Effects of non-local thermodynamic equilibrium conditions on numerical simulations of inertial confinement fusion plasmas

被引：7

作者：

Gupta, NK ^{[1
]}

Godwal, BK ^{[1
]}

机构：

[1] Bhabha Atom Res Ctr, High Pressure Phys Div, Bombay 400085, Maharashtra, India

来源：

PRAMANA-JOURNAL OF PHYSICS | 2002年 / 59卷 / 01期

关键词：

non-LTE; opacity; emissivity; ICF; radiation transport; hydrodynamics; conversion efficiency;

D O I：

10.1007/s12043-002-0031-6

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Effects of non-local thermodynamic equilibrium (non-LTE) condition on emission and hydrodynamics of typical inertial confinement fusion (ICF) plasmas are studied. The average degree of ionization at high temperatures is seen to be much lower compared to the values obtained from Thomas-Fermi scaling or Saha equation for high-Z element like gold. LTE and non-LTE predictions for emitted radiation from laser-driven gold foil are compared with the experimental results and it is seen that non-LTE simulations show a marked improvement over LTE results. The effects of one group and multigroup, LTE and non-LTE approximations of radiation transport on hydrodynamic parameters are studied for laser-driven aluminium and gold foils. It is further seen that non-LTE and multigroup effects play an important role in predicting conversion efficiency of laser light to X-rays.

引用

页码：33 / 51

页数：19

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