Advanced search
1 file | 846.24 KB

On a semiclassical model for ion-acoustic solitons in ultrarelativistic pair plasmas and its classical counterpart

Author
Organization
Abstract
Large ion-acoustic solitary waves are investigated in a multispecies plasma model consisting of warm positive ions in the presence of ultrarelativistic electrons and positrons, in a Sagdeev pseudopotential formalism. A parametric investigation determines existence regions in terms of fractional densities, temperature ratios, and soliton speeds. Various examples of pseudopotential functional forms, as well as those of the resulting soliton and electric field profiles, can then be generated numerically, and some typical illustrations have been included. Rather than adiabatic pressure-density relations for the hot species, the classical nonrelativistic counterpart involves Boltzmann distributions, which differ qualitatively from the literature. Surprisingly, the soliton and electric field profiles show scant differences at the same compositional parameters between the two extremes even though the physical description of the hot species is radically different. A brief comparison has also been included between the fully nonlinear Sagdeev pseudopotential descriptions and their respective associated weak-amplitude limits (treated via a reductive perturbation technique) in which nonlinearities have been truncated to low powers of the electrostatic potential. Again, the soliton profiles are not radically different at comparable amplitudes, leaving the underlying physical reasons for such a similarity an open problem.
Keywords
Plasma Physics

Downloads

  • (...).pdf
    • full text
    • |
    • UGent only
    • |
    • PDF
    • |
    • 846.24 KB

Citation

Please use this url to cite or link to this publication:

Chicago
Verheest, Frank, and Ioannis Kourakis. 2019. “On a Semiclassical Model for Ion-acoustic Solitons in Ultrarelativistic Pair Plasmas and Its Classical Counterpart.” Physics of Plasmas 26.
APA
Verheest, F., & Kourakis, I. (2019). On a semiclassical model for ion-acoustic solitons in ultrarelativistic pair plasmas and its classical counterpart. Physics of Plasmas, 26.
Vancouver
1.
Verheest F, Kourakis I. On a semiclassical model for ion-acoustic solitons in ultrarelativistic pair plasmas and its classical counterpart. Physics of Plasmas. 2019;26.
MLA
Verheest, Frank, and Ioannis Kourakis. “On a Semiclassical Model for Ion-acoustic Solitons in Ultrarelativistic Pair Plasmas and Its Classical Counterpart.” Physics of Plasmas 26 (2019): n. pag. Print.
@article{8623356,
  abstract     = {Large ion-acoustic solitary waves are investigated in a multispecies plasma model consisting of warm positive ions in the presence of ultrarelativistic electrons and positrons, in a Sagdeev pseudopotential formalism. A parametric investigation determines existence regions in terms of fractional densities, temperature ratios, and soliton speeds. Various examples of pseudopotential functional forms, as well as those of the resulting soliton and electric field profiles, can then be generated numerically, and some typical illustrations have been included. Rather than adiabatic pressure-density relations for the hot species, the classical nonrelativistic counterpart involves Boltzmann distributions, which differ qualitatively from the literature. Surprisingly, the soliton and electric field profiles show scant differences at the same compositional parameters between the two extremes even though the physical description of the hot species is radically different. A brief comparison has also been included between the fully nonlinear Sagdeev pseudopotential descriptions and their respective associated weak-amplitude limits (treated via a reductive perturbation technique) in which nonlinearities have been truncated to low powers of the electrostatic potential. Again, the soliton profiles are not radically different at comparable amplitudes, leaving the underlying physical reasons for such a similarity an open problem.},
  articleno    = {062301},
  author       = {Verheest, Frank and Kourakis, Ioannis},
  issn         = {1070-664X},
  journal      = {Physics of Plasmas},
  keywords     = {Plasma Physics},
  language     = {eng},
  title        = {On a semiclassical model for ion-acoustic solitons in ultrarelativistic pair plasmas and its classical counterpart},
  url          = {http://dx.doi.org/10.1063/1.5100244},
  volume       = {26},
  year         = {2019},
}

Altmetric
View in Altmetric
Web of Science
Times cited: