| 诊断LiF单晶弹性变形的瞬态X射线衍射 |
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| 引用本文： | 王海容,肖沙里,阳庆国,叶雁,李牧,李俊,彭其先,李泽仁.诊断LiF单晶弹性变形的瞬态X射线衍射[J].强激光与粒子束,2014,26(2):024004-258. |
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| 作者姓名： | 王海容 肖沙里 阳庆国 叶雁 李牧 李俊 彭其先 李泽仁 |
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| 作者单位： | 1.中国工程物理研究院 流体物理研究所, 四川 绵阳 621 900; |
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| 基金项目： | 国家自然科学青年基金项目(11005098) |
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| 摘 要： | 利用瞬态X射线衍射技术对LiF单晶沿晶向100]方向冲击加载的晶格变形进行了诊断研究。实验在神光Ⅱ装置的球形靶上进行,北四路激光驱动Cu靶获得的类He线作为X射线背光源,第九路为加载光源,对大小为7mm×7mm、厚300μm的受激光加载的LiF单晶衍射,实验获得了LiF单晶晶面(200)压缩和未压缩状态的衍射信号。实验结果表明:LiF单晶在激光沿100]方向冲击加载下,晶格发生了弹性变形,(200)晶面间距变小,衍射线上移,晶格压缩量为11%;该瞬态X射线衍射技术可用于冲击加载下的微观动态响应特性测量。
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| 关 键 词： | 瞬态X射线衍射 LiF单晶 冲击压缩 弹性变形 成像板 |
| 收稿时间： | 2013-07-16; |
Transient X-ray diffraction to diagnose elastic deformation of shocked lithium fluoride single crystal |
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| Wang Hairong,Xiao Shali,Yang Qingguo,Ye Yan,Li Mu,Li Jun,Peng Qixian,Li Zeren.Transient X-ray diffraction to diagnose elastic deformation of shocked lithium fluoride single crystal[J].High Power Laser and Particle Beams,2014,26(2):024004-258. |
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| Authors: | Wang Hairong Xiao Shali Yang Qingguo Ye Yan Li Mu Li Jun Peng Qixian Li Zeren |
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| Affiliation: | 1.Institute of Fluid Physics,CAEP,P.O.Box 919-109,Mianyang 621900,China;2.Key Laboratory of Optoelectronic Technology and System Chongqing University,Ministry of Education,Chongqing 400030,China |
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| Abstract: | Transient X-ray diffraction was used to diagnose the elastic deformation of the LiF single crystal which was shocked along the ［100］ direction. The experiment was implemented in Shenguang Ⅱ. High-intensity lasers irradiated a thin Cu foil to generate helium-like rays as X-ray source, another laser beam irradiated LiF single crystal which was 7 mm×7 mm in size, 300 μm in thickness as the shocked source. Image plate recorded the shocked diffraction signal of the lattice plane (200) as well as the unshocked signal. The experimental results show that the crystal lattice is compressed, lattice spacing in (200) decreases to result in shifting upwards. The positions of the diffraction lines associated with the (200) lattice plane indicate the compression along ［100］ direction by 11%. What’s more, the results show that it is useful for diagnosing the microscopic dynamic response of the material by transient X-ray diffraction. |
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| Keywords: | single crystal LiF shock compression elastic deformation image plate |
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