Cylindrical and spherical Gardner solitons and double layers in a dusty electronegative nonthermal plasma with two-temperature electrons

doi:10.1088/1674-1056/22/7/075201

中国物理B ›› 2013, Vol. 22 ›› Issue (7): 75201-075201.doi: 10.1088/1674-1056/22/7/075201

• PHYSICS OF GASES, PLASMAS, AND ELECTRIC DISCHARGES • 上一篇下一篇

Cylindrical and spherical Gardner solitons and double layers in a dusty electronegative nonthermal plasma with two-temperature electrons

T. Akhter^a, M. M. Hossain^b, A. A. Mamun^a

a Department of Physics, Jahangirnagar University, Savar, Dhaka-1342, Bangladesh;
b Department of Electrical and Electronic Engineering, Bangladesh University of Business and Technology, Dhaka-1216, Bangladesh

收稿日期:2012-10-24 修回日期:2012-12-11 出版日期:2013-06-01 发布日期:2013-06-01

Cylindrical and spherical Gardner solitons and double layers in a dusty electronegative nonthermal plasma with two-temperature electrons

T. Akhter^a, M. M. Hossain^b, A. A. Mamun^a

a Department of Physics, Jahangirnagar University, Savar, Dhaka-1342, Bangladesh;
b Department of Electrical and Electronic Engineering, Bangladesh University of Business and Technology, Dhaka-1216, Bangladesh

Received:2012-10-24 Revised:2012-12-11 Online:2013-06-01 Published:2013-06-01
Contact: M. M. Hossain E-mail:manir_phys@yahoo.com

摘要/Abstract

摘要： A precise theoretical investigation has been made on the cylindrical and spherical (nonplanar) Gardner solitons (GSs) and double layers (DLs) in a dusty electronegative plasma (composed of inertial positive and negative ions, Maxwellian cold electrons, non-thermal hot electrons, and negatively charged static dust). The reductive perturbation method has been used in derivation of the modified Gardner (MG) equation describing the nonlinear propagation of the dust ion-acoustic (DIA) waves. The MG equation admits solitary waves (SWs) and DLs solutions for σ around its critical value σ_c (where σ_c is the value of σ corresponding to the vanishing of the nonlinear coefficient of the Korteweg de-Vries (K-dV) equation). The nonplanar SWs and DLs solutions are numerically analyzed and the parametric regimes for the existence of the positive as well as negative SWs and negative DLs are obtained. The basic features of nonplanar DIA SWs and DLs, which are found to be different from planar ones, are also identified. The implications of our results to different space and laboratory dusty plasma situations, are discussed.

关键词: electronegative plasma, two-temperature electrons, Garner solitons, double layers

Abstract: A precise theoretical investigation has been made on the cylindrical and spherical (nonplanar) Gardner solitons (GSs) and double layers (DLs) in a dusty electronegative plasma (composed of inertial positive and negative ions, Maxwellian cold electrons, non-thermal hot electrons, and negatively charged static dust). The reductive perturbation method has been used in derivation of the modified Gardner (MG) equation describing the nonlinear propagation of the dust ion-acoustic (DIA) waves. The MG equation admits solitary waves (SWs) and DLs solutions for σ around its critical value σ_c (where σ_c is the value of σ corresponding to the vanishing of the nonlinear coefficient of the Korteweg de-Vries (K-dV) equation). The nonplanar SWs and DLs solutions are numerically analyzed and the parametric regimes for the existence of the positive as well as negative SWs and negative DLs are obtained. The basic features of nonplanar DIA SWs and DLs, which are found to be different from planar ones, are also identified. The implications of our results to different space and laboratory dusty plasma situations, are discussed.

Key words: electronegative plasma, two-temperature electrons, Garner solitons, double layers

中图分类号: (Multicomponent and negative-ion plasmas)

52.27.Cm

52.35.Fp (Electrostatic waves and oscillations (e.g., ion-acoustic waves)) 52.35.Mw (Nonlinear phenomena: waves, wave propagation, and other interactions (including parametric effects, mode coupling, ponderomotive effects, etc.))

T. Akhter, M. M. Hossain, A. A. Mamun. Cylindrical and spherical Gardner solitons and double layers in a dusty electronegative nonthermal plasma with two-temperature electrons[J]. 中国物理B, 2013, 22(7): 75201-075201.

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Cylindrical and spherical Gardner solitons and double layers in a dusty electronegative nonthermal plasma with two-temperature electrons

Cylindrical and spherical Gardner solitons and double layers in a dusty electronegative nonthermal plasma with two-temperature electrons

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