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  

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

作　　者：江少恩[1] 孙可煦[1] 郑志坚[1] 丁永坤[1] 杨家敏[1] 缪文勇[1] 崔延莉[1] 陈久森[1] 于燕宁[1] 

机构地区：[1]中国工程物理研究院激光聚变研究中心,绵阳621900

出　　处：《物理学报》2004年第10期3413-3418,共6页Acta Physica Sinica

基　　金：国家高技术研究发展计划 (批准号 :863 -80 4-3 )资助的课题~~

摘　　要：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(C6 H1 2 ,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 ,2 5 0和 4 0 0eV)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 。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 duration of 1ns and 2kJ of total energy entered into a hohlraum to create intense x-ray radiation that heated C_6H_(12) aerogel of foams of varying length and density on the Shenguang Ⅱ laser facility. The soft x-ray spectrometers (Dante) provided the time delay and the velocity of the x-ray radiation propagation at three energies of 80, 250 and 400eV. The x-ray spectra and radiation temperature resolved temporally were simultaneously obtained with Dante. An x-ray streaked camera viewing the face-on at the energy of 700eV provided clean signatures of the radiation breakout from the rear of the foam sample and plasma filling in the cylindrical hohlraum. The model of `leakage pipe' on radiation transport was used to analyze the experimental results, and the data and model were basically consistent.

关 键 词：CH X射线辐射 实验研究 低密度 激光 注入 传播 同密 三倍频 传输 

分 类 号：O434.11[机械工程—光学工程]