Two stream ion acoustic wave instability in warm dense plasmas

  • M. MohammadnejadEmail author
  • M. Akbari-Moghanjoughi
Original Article


In this study we investigate the two-ion stream instability of plasma with a generalized Fermi-Dirac equation of state (EoS) for electron fluid. We use a hydrodynamic set of evolution equations for electron-ion plasma in order to obtain the linearized set of equations from which the dispersion relation of the plasma is obtained in the presence of ion acoustic wave instability. It is remarked that changes in the electron plasma fluid parameters such as the chemical potential and electron fluid temperature have fundamental effects on the growth rate of ion acoustic waves instability. It is however found that the plasma degeneracy has rather more significant effect on the two stream instability phenomenon. The generalized equation of state of electrons used in this research is valid for a wide density-temperature regimes of plasmas relevant to both laboratory as well as astrophysical environments including high-energy density fusion plasmas and fully degenerate compact stellar plasmas. We believe that using such a wide scope of plasma EoS provides a broader view of underlying physical mechanisms in plasma dynamics and instabilities and better understanding of astrophysical harsh plasma environments.


Ion stream instability Dense plasma 



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© Springer Nature B.V. 2019

Authors and Affiliations

  1. 1.Faculty of Sciences, Department of PhysicsAzarbaijan Shahid Madani UniversityTabrizIran

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