Radiation-Matter Coupling for Low Density Plasmas
Radiation can have a dramatic effect on the material properties of low density plasmas, altering bulk properties such as energy density and specific heat as well as spectral characteristics such as opacity and emissivity. The response of the material to radiation must be considered when constructing transport algorithms that are intended to provide self-consistent solutions for both the radiation field and plasma properties. It consistent can affect almost every aspect of the numerical solution, from the overall solution strategy down to details of the acceleration algorithms. We discuss these issues in the context of one approach towards improving the stability and convergence of the solution, with examples relevant to high-energy density physics. We also present a direct solution technique for the energy linearized multigroup radiation transport equations that sidesteps the need for a multigroup acceleration process and can be used to benchmark the performance of iterative algorithms.
- Research Organization:
- Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
- Sponsoring Organization:
- USDOE
- DOE Contract Number:
- W-7405-ENG-48
- OSTI ID:
- 891731
- Report Number(s):
- UCRL-PROC-213610; TRN: US0605486
- Resource Relation:
- Conference: Presented at: Joint Russian-American Five-Laboratory Conference on Computational Mathematics/Physics, Vienna, Austria, Jun 17 - Jun 25, 2005
- Country of Publication:
- United States
- Language:
- English
Similar Records
Development and Benchmarking of a Hybrid PIC Code For Dense Plasmas and Fast Ignition
thornado-transport: Anderson- and GPU-accelerated nonlinear solvers for neutrino-matter coupling