Plasmon turbulence spectra with the filamentation patterns in a laser plasma

Abstract

The instantaneous spectra of the transverse, Langmuir, and ion-sound plasmons near the critical surface in a laser-plasma are numerically obtained from the complete Zakharov equations under the condition of the nonstatic limit. They are used to discuss the filamentation process in the strong Langmuir turbulence. From the turbulence spectra, the energy flux flow from small k space to large k space can be identified. The higher incident laser intensity associated with a quicker filamentation process can also be identified.

Magnetic field induced by strong transverse plasmons in ultra-relativistic electron-positron plasmas

“…The Langmuir waves undergo a mode conversion process and generate electromagnetic waves at the plasma frequency. There is a continuous transfer from Langmuir waves to transverse plasmons and back, and their energy densities are approximately the same, average over time, W l ≈ W T (Kaplan & Tsytovich 1973;Liu et al 2008). The prompt γ-rays in the GRBs are assumed to be produced by internal shock that may be dominated by the ultrarelativistic electron-positron pairs (Medvedev et al 2005).…”