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Workshop on Computation of Kinetic Transport and Related Problems

Introduction to the Numerical Simulation of Radiation Transport in the Laser Indirect-Driven Inertial Confinement Fusion


Peng Song(宋鹏) , Institute of Applied Physics and Computational Mathematics


22 Jun, 09:40 - 10:20


The new-type green energy resource is an important issure in the development of the human’s society on earth, as a result of the enormous increasing of the energy requirement. Fusion resource has many advantages, such as high energy density, abundant materials, low environment pollution, etc. Fusion is considered as one of the most possible energy resources for human beings in future. The controllable fusion can supply abundant, economic, safe and clean energy. Laser indirect-driven inertial confinement fusion (ICF) is one way to control fusion in experiment lab. The main process of ICF has four steps. First, laser beams with high energy is generated by the laser facility, and is irradiated into a hohlraum made by high-Z material. Second, high-Z material transforms the laser energy to X-ray, and X-ray transports in the hohlraum, some of which escapes the hohlraum by the hole and some are irradiated on the capsule. Third, the capsule is ablated by X-ray and the center made by nuclear fuel is compressed and a hot spot is formed with high density and high temperature. Finally, the fusion condition is reached in the hot spot and more fuel is ignited, then more energy is released than the laser energy. Laser indirect-driven ICF contains many physical processes. Radiation transport is one of the most important model to describe the energy transform and transport in hohlraum, which determines the radiation spatial and spectral distribution, the driven source’s pulse and asymmetry of the capsule. Radiation transport’s degree of freedom is so large that the numerical simulation of radiation transport expends more than a half of the computing resource of the entire numerical simulation of ICF, thus how to improve the computing efficiency of radiation transport’s numerical method is significant and attractive. This talk will introduce the main process of ICF, and the general numerical methods and difficulties of radiation transport’s simulation. More communication and cooperation is expected.