Electrostatic Double Layers in a Multicomponent Drifting Plasma Having Nonthermal Electrons

Ghosh, Basudev; Paul, S. N.; Das, Chandana; Banerjee, Sudeshna Ghosh

doi:10.1007/s13538-012-0115-9

Cited by 6 publications

(3 citation statements)

References 34 publications

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“…In the last few years, ion acoustic solitary waves (SWs) and double layers (DLs) have been theoretically studied by various authors considering different parameters in plasma, e.g., ion temperature, two-temperature electrons, positrons, beam ions, and magnetic field. But, the presence of negative ions [1][2][3] and nonthermal electrons [4][5][6][7][8] in plasma is found to be most interesting on the formation of SWs and DLs. It is noted that most of the works are done in an infinite or unbounded plasma.…”

Section: Introductionmentioning

confidence: 99%

Effects of Boundary of Cylindrical Waveguide and Nonthermal Electrons on the Ion Acoustic Double Layers in Multicomponent Bounded Plasma

2020

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Ion acoustic double layers in a multicomponent plasma consisting of positive ions, negative ions, and nonthermal electrons filled in a cylindrical waveguide have been theoretically investigated using pseudopotential technique. The expression of Sagdeev potential for the ion acoustic wave in such a plasma has been derived, and the conditions for the existence of double layers are obtained. The effects of the boundary of cylindrical waveguide and nonthermal electrons on the Sagdeev potential have been graphically discussed. From the nonlinear equation, the solution for double layers of small amplitude ion acoustic waves is obtained, and the structure of double layers is analyzed as function of the plasma parameters. It is seen that finite geometry of bounded plasma, nonthermality of electrons, density of negative ions, and stream velocity of positive and negative ions have significant contribution on the structure of double layers. The double layers may be compressive or rarefactive in plasma depending upon the values of the plasma parameters.

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Section: Introductionmentioning

confidence: 99%

Effects of Boundary of Cylindrical Waveguide and Nonthermal Electrons on the Ion Acoustic Double Layers in Multicomponent Bounded Plasma

2020

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“…In a study related to ion acoustic double layers in magnetospheric and auroral plasmas, multi-drifting components were considered with nonthermal electrons. 27 There are extensive studies on shock waves in the presence of kappa distributed electrons and ions. [28][29][30][31][32][33] In plasmas with super thermal electrons, it was found that spectral index changes the amplitude of the dust acoustic shock waves significantly.…”

Section: Introductionmentioning

confidence: 99%

Effect of ion drift on shock waves in an un-magnetized multi-ion plasma

Sijo¹,

Manesh

et al. 2018

OAJMTP

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We investigate the effect of the drift velocity of lighter ions on shock waves in an unmagnetized multi-component plasma. Solar origin hot electrons and lighter ions, positively and negatively charged heavier ions and cometary origin colder electrons form the multicomponent plasma. Using the reductive perturbation technique, we have derived the KdVB (Korteweg-deVries-Burgers) equation and its shock wave solution is plotted for different plasma parameters relevant to comet Halley. We find that the strength of the shock profile decreases with increasing drift velocities of the lighter ions and kappa indices of the two components of electrons. On the other hand, the amplitude of the shock increases with increasing kinematic viscosities and densities of the lighter ions. Also, different coefficients of the KdVB equation are strongly affected by the drift velocities of the lighter ions.

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“…The presence of non-Maxwellian electron is common in space and astrophysical plasmas including the magnetosphere [12] and auroral zones [14]. The presence of such non-Maxwellian electrons gives rise to many interesting characteristics in the nonlinear propagation of waves including the ion-acoustic solitons [15,16]. The solitary structures with density depression in the magnetosphere observed by the Freja satellites [17,18] have been explained by Cairns et al [19] by assuming electron distribution to be nonthermal.…”

Section: Introductionmentioning

confidence: 99%

Modulation Instability of Ion-Acoustic Waves in Plasma with Nonthermal Electrons

Ghosh

Banerjee

2014

Journal of Astrophysics

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Modulational instability of ion-acoustic waves has been theoretically investigated in an unmagnetized collisionless plasma with nonthermal electrons, Boltzmann positrons, and warm positive ions. To describe the nonlinear evolution of the wave amplitude a nonlinear Schrödinger (NLS) equation has been derived by using multiple scale perturbation technique. The nonthermal parameter, positron concentration, and ion temperature are shown to play significant role in the modulational instability of ion-acoustic waves and the formation of envelope solitons.

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Electrostatic Double Layers in a Multicomponent Drifting Plasma Having Nonthermal Electrons

Abstract: How to citeComplete issue More information about this article Journal's homepage in redalyc.org Scientific Information System Network of Scientific Journals from Latin America, the Caribbean, Spain and Portugal Non-profit academic project, developed under the open access initiative

Cited by 6 publications

References 34 publications

Effects of Boundary of Cylindrical Waveguide and Nonthermal Electrons on the Ion Acoustic Double Layers in Multicomponent Bounded Plasma

Effects of Boundary of Cylindrical Waveguide and Nonthermal Electrons on the Ion Acoustic Double Layers in Multicomponent Bounded Plasma

Effect of ion drift on shock waves in an un-magnetized multi-ion plasma

Modulation Instability of Ion-Acoustic Waves in Plasma with Nonthermal Electrons

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