Stimulated scattering instability in a relativistic plasma
Abstract
We study the stimulated scattering instabilities of an intense linearly polarized electromagnetic wave (EMW) in a relativistic plasma with degenerate electrons. Starting from a relativistic hydrodynamic model and the Maxwell's equations, we derive coupled nonlinear equations for low-frequency electron and ion plasma oscillations that are driven by the EMW's ponderomotive force. The nonlinear dispersion relations are then obtained from the coupled nonlinear equations which reveal stimulated Raman scattering (SRS), stimulated Brillouin scattering (SBS), and modulational instabilities (MIs) of EMWs. It is shown that the thermal pressure of ions and the relativistic degenerate pressure of electrons significantly modify the characteristics of SRS, SBS, and MIs.
Cite
@article{arxiv.1802.09260,
title = {Stimulated scattering instability in a relativistic plasma},
author = {A. P. Misra and D. Chatterjee},
journal= {arXiv preprint arXiv:1802.09260},
year = {2018}
}
Comments
7 pages, 3 figures. In the revised version, the basic equations are corrected, and the results and discussion are significantly improved. To appear in Phys. Plasmas (2018)