Forward scattering and filamentation of a spatially smoothed laser pulse in the hydrodynamic and kinetic frameworks

摘要: We address the scattering of a high energy laser pulse on large wavelength acoustic turbulence relevance for Laser M'egajoule or National Ignition Facility-class experiments. Both kinetic and hydrodynamic frameworks are adopted combined with linearized description propagation. The resulting dispersion relations display important contributions to growth forward Brillouin instability. Moreover, proof is made that spatial incoherence often used in facilities is, cold enough plasmas multi-ion species case, not reach full control filamentation. Comparisons experimental results dedicated simulations confirm our results. derived present new tools assessing propagation quality deposition region pulses. They also underline importance accounting effects, even millimeter nanosecond scale many inertial confinement fusion high-energy-density