Strongly Enhanced Stimulated Brillouin Backscattering in an Electron-Positron Plasma

Enhanced spontaneous backscattering in Brillouin dynamic gratings.

Spontaneous Brillouin backscattering, which accompanies the operation of Brillouin dynamic gratings (BDGs) setups, is investigated both theoretically and experimentally. It is shown that this noisy emission, which cannot be separated from the signal of interest, contains not only the probe spontaneous Brillouin backscattering but also a significant contribution from the spontaneous/stimulated a...

Stimulated Brillouin Backscattering For Laser-Plasma Interaction In The Strong Coupling Regime

Centre Lasers Intenses et Applications, UMR 5107 CNRS-Université Bordeaux 1-CEA, Université Bordeaux 1, 33405 Talence, France Laboratoire pour l’Utilisation Lasers Intenses/Physique Atomique des Plasmas Denses, UMR 7605 CNRS-CEA-Ecole Polytechnique-Université Paris VI, Université Paris VI, 75252 Paris, France 3 Centre de Physique Théorique, UMR 7644 CNRS-Ecole Polytechnique, Ecole Polytechnique...

Stimulated Backscattering From Relativistic Unmagnetized Electron Beams

An electron–positron beam–plasma instability

Using a new technique to generate cold electron beams, an electron-beam positron-plasma experiment was performed in a previously unexplored range of energies. An electron beam, formed from a thermalized room-temperature electron plasma, is transmitted through a positron plasma stored in a quadrupole Penning trap geometry. The transit-time instability, which is excited by the beam, was previousl...

Ultrarelativistic Electron-Positron Plasma

Ultrarelativistic electron-positron plasmas can be produced in high-intensity laser fields and play a role in various astrophysical situations. Their properties can be calculated using QED at finite temperature. Here we will use perturbative QED at finite temperature for calculating various important properties, such as the equation of state, dispersion relations of collective plasma modes of p...