Ion-acoustic solitons in plasma: an application to Saturn’s magnetosphere

Annou, K.

doi:10.1007/s10509-015-2391-7

Cited by 13 publications

(4 citation statements)

References 23 publications

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“…[21][22][23][24][25] Based on the plasma kinetic theory, the modified Boltzmann relation for the Kappa distributed particles are derived and the effect of superthermality of the electrons on the characteristics of the ion-acoustic solitons are investigated. 26) Using this modified Boltzmann relations, the arbitrary amplitude ion-acoustic solitary waves in the Lorentzian plasmas, 27) the electron-acoustic solitary structures in two-electron-temperature plasma, 28) the ion-acoustic solitons in Saturn's magnetosphere 29) were investigated.…”

Section: Introductionmentioning

confidence: 99%

Nonlinear dust acoustic waves with polarization force effects in Kappa distribution plasma

Chen

Zhou

Luo

et al. 2016

Jpn. J. Appl. Phys.

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The propagation characteristics of dust acoustic solitary waves (DASWs) in dusty plasmas with the effects of polarization force and superthermal ions are studied. First, the polarization force induced by superthermal ions is obtained. It is shown that the superthermality of background ions affect the Debye screening of dust grains as well as the polarization force significantly. Then for small amplitude solitary waves, the KdV equation is obtained by applying the reductive perturbation technique. And for the arbitrary amplitude solitary waves, the Sagdeev potential method is employed and the Sagdeev potential is analyzed. In both case, the effects of the polarization force associated the ions’ superthermality on the characteristic of the DASWs are analyzed.

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Section: Introductionmentioning

confidence: 99%

Nonlinear dust acoustic waves with polarization force effects in Kappa distribution plasma

Chen

Zhou

Luo

et al. 2016

Jpn. J. Appl. Phys.

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“…It is observed that in the presence of hot and cold electrons, the potential profiles get modified significantly and result in the formation of compressive and rarefactive distributions (see Figures 1a, 2 and 7) and are in good agreement with the earlier theoretical studies by Siani et al [ 19 ] and K. Annou. [ 54 ] The rotational frequency is also found to affect the potential profiles significantly as can be seen in Figures 6 and 9. Further, we have used generalized Lorentzian distribution for electrons by taking values of kappa in the range 2–6 that are representative of space plasma environments.…”

Section: Discussionmentioning

confidence: 85%

Nonlinear ion acoustic waves in dissipative and dispersive magneto‐rotating relativistic plasmas with two temperature superthermal electrons

Abbasi

Masood

Khan

et al. 2020

Contributions to Plasma Physics

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A study has been presented for the nonlinear features of ion-acoustic (IA) shock waves in a magnetorotating plasma consisting of warm viscous streaming ions along with kappa-distributed electrons having two different temperatures. In this regard, we have employed the reductive perturbation technique to derive the Zakharov-Kuznetsov-Burgers (ZKB) equation that governs the dynamics of IA shock waves. The solution obtained by the hyperbolic tangent method has been shown to depend on various plasma parameters such as spectral index (c), density fraction (f), effective rotation frequency (Ω c), ion kinematic viscosity (o), and temperature ratio (). In the limiting case when dissipative coefficient D → 0, we have also examined the solitary potential distributions, which are the solutions of Zakharov Kuznetsov (ZK) equation. It is found that both rarefactive and compressive structures exist for the system under consideration. The transition in the nature of such profiles is due to the enhancement in the density of cold electrons. The importance of present theoretical investigations has been carried out with regard to Saturn's magnetosphere, where two temperature superthermal electron populations have been observed by various satellite missions. K E Y W O R D S ion acoustic waves, kappa distribution, nonthermal plasma, shocks/solitons, two electron thermal population 1 INTRODUCTION Ion acoustic waves (IAW) are one of the fundamental low-frequency modes in a plasma and are associated with plasma compression during their propagation. [1,2] Various plasmas allow propagation of several types of nonlinear waves, e.g. solitons and shocks. [3,4] The former can trap plasma particles and cause a redistribution of energy and momentum. These structures arise due to the interplay between wave dispersion and nonlinearity as described by the Korteweg de Vries (KdV) equation. The system becomes more interesting in the presence of dissipation and, for weakly nonlinear 1-D systems, is depicted by Korteweg-de Vries-Burgers (KdVB) Equation. [5,6] Such dissipation is mainly caused by interparticle collisions, ion kinematic viscosity, and/or wave-particle interaction. The dissipation term is often recognized as the Burgers term and supports formation of shock waves. [7-12]

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“…The first experimental measurements of standing IA waves were reported by Revans [2] in 1933, whereas the observation of propagating IA waves took another 33 years, and it was reported by Wong et al [3] in the Q machine in 1962. The IA wave has also been observed in astrophysical plasmas, such as solar wind [4], Saturn ring [5], Comets, Neutrinos [6], Magnetosphere as well as in fusion plasmas.…”

Section: Imentioning

confidence: 95%

Evidence for neutrals carrying ion-acoustic wave momentum in a partially ionized plasma

et al. 2020

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An experimental study of Ion Acoustic (IA) wave propagation is performed to investigate the effect of neutral density for argon plasma in an unmagnetized linear plasma device. The neutral density is varied by changing the neutral pressure, which in turn allows the change in ion-neutral, and electron-neutral collision mean free path. The collisions of plasma species with neutrals are found to modify the IA wave characteristics such as the wave amplitude, velocity, and propagation length. Unlike the earlier reported work where neutrals tend to heavily damp IA wave in the frequency regime (where is ion-acoustic mode frequency and is ion-neutral collision frequency), the experimental study of IA wave presented in this paper suggests that the collisions support the wave to propagate for longer distances as the neutral pressure increases. A simple analytical model is shown to qualitatively support the experimental findings.

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Ion-acoustic solitons in plasma: an application to Saturn’s magnetosphere

Cited by 13 publications

References 23 publications

Nonlinear dust acoustic waves with polarization force effects in Kappa distribution plasma

Nonlinear dust acoustic waves with polarization force effects in Kappa distribution plasma

Nonlinear ion acoustic waves in dissipative and dispersive magneto‐rotating relativistic plasmas with two temperature superthermal electrons

Evidence for neutrals carrying ion-acoustic wave momentum in a partially ionized plasma

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