Multigroup kinetic description of X-ray transport in hohlraums

Abstract

The article presents the multigroup kinetic approximation of radiation transport in hohlraum systems. The view factor-based method of numerical solution is proposed. Its advantages are a detailed account of the problem geometry and accurate handling of the solution angular anisotropy and discontinuities. The method is computationally efficient and easily parallelizable. Coupled to the kinetic ϩ hydro description of the wall dynamics, it represents a powerful tool for integrated investigation of the systems with strongly inhomogeneous optical properties.

Opacities and line transfer in high density plasma

“…Optical properties of plasmas are a powerful tool for plasma diagnostics, which is a key issue to understand beam plasma interaction phenomena with intense laser and particle beams Deutsch, 2004;Hasegawa, 2003;Kato, 2004;Baldina, 2004!. As it is known, optical properties depend strongly on the level populations in the plasma. For this reason, it is necessary to calculate the populations with high accuracy.…”