On the fully nonlinear acoustic waves in a plasma with positrons beam impact and superthermal electrons

Shan, S. Ali; El-Tantawy, S. A.; Moslem, W. M.

doi:10.1063/1.4817280

Cited by 29 publications

(8 citation statements)

References 58 publications

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“…[5,12,13] Therefore, it is worthwhile to study the nonlinear wave propagation in electronpositron-ion plasmas for understanding the dynamical behaviour of astrophysical and laboratory plasmas. [14][15][16][17][18][19][20] In the latter, the authors have shown that the nonlinear waves in the plasmas having positrons behave differently. Misra et al [5] reported that the nonlinear mode of propagation and interaction in an electron-positron plasma exhibits a remarkable feature which is quite distinctive from the linear mode.…”

Section: Introductionmentioning

confidence: 99%

“…Interestingly, in a plasma system when a source of beam is inserted, it makes the system prone to a well-known streaming instability. Recently, Shan et al [20] showed that due to the increased speed of positron beam and super-thermal electrons, the region of existence, amplitude, and width of solitons can be modified. Again, very re-cently, Shan et al [21] found that with the variation in positron beam speed and positron population, and nonlinearities of the plasma system can be predominantly changed.…”

Section: Introductionmentioning

confidence: 99%

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Nonlinear ion-acoustic solitary waves in an electron-positron-ion plasma with relativistic positron beam

2018

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The propagation characteristics of nonlinear ion-acoustic (IA) solitary waves (SWs) are studied in thermal electronpositron-ion plasma considering the effect of relativistic positron beam. Starting from a set of fluid equations and using the reductive perturbation technique, we derive a Korteweg-de Vries (KdV) equation which governs the evolution of weakly nonlinear IA SWs in relativistic beam driven plasmas. The properties of the IA soliton are studied, and it is shown that the presence of relativistic positron beam significantly modifies the characteristics of IA solitons.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Nonlinear ion-acoustic solitary waves in an electron-positron-ion plasma with relativistic positron beam

2018

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“…[ 6–8 ] The e‐p‐i plasmas have remained one of the most studied areas in the plasma physics community for the last couple of decades. Several studies have been devoted to non‐linear electrostatic waves in e‐p‐i plasmas, [ 9–14 ] and it has been well established that wave propagation is considerably modified by the presence of positrons in e‐i plasmas. [ 15–17 ]…”

Section: Introductionmentioning

confidence: 99%

Ion‐acoustic solitary waves in e‐p‐i plasmas with (r, q)‐distributed electrons and kappa‐distributed positrons

Kouser

Qureshi

Shah

et al. 2020

Contributions to Plasma Physics

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In this paper, we have studied the propagation of non-linear ion-acoustic waves in a plasma comprising of (r, q)-distributed electrons and kappa-distributed positrons. We have investigated the effect of complete electron distribution profile on the propagation of small, as well as arbitrary, amplitude solitons (via pseudopotential technique) by using generalized (r, q) distribution, which exhibits a spiky and flat top nature at low energies and a super-thermal tail at high energies. Interestingly, for negative values of r, solitons are formed with both polarities, positive (compressive) and negative (rarefactive), separately within a small amplitude limit and exist simultaneously in an arbitrary amplitude limit. We also found that the propagation of solitons has been affected by the change in parameters r, q, positron concentration, and electron to positron temperature ratio. The results presented in this study add to the fundamental understanding of the complete profile of the electron distribution function, highand low-energy parts, and in the formation of compressive and rarefactive small and finite amplitude solitons in both space and astrophysical plasmas.

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“…Dense electron-positron pairs are demonstrated to be in the early universe, in solar atmosphere, and in inertial confinement fusion schemes using ultra-intense lasers. [1][2][3] One expects to uncover some mysteries of the universe by studying dense pair plasma state created via laser-plasma interactions in the laboratory. [4] For example, ultra-bright gamma ray burst is generally accepted as arising from synchrotron emission of relativistic shocks in pair plasmas.…”

Section: Introductionmentioning

confidence: 99%

Dense pair plasma generation by two laser pulses colliding in a cylinder channel

Liu

et al. 2017

Chinese Phys. B

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An all-optical scheme for high-density pair plasmas generation is proposed by two laser pulses colliding in a cylinder channel. Two dimensional particle-in-cell simulations show that, when the first laser pulse propagates in the cylinder, electrons are extracted out of the cylinder inner wall and accelerated to high energies. These energetic electrons later run into the second counter-propagating laser pulse, radiating a large amount of high-energy gamma photons via the Compton back-scattering process. The emitted gamma photons then collide with the second laser pulse to initiate the Breit-Wheeler process for pairs production. Due to the strong self-generated fields in the cylinder, positrons are confined in the channel to form dense pair plasmas. Totally, the maximum density of pair plasmas can be 4.60 × 10 27 m −3 , for lasers with an intensity of 4 × 10 22 W•cm −2 . Both the positron yield and density are tunable by changing the cylinder radius and the laser parameters. The generated dense pair plasmas can further facilitate investigations related to astrophysics and particle physics.

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On the fully nonlinear acoustic waves in a plasma with positrons beam impact and superthermal electrons

Cited by 29 publications

References 58 publications

Nonlinear ion-acoustic solitary waves in an electron-positron-ion plasma with relativistic positron beam

Nonlinear ion-acoustic solitary waves in an electron-positron-ion plasma with relativistic positron beam

Ion‐acoustic solitary waves in e‐p‐i plasmas with (r, q)‐distributed electrons and kappa‐distributed positrons

Dense pair plasma generation by two laser pulses colliding in a cylinder channel

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