Ion acoustic solitary waves and double layers in dense electron-positron-ion magnetoplasma

Chatterjee, Prasanta; Saha, Taraknath; Muniandy, S. V.; Wong, C. S.; Roychoudhury, Rajkumar

doi:10.1063/1.3291059

Cited by 20 publications

(15 citation statements)

References 33 publications

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“…The effect of external magnetic field on electrostatic waves has been studied by a number of authors Mamun 1998;Mamun et al 1998;Zhang and Xue 2005a, b;Chatterjee et al 2010;Sultana et al 2010;Alinejad and Mamun 2011;Shahmansouri and Alinejad 2012;Tribeche and Bacha 2012;Shahmansouri 2013a, b;Shahmansouri and Alinejad 2013b, c, d). Mamun et al (1998) studied the obliquely propagating DA solitary structures in a hot magnetized dusty plasma.…”

Section: Introductionmentioning

confidence: 99%

Dust-acoustic shock waves in a magnetized non-thermal dusty plasma

Shahmansouri¹,

Mamun

2014

J. Plasma Phys.

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A theoretical investigation is carried out to study the basic properties of dust-acoustic (DA) shock waves propagating in a magnetized non-thermal dusty plasma (containing cold viscous dust fluid, non-thermal ions, and non-thermal electrons). The reductive perturbation method is used to derive the Korteweg-de Vries-Burgers equation. It is found that the basic properties of DA shock waves are significantly modified by the combined effects of dust fluid viscosity, external magnetic field, and obliqueness (angle between external magnetic field and DA wave propagation direction). It is shown that the dust fluid viscosity acts as a source of dissipation, and is responsible for the formation of DA shock structures in the dusty plasma system under consideration. The implications of our results in some space and laboratory plasma situations are briefly discussed.

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Section: Introductionmentioning

confidence: 99%

Dust-acoustic shock waves in a magnetized non-thermal dusty plasma

Shahmansouri¹,

Mamun

2014

J. Plasma Phys.

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“…The solitary structures and double layers have been reported by a number of observations in space, in laboratory, in numerical simulation and in theoretical studies. [29][30][31][32][33][34][35][36][37][38][39][40][41][42][43] The finite amplitude double layers have been investigated in a four component plasma with electrons, and two temperature Maxwellian ions and negatively charged dust a) Email: shal.phy29@gmail.com b) Author to whom correspondence should be addressed. Electronic mail: nssaini@yahoo.com grains.…”

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confidence: 99%

Ion acoustic solitary waves and double layers in a plasma with two temperature electrons featuring Tsallis distribution

Shalini

Saini

2014

Physics of Plasmas

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The propagation properties of large amplitude ion acoustic solitary waves (IASWs) are studied in a plasma containing cold fluid ions and multi-temperature electrons (cool and hot electrons) with nonextensive distribution. Employing Sagdeev pseudopotential method, an energy balance equation has been derived and from the expression for Sagdeev potential function, ion acoustic solitary waves and double layers are investigated numerically. The Mach number (lower and upper limits) for the existence of solitary structures is determined. Positive as well as negative polarity solitary structures are observed. Further, conditions for the existence of ion acoustic double layers (IADLs) are also determined numerically in the form of the critical values of qc, f and the Mach number (M). It is observed that the nonextensivity of electrons (via qc,h), concentration of electrons (via f) and temperature ratio of cold to hot electrons (via β) significantly influence the characteristics of ion acoustic solitary waves as well as double layers.

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“…?, for each plasma species. Integrating (7) and (8) with respect to x and using (15), according to (13) we can calculate the pseudopotential J i for ions,as …”

Section: Derivation Of Pseudopotential For Relativistic Electron-posimentioning

confidence: 99%

Propagation of ion-acoustic solitary waves in a relativistic electron-positron-ion plasma

2011

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The propagation of large amplitude ion-acoustic solitary waves (IASWs) in a fully relativistic plasma consisting of cold ions and ultra-relativistic hot electrons and positrons is investigated using the Sagdeev pseudopotential method in a relativistic hydrodynamics model. The effects of streaming speed of the plasma fluid, thermal energy, positron density, and positron temperature on large amplitude IASWs are studied by analysis of the pseudopotential structure. It is found that in regions in which the streaming speed of the plasma fluid is larger than that of the solitary wave, by increasing the streaming speed of the plasma fluid, the depth and width of the potential well increase, resulting in narrower solitons with larger amplitude. This behavior is opposite to the case where the streaming speed of the plasma fluid is less than that of the solitary wave. On the other hand, an increase in the thermal energy results in wider solitons with smaller amplitude, because the depth and width of the potential well decrease in that case. Additionally, the maximum soliton amplitude increases and the width becomes narrower as a result of an increase in positron density. It is shown that varying the positron temperature does not have a considerable effect on the width and amplitude of IASWs. The existence of stationary soliton-like arbitary amplitude waves is also predicted in fully relativistic electron-positron-ion (EPI) plasmas. The effects of streaming speed of the plasma fluid, thermal energy, positron density, and positron temperature on these kinds of solitons are the same for large amplitude IASWs.PACS Nos: 52.30.Ex, 52.27.Ny, 52.35.Fp, 52.35.Sb Résumé : La propagation d'ondes solitaires acoustiques ioniques (IASWs) dans un plasma relativiste, constitué d'ions froids et d'électrons et de positrons ultrarelativistes, est étudiée ici en utilisant la méthode du pseudo potentiel de Sagdeev dans un modèle hydrodynamique relativiste. Nous étudions les effets de la vitesse de flot du fluide plasmatique, de l'énergie thermique, de la densité et de la température des positrons sur les IASWs de grande amplitude, en analysant la structure du pseudo potentiel. Nous trouvons que dans les régions où la vitesse de flot du fluide plasmatique est plus grande que celle de l'onde solitaire, en augmentant la vitesse du flot, la profondeur et la largeur du puits de potentiel augmentent, résultant en des solitons plus étroits et de plus grande amplitude. Ce comportement est à l'opposée de ce qui se produit lorsque la vitesse de flot du plasma est plus faible que celle de l'onde solitaire. Par contre, une augmentation de l'énergie thermique résulte en des solitons plus larges et de plus petite amplitude, parce que la largeur et la profondeur du puits diminuent. De plus, l'amplitude maximale du soliton augmente et sa largeur diminue si on augmente la densité de positrons. Nous montrons que la variation de température des positrons n'a que peu d'effet sur la largeur et l'amplitude des IASWs. On prédit aussi la présence d'ondes solitaire...

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Ion acoustic solitary waves and double layers in dense electron-positron-ion magnetoplasma

Cited by 20 publications

References 33 publications

Dust-acoustic shock waves in a magnetized non-thermal dusty plasma

Dust-acoustic shock waves in a magnetized non-thermal dusty plasma

Ion acoustic solitary waves and double layers in a plasma with two temperature electrons featuring Tsallis distribution

Propagation of ion-acoustic solitary waves in a relativistic electron-positron-ion plasma

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