神光Ⅱ装置x射线辐射在低密度CH泡沫中的超声速传播实验研究

在“神光Ⅱ”的三倍频装置上进行实验，利用北四路激光注入半腔靶后接不同密度、不同厚度的CH（C₆6H₁₂，聚4甲基1戊烯）发泡材料，研究x射线辐射在低密度CH泡沫中的超声速传播问题，对x射线辐射的多个能点（80,250和400eV）的传播时间、传播速度、输运管壁收缩过程、时间能谱和辐射温度等进行了测量，获得了10倍的超声速传输的速度，并采用辐射输运“漏水管模型”对实验结果进行了简要分析，结果基本相符 . 关键词： 辐射输运 超声速热波 CH发泡

Experimental investigation of supersonic x-ray transport in radiatively heated CH foam cylinders on ShenguangⅡfacilities

Supersonic radiation transport, where the ratio of the radiation wave front velocity to the material sound speed was more than 10, has been investigated experimentally in the low-density foam. Four beams of 0.35μm laser with pulse d uration of 1ns and 2kJ of total energy entered into a hohlraum to create intense x-ray radiation that heated C₆6H₁₂