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Characteristics of some nonlinear coherent wave structures in a collisionless weakly relativistic plasma with nonthermal electrons

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  • Kaur, Harvinder
  • Gill, Tarsem Singh
  • Saini, Nareshpal Singh

Abstract

In some recent on board space observations, it has been studied that high streaming ions play a major role on the physical mechanism for nonlinear wave structures. We have investigated here ion-acoustic solitons in a plasma with nonthermal electrons and weakly relativistic ions. Such plasmas occur in plasma sheet boundary layer of earth’s magnetosphere, Van-Allen belts. We have set up and solved KdV equation in a stationary frame to obtain the expression for the peak soliton amplitude and width. These quantities are significantly influenced by the relativistic effect, the nonthermal parameters and ratio of ion to electron temperatures. It is observed that for specific range of nonthermal parameter values, we observe compressive solitons and above which the rarefactive solitons are observed. The nonthermal parameter also affects the double layers.

Suggested Citation

  • Kaur, Harvinder & Gill, Tarsem Singh & Saini, Nareshpal Singh, 2009. "Characteristics of some nonlinear coherent wave structures in a collisionless weakly relativistic plasma with nonthermal electrons," Chaos, Solitons & Fractals, Elsevier, vol. 42(3), pages 1638-1645.
    • Handle: RePEc:eee:chsofr:v:42:y:2009:i:3:p:1638-1645
    DOI: 10.1016/j.chaos.2009.03.065
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    References listed on IDEAS

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    1. El-Shewy, E.K., 2007. "Linear and nonlinear properties of electron-acoustic solitary waves with non-thermal electrons," Chaos, Solitons & Fractals, Elsevier, vol. 31(4), pages 1020-1023.
    2. Lin, Mai-mai & Duan, Wen-shan, 2007. "Dust acoustic solitary waves in a dusty plasmas with nonthermal ions," Chaos, Solitons & Fractals, Elsevier, vol. 33(4), pages 1189-1196.
    3. El-Labany, S.K. & El-Shamy, E.F. & El-Taibany, W.F. & Moslem, W.M., 2007. "Dust-acoustic solitary waves in a two-temperature electrons with charge fluctuations and nonisothermal ions," Chaos, Solitons & Fractals, Elsevier, vol. 34(5), pages 1393-1400.
    4. El-Shamy, E.F., 2005. "Dust-ion-acoustic solitary waves in a hot magnetized dusty plasma with charge fluctuations," Chaos, Solitons & Fractals, Elsevier, vol. 25(3), pages 665-674.
    5. El-Labany, S.K. & El-Taibany, W.F. & El-Abbasy, O.M., 2007. "Nonlinear electron-acoustic waves with vortex-like electron distribution and electron beam in a strongly magnetized plasma," Chaos, Solitons & Fractals, Elsevier, vol. 33(3), pages 813-822.
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