Ion-acoustic solitary waves in a partially degenerate plasma
arXiv:2201.08972 · doi:10.1109/TPS.2022.3216058
Abstract
The propagation of arbitrary amplitude ion-acoustic (IA) solitary waves (SWs) is studied in unmagnetized, collisionless, homogeneous electron-positron-ion (e-p-i) plasmas with finite temperature degeneracy of both electrons and positrons. Starting from a set of fluid equations for classical ions and Fermi-Dirac distribution for degenerate electrons and positrons, a linear dispersion relation for IA waves is derived. It is seen that the wave dispersion is significantly modified due to the presence of positron species and the effects of finite temperature degeneracy of electrons and positrons. In the nonlinear regime, the Sagdeev's pseudopotential approach is employed to study the existence domain and the evolution of nonlinear IA-SWs in terms of the parameters that are associated with the finite temperature degeneracy, the background number densities, and the thermal energies of electrons and positrons. It is found that in contrast to classical electron-ion plasmas both the subsonic and supersonic IA-SWs can exist in a partially degenerate e-p-i plasma.
arXiv comment9 pages, 5 figures; Revised version to appear in IEEE Transactions on Plasma Science
References in corpus (12)
- Colloquium: Nonlinear collective interactions in quantum plasmas with degenerate electron fluids
- Linear and nonlinear ion-acoustic waves in non-relativistic quantum plasmas with arbitrary degeneracy
- Ion-acoustic solitary waves and shocks in a collisional dusty negative ion plasma
- Nonlinear separate spin evolution in degenerate electron-positron-ion plasmas
- Scaling of Magneto-Quantum-Radiative Hydrodynamic Equations: From Laser-produced Plasmas to Astrophysics
- Nonlinear Landau damping and modulation of electrostatic waves in a nonextensive electron-positron-pair plasma
- Solid state plasmas
- Wave-particle interactions in quantum plasmas
- Propagation of arbitrary amplitude nonlinear quantum ion-acoustic waves in electron-ion plasmas: Dimensionality effects
- Large amplitude solitary waves in ion-beam plasmas with charged dust impurities
- Large amplitude electromagnetic solitons in a fully relativistic magnetized electron-positron-pair plasma
- The methods of thermal field theory for degenerate quantum plasmas in astrophysical compact objects