利用混合介质降低黑腔壁辐射能耗的理论研究

 采用Au-Gd混合介质作腔壁，增大腔壁Rosseland不透明度，降低其辐射能耗是提高黑腔辐射温度的途径之一。利用纯Au和Au-Gd混合介质的Rosseland平均辐射不透明度数据库和多次电离区物态方程加入一维辐射流体力学程序，计算分析了在神光 Ⅱ激光装置产生的黑腔X光辐射能源条件下， Au-Gd混合介质作腔壁对提高黑腔辐射温度的影响，得到了Au-Gd混合介质作腔壁可使黑腔辐射温度提高0.1~0.2MK的结论。

Theoretical research on reducing radiation energy loss of hohlraum wall by Au-Gd mixture

The Rosseland mean opacity of hohlraum gold wall can be increased by adding other materials such as gadolinium to gold. At 0.1g/cm~3 density and various radiation temperatures,the Au-Gd mixtures with equal fractional number density yield highest opacities. Using one-dimension radiation hydrodynamics code RT87 combined with the Rosseland mean opacity database and state equations at multiple-ionized area,the radiation temperature of pure Au and Au-Gd mixture wall hohlraum were investigated under the condition of X-ray source produced at Shenguang-II laser facility. The simulation results show radiation energy loss of the wall decrease and radiation temperature increase 0.1～0.2MK for Au-Gd mixture hohlraum.