Excitation of large amplitude electron plasma waves by laser

Nonlinear excitation of acoustic modes by large-amplitude Alfvén waves in a laboratory plasma.

The nonlinear three-wave interaction process at the heart of the parametric decay process is studied by launching counterpropagating Alfvén waves from antennas placed at either end of the Large Plasma Device. A resonance in the beat wave response produced by the two launched Alfvén waves is observed and is identified as a damped ion acoustic mode based on the measured dispersion relation. Other...

Excitation of accelerating plasma waves by counter-propagating laser beams

Generation of accelerating plasma waves using two counter-propagating laser beams is considered. Colliding-beam accelerator requires two laser pulses: the long pump and the short timing beam. We emphasize the similarities and differences between the conventional laser wakefield accelerator and the colliding-beam accelerator (CBA). The highly-nonlinear nature of the wake excitation is explained ...

Strongly enhanced laser absorption and electron acceleration via resonant excitation of surface plasma waves

Thermal effects on the propagation of large-amplitude electromagnetic waves in magnetized relativistic electron-positron plasma.

The propagation of circularly polarized electromagnetic waves along a constant background magnetic field in an electron-positron plasma is calculated by means of both a fluid and a kinetic theory treatment. In the fluid theory, relativistic effects are included in the particle motion, the wave field, and in the thermal motion by means of a function f, which depends only on the plasma temperatur...

Coupling between electron plasma waves in laser–plasma interactions*

ALagrangian fluid model ~cold plasma, fixed ions! is developed for analyzing the coupling between electron plasma waves. This model shows that a small wave number electron plasma wave (v2 ,k2) will strongly affect a large wave number electron plasma wave (v1 ,k1), transferring its energy into daughter waves or sidebands at (v11nv2 ,k11nk2) in the lab frame. The accuracy of the model is checked ...