Polarization force-induced changes in the dust sheath formation

Mayout, Saliha; Bentabet, Karima; Tribeche, Mouloud

doi:10.1063/1.4931173

Cited by 18 publications

(3 citation statements)

References 29 publications

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“…It can set an upper limitation of the dust grain size beyond which the dusty plasma may not support any nonlinear excitations. The seath structure in dusty plasma gets also modified due to the polarization force which was investigated by Mayout et al [7]. The critical Mach number was determined with the help of modified Bohm criterion [8].…”

Section: Introductionmentioning

confidence: 99%

On the effect of incoherence in a polarized dusty plasma and Wigner stability

Chaudhuri¹,

Chowdhury²,

Chowdhury³

2022

Phys. Scr.

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We theoretically analysed the effect of incoherence present in the initial density in a homogeneous plasma containing nonthermal ions and Maxwellian electrons under the influence of polarization force. The Krylov-Bogoliubov-Mitropolsky (KBM) method is used to derive the Nonlinear Schrödinger equation. In the next stage the incoherence effect is analysed by studying the equation of motion of the correlation function 〈n(x, t)n *(x, t)〉 with the help of Wigner quantization and Moyal braket. The modulational stability of the new equation is exhaustively studied with respect to the plasma parameters variation and the effect of polarization force. In the next section, we considered a q-nonextensive distribution of electrons and viewed a more general form of polarization force by following Bentabet et al. The same analysis is again repeated and the modulation stability is analysed.

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Section: Introductionmentioning

confidence: 99%

On the effect of incoherence in a polarized dusty plasma and Wigner stability

Chaudhuri¹,

Chowdhury²,

Chowdhury³

2022

Phys. Scr.

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“…Moreover, Bandyopadhyay et al 6 showed that an increase of the polarization force, for a given value of Mach number, leads to an increase (reduction) in the amplitude (width) of the solitary DA waves. More recently, Mayout et al 7 studied the modifications arising in the dusty plasma sheath formation due to the presence of polarization forces acting on the dust grains. They showed that the critical Mach number, beyond which the dusty plasma electrostatic sheath sets in, decreases when the polarization effects increase.…”

Section: Introductionmentioning

confidence: 99%

Small amplitude dust‐acoustic soliton energy in dusty plasmas with suprathermal polarization force

Mayout

Benzekka

Amour

2021

Contributions to Plasma Physics

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The effect of suprathermal polarization force on both linear and weakly nonlinear dust-acoustic solitary structures in a three-component dusty plasma is investigated. For this purpose, a new expression of the polarization force acting on dust particles that include the electronic suprathermal effect is derived.The results are applied to two different experimental dusty plasmas. We have found that the polarization force acting on the dust grains decreases as the electron suprathermality becomes more significant. In addition, we have shown that, for a given value of the spectral index κ, the polarization force magnitude fluctuates from one plasma to another. The changes arising in the propagation of small-amplitude dust-acoustic (DA) solitons due to the presence of this suprathermal polarization force are also analysed. Interestingly, an increase in the magnitude of the polarization force leads to an increase in the amplitude and width of DA soliton and provides more energy to the motion of this soliton.

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“…When the values of the reduced charge of dust grain are between 2 and 4 within the OML theory 32) in collisionless and unmagnetized plasma, the polarization force and the charge gradient force are of comparable magnitude are discussed by Khrapak et al 33,34) The polarization force represents the deformation of the Debye sphere around dust particles caused by non-uniform plasma. The dust grain will be acted by the polarization force when dust grains immersed in non-uniform plasma and the charge of the dust grain is constant, 24,[35][36][37][38][39][40][41][42][43][44]…”

Section: Introductionmentioning

confidence: 99%

Effect of polarization and charge gradient forces on the dust acoustic solitary waves

He¹,

Chen²,

Liu³

2019

Jpn. J. Appl. Phys.

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The propagation of dust acoustic solitary waves (DASWs) in collisionless and unmagnetized plasma is investigated taking into account the effect of polarization and charge gradient forces. A Korteweg–de Vries equation and its stationary localized solution are obtained. Numerically, it is found that polarization force and charge gradient force have opposite effects on the amplitude and width of DASWs, i.e. polarization effect leads to an increase in the amplitude and a decrease in the width of DASWs, In contrast, the charge gradient effect enhances the amplitude of DASWs and weakens its width.

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Polarization force-induced changes in the dust sheath formation

Cited by 18 publications

References 29 publications

On the effect of incoherence in a polarized dusty plasma and Wigner stability

On the effect of incoherence in a polarized dusty plasma and Wigner stability

Small amplitude dust‐acoustic soliton energy in dusty plasmas with suprathermal polarization force

Effect of polarization and charge gradient forces on the dust acoustic solitary waves

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