a cylindrically and spherically modified nonlinear Schrödinger equation (NLSE) is derived. The presence of hot non-extensive q-distributed ions and electron is shown to influence the modulational instability (MI) of the waves. It is shown that the properties of the MI of DAW in cylindrical and spherical geometry differ from those in a planar one-dimensional geometry. Furthermore, it is observed that the non-extensive distributed ions have more effect on the MI of the DAW than electrons. Also, it is found that there is a MI period for cylindrical and spherical wave modulations, which does not exist in the one-dimensional case.

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Authors and Affiliations

  1. Department of Physics, Faculty of Sciences, Arak University, Arak, 38156 8 8349, Iran

    M EGHBALI & B FAROKHI

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  1. M EGHBALI
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  2. B FAROKHI
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Correspondence to M EGHBALI.

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EGHBALI, M., FAROKHI, B. Cylindrical and spherical dust-acoustic wave modulations in dusty plasmas with non-extensive distributions. Pramana - J Phys 84, 637–651 (2015). https://doi.org/10.1007/s12043-014-0866-7

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  • DOI: https://doi.org/10.1007/s12043-014-0866-7

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