诊断LiF单晶弹性变形的瞬态X射线衍射

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7 mm×7 mm、厚300 μm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。

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.

参考文献

[1] Johnson Q, Mitchell A C, Keeler R N, et al. X-ray diffraction during shock-wave compression[J]. Phys Rev Lett, 1970, 25(16): 1099-1101.

[2] Johnson Q, Mitchell A C, Evans L. X-ray diffraction evidence for crystalline order and isotropic compression during the shock-wave process[J]. Nature, 1971, 231: 310-311.

[3] Johnson Q, Mitchell A C. First X-ray diffraction evidence for a phase transition during shock-wave compression[J]. Phys Rev Lett, 1972, 29(20): 1369-1371.

[4] Rigg P A, Gupta Y M. Real-time X-ray diffraction to examine elastic-plastic deformation in shocked lithium fluoride crystals[J]. Appl Phys Lett, 1998, 73(12): 1655-1657.

[5] Gupta Y M, Zimmerman K A, Rigg P A, et al. Experimental development to obtain real-time X-ray diffraction measurement in plate impact experiments[J]. Rev Sci Instrum, 1999, 70(10): 4008-4014.

[6] Rigg P A, Gupta Y M. X-ray diffraction measurements to determine longitudinal and transverse lattice deformation in shocked LiF[J]. Shock Compression of Condensed Matter, 1999, 923(8): 1051-1056.

[7] Almeida T D, Gupta Y M. Real-time X-ray diffraction measurements of the phase transition in KCl shocked along 100[J]. Phys Rev Lett, 2000, 85(2): 330-333.

[8] Rigg P A, Gupta Y M. Multiple X-ray diffraction to determine transverse and longitudinal lattice deformation in shocked lithium fluoride[J]. Phys Rev B, 2001, 63: 094112.

[9] Rigg P A, Gupta Y M. Time-resolved X-ray diffraction measurements and analysis to investigate shocked lithium fluoride crystals[J]. J Appl Phys, 2003, 93(6): 3291-3297.

[10] Jensen B J, Gupta Y M. X-ray diffraction measurements in shock compressed magnesium doped LiF crystals[J]. Journal of Applied Physics, 2006, 100: 053512.

[11] Jensen B J, Gupta Y M. Time-resolved X-ray diffraction experiments to examine the elastic-plastic transition in shocked magnesium-doped LiF[J]. Journal of Applied Physics, 2008, 104: 013510.

[12] Wark J S, Whitlock R R, Hauer A A. Subnanosecond X-ray diffraction from laser-shocked crystals[J]. Phys Rev B, 1989, 40(8): 5705-5715.

[13] Hauer A A, Wark J S, Kalantar D H. Transient X-ray diffraction and its application in material science and X-ray optics[C] //Proc of SPIE. 1997, 836: 1-15.

[14] Kalantar D H, Chandler E A, Colvin J D, et al. Transient X-ray diffraction used to diagnose shock compressed Si crystals on the Nova laser[J]. Rev Sci Instrum, 1999, 70(1): 629-632.

[15] Kalantar D H, Belak J, Bringa E, et al. High-pressure, high-strain-rate lattice response of shocked materials[J]. Phys Plasmas, 2003, 10(5): 1569-1576.

[16] Hawreliak J, Colvin J D, Kalantar D H, et al. An analysis of the X-ray diffraction signal for the α-ε transition in shock-compressed iron: Simulation and experiment[R]. UCRL-JRNL-220707, 2006.

[17] 刘利锋, 肖沙里, 王洪建, 等.球面弯晶在X射线诊断中的应用[J]. 强激光与粒子束, 2010, 22(10): 2313-2316.(Liu Lifeng, Xiao Shali, Wang Hongjian, et al. Application of spherically bent crystals spectrometer to X-ray diagnosis. High Power Laser and Particle Beams, 2010, 22(10): 2313-2316)

[18] 王洪建, 肖沙里, 施军, 等.Z箍缩等离子体X射线凸晶谱议[J]. 强激光与粒子束, 2011, 23(2): 403-406.(Wang Hongjian, Xiao Shali, Shi Jun, et al. Convex crystals spectrometer for Z-pinch plasma X-ray diagnosis. High Power Laser and Particle Beams, 2011, 23(2): 403-406)

[19] 陈伯伦, 韦敏习, 杨正华, 等.球面弯晶的背光成像特性[J]. 强激光与粒子束, 2013, 25(3): 641-645.(Chen Bolun, Wei Minxi, Yang Zhenghua, et al. Character of backlight imaging based on spherically bent crystal. High Power Laser and Particle Beams, 2013, 25(3): 641-645)

[20] Gupta Y M, Turneaure S J, Perkins K, et al. Real-time, high-resolution X-ray diffraction measurements on shocked crystals at a synchrotron facility[J]. Rev Sci Instrum, 2012, 83: 123905.

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. 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.

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