Adiabatic evolution of phase space electron–hole in plasmas with super-thermal electrons

Abbasi, H.; Pajouh, H. Hakimi

doi:10.1088/0741-3335/50/9/095007

Cited by 17 publications

(15 citation statements)

References 38 publications

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“…They have shown the importance of the presence of the two effects on the existence and propagation of ion acoustic waves. Abbasi and Hakimi (2008) and Ahmadihojatabad et al (2010) made similar studies but with supra-thermal electrons modeled by Kappa distribution (generalized Lorentzian) (Hau, 2007) and trapped electrons modeled by the distribution of Schamel. In the same way, throughout this work, we studied these two effects on the self-similar expansion of plasma created by lasers, enough powerful to excite nonlinear effects such as plasma waves. The energetic electrons are supposed to follow the Cairns function distribution whereas the electrons trapped by the potential wells created by the plasma waves are modelled by the function of distribution of Gurevich.…”

Section: Introductionmentioning

confidence: 67%

Combined effects of electronic trapping and non-thermal electrons on the expansion of laser produced plasma into vacuum

2014

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In this work, the effect of electron trapping on the self-similar expansion of electron-ion laser plasma into vacuum, combined with the effect of non-thermal (energetic) electrons is studied. For this, a mono-dimensional, non-relativistic model where the ions are cold and governed by fluid equations is used. In the approximation of quasi-neutrality of charge, the obtained self-similar solution shows that for ion (plasma) behavior, the presence of an important number of non-energetic trapped electrons in the plasma potential wells has the effect of slowing down the expansion, whereas the phenomenon of presence of energetic electrons makes the influence of trapping effect on the self-similar expansion very weak even in the case of a very small number of energetic electrons. This study is of interest in the context of the investigation of mono-energetic ion beams from intense laser interactions with plasmas.

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Section: Introductionmentioning

confidence: 67%

Combined effects of electronic trapping and non-thermal electrons on the expansion of laser produced plasma into vacuum

2014

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“…The decay process of the initial perturbation takes place quite slowly. Therefore, in order to prevent the violation of the conservation laws due to the large number of temporal iterations, a special numerical scheme has to be designed to obtain the desired accuracy [14].…”

Section: Resultsmentioning

confidence: 99%

Influence of trapped electrons on the nonstationary stage of dust-ion-acoustic solitons formation from a localized perturbation

Pajouh

Abbasi

2008

Plasma Phys. Control. Fusion

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The influence of electron trapping on the evolution of a localized perturbation and its disintegration into dust-ion-acoustic solitons is studied. This paper is a theoretical attempt to extend the experimental soliton excitation of (Nakamura Y et al 2001 Phys. Plasmas 8 3921) to the case that the effect of electron trapping is considerable. We consider the situation under which the dissipative effects associated with the dust charge fluctuations and collisional processes are negligible. For this purpose, we assume an unbounded plasma composed of cold positively charged ions, cold negatively charged dusts and hot electrons. Electron trapping is included in the model as a result of nonlinear resonant interaction of the localized perturbation with electrons. A Gaussian initial perturbation is used to model the localized perturbation. The dependence of the evolution rate and the resulting solitons amplitudes and velocities on the trapping parameter, the charge state of ions and the charge density of dusts are investigated.

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“…( 1) and ( 2) of [17], where the electrons distribution function actually is not a function of the energy, or Eqs. ( 1) and ( 2) of [18], where it is non-propagating (v 0 = 0).…”

Section: One-dimensional Superthermal Distributionmentioning

confidence: 99%

Electron Holes in a $κ$ Distribution Background with Singularities

Haas

2021

Preprint

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The pseudo-potential method is applied to derive diverse propagating electron hole structures, in a nonthermal or κ particle distribution function background. The associated distribution function Ansatz reproduces the Schamel distribution of [7] in the Maxwellian (κ → ∞) limit, providing a significant generalization of it for plasmas where superthermal electrons are ubiquitous, such as space plasmas. The pseudo-potential and the nonlinear dispersion relation are evaluated. The role of the spectral index κ on the nonlinear dispersion relation is investigated, in what concerns the wave amplitude for instance. The energy-like first integral from Poisson's equation is applied to analyze the properties of diverse classes of solutions: with the absence of trapped electrons, with a non-analytic distribution of trapped electrons, or with a surplus of trapped electrons. Special attention is therefore paid to the non-orthodox case where the electrons distribution function exhibits strong singularities, being discontinuous or non-analytic.

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Adiabatic evolution of phase space electron–hole in plasmas with super-thermal electrons

Cited by 17 publications

References 38 publications

Combined effects of electronic trapping and non-thermal electrons on the expansion of laser produced plasma into vacuum

Combined effects of electronic trapping and non-thermal electrons on the expansion of laser produced plasma into vacuum

Influence of trapped electrons on the nonstationary stage of dust-ion-acoustic solitons formation from a localized perturbation

Electron Holes in a $κ$ Distribution Background with Singularities

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