X-ray conversion efficiency and radiation non-uniformity in the hohlraum experiments at Shenguang-III prototype laser facility

X-ray conversion efficiency and radiation non-uniformity in the hohlraum experiments at Shenguang-III prototype laser facility
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神光三号原型激光装置黑腔实验中的X射线转换效率和辐射不均匀性

DOI:
10.1063/1.4901919
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发表时间:
2014-11
期刊:
影响因子:
2.2
通讯作者:
etc.
etc.
中科院分区:
物理与天体物理3区
文献类型:
--
作者:
Huasen Zhang;Dong Yang;Peng Song;etc.

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利用神光III原型装置对黑腔辐射特性进行了实验研究,并采用二维LARED程序,采用多群辐射传输模型对黑腔辐射特性进行了数值模拟。测量的辐射温度与在宽激光能量范围内的模拟预测一致,表明在峰值辐射温度下X射线转换效率约为75%。精细的黑腔实验进一步表明,黑腔内部的辐射强度是显著不均匀的。热斑区的辐射通量比重辐射壁区的辐射通量高一倍以上。实验与模拟结果的一致性进一步证明了LARED程序在研究黑腔辐射特性方面的有效性。
The hohlraum radiation properties are studied experimentally by the Shenguang-III prototype laser facility and numerically by the two-dimensional code LARED with the multi-group radiation transfer model. The measured radiation temperature is consistent with the prediction of the simulations in a wide laser energy range, suggesting that the x-ray conversion efficiency is around 75% at the peak radiation temperature. The delicate hohlraum experiments further show that the radiation intensity inside the hohlraum is significantly non-uniform. The measured radiation flux of the hot spot region is over twice higher than that of the re-emitted wall region. Good agreements between the experiments and simulations further demonstrate the validity of the LARED code to study the hohlraum radiation properties.
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