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

Pramana

N K Gupta1¹  B K Godwal¹ 

[1] High Pressure Physics Division, Bhabha Atomic Research Centre, Mumbai 400 085, India$$

关键词: Non-LTE;    opacity;    emissivity;    ICF;    radiation transport;    hydrodynamics;    conversion efficiency.;   

DOI  :  

学科分类：物理（综合）

来源: Indian Academy of Sciences

【 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

【 授权许可】

Unknown