Some Thoughts on the Role of non-LTE Physics in ICF

Colvin, J. D.¹ 

[1]Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)

关键词: INERTIAL CONFINEMENT;    LASER-RADIATION HEATING;    LASER-PRODUCED PLASMA;    PLASMA DENSITY;    METALS;    ELECTRONS;    FOAMS;    DOPED MATERIALS;    K SHELL;    KEV RANGE;    L SHELL;    X-RAY SOURCES;    ELECTRON TEMPERATURE;    HEATING RATE;    ION TEMPERATURE;   

DOI  :  10.2172/1241967
RP-ID  :  LLNL--TR-685151
PID  :  OSTI ID: 1241967
Others  :  TRN: US1600908

学科分类：原子、分子光学和等离子物理

美国|英语

来源: SciTech Connect

【 摘 要 】

An effort to develop sub-critical-density high-Z metal-doped and pure metal foams as laser-driven x-ray sources is described. The main idea is that the laser beams preferentially heat the electrons, and if the plasma is sufficiently low density so that the heating rate is greater than the equilibration rate via electron-ion collisions, then the electron temperature in the plasma is much greater than the ion temperature as long as the laser is on. In such a situation the plasma is not in local thermal equilibrium (LTE), it heats supersonically and volumetrically, and the conversion efficiency of laser beam energy to multi-keV L-shell and K-shell radiation is much higher than what it would be in LTE plasma.