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The high-precise opacity of the dense plasma has important applications in the design and simulation of fusion research, and in plasma diagnostics. Base on the novel technique of point-projection backlighting, a broadband high-resolution elliptical crystal X-ray spectrometer, which is used to measure simultaneously the self-emission spectrum, the backlighting source spectrum, and the transmission spectrum in one shot, is designed on the Shengguang-II laser facility. The process of the colliding-shock-compressed sample by laser-driven shock waves is also investigated using a one-dimensional radiation hydrodynamics code MULTI. In the measurement, the dense plasma, produced in aluminum by colliding shocks driven by laser beams, reaches a peak density several times that of a solid, and the short backlighting from the 3d-4f transition bands of ytterbium is used as an absorption source for time- and space-resolving diagnostics. Several experimental results are obtained, they are the X-ray source spectrum, the transmission spectrum, and the self-emission spectrum of the dense Al sample in one shot obtained by using the point-projection method, as well as X-ray-absorption fine-structure spectra, and the changes in the K-shell photo-absorption edge of aluminum as it was compressed by a laser-driven shock waves. The transmissivity distribution and red- shift around 80 m (with respect to the cold value of 1.56 keV) of the dense aluminum are also obtained. The data obtained are further analysed. As a result, a new theoretical model is developed.
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Keywords:
- plasma production by shock waves and compression /
- X-ray absorption spectra /
- line shift /
- fine structure
[1] DaSilva L, Ng A, Godwal B K, Chiu G, Cottet F, Richardson M C, Jaanimagi P A, Lee Y T 1989 Phys. Rev. Lett. 62 1623
[2] Campbell E M, Holmes N C, Libby S B, Remington B A, Teller E 1997 Laser and Particle Beams 15 607
[3] Stewart J, Pyatt K 1996 J. Astrophys. 144 1203
[4] Christian R H, Yarger F L 1955 J. Chem. Phys. 23 2042
[5] Wang F H, Chen J P, Meng X J, Zhou X M, Li X J, Sun Y S, Jing F Q 2001 Acta Phys. Sin. 50 1308 (in Chinese) [王藩侯, 陈敬平, 孟续军, 周显明, 李西军, 孙永盛, 经福谦 2001 物理学报 50 1308]
[6] Pisani F, Koening M 1999 Rev. Sci. Instrum. 70 3314
[7] Zhang J Y, Yang J M, Xu Y, Yang G H, Yan J, Meng G W, Ding Y N, Wang Y 2008 Acta Phys. Sin. 57 689 (in Chinese) [张继彦, 杨家敏, 许琰, 杨国洪, 颜君, 孟广为, 丁耀南, 汪艳 2008 物理学报 57 689]
[8] Anderson S G, Heeter R F, Booth R, Eming J, Fulkerson S, McCarville T, Norman D, Young B K F 2006 Rev. Sci. Instrum. 77 063115
[9] Audebert P, Renaudin P, Ceccotti S B, Geindre J P, Popovics C C, Tzortzakis S, Silvert V N, Shepherd R, Matsushima I, Gary S, Girard F, Peyrusse O, Gauthier J C 2005 Phys. Rev. Lett. 94 025004
[10] Zhao Y, Yang J M, Zhang J Y, Liu J S, Yuan X, Jin F T 2009 Rev. Sci. Instrum. 80 043505
[11] Cai L C, Chen Q F, Gu Y J, Jing F Q 2005 At. Mol. Phys. 22 43 (in Chinese) [蔡灵仓, 陈其峰, 顾云军, 经福谦 2005 原子与分子物理学报 22 43]
[12] Kuzee J A, Hall T A, Frey H D 1998 Phys. Rev. E 57 7060
[13] Godwal B K, Ng A, Silva L D, Lee Y T, Liber 1989 Phys. Rev. A 40 4521
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[1] DaSilva L, Ng A, Godwal B K, Chiu G, Cottet F, Richardson M C, Jaanimagi P A, Lee Y T 1989 Phys. Rev. Lett. 62 1623
[2] Campbell E M, Holmes N C, Libby S B, Remington B A, Teller E 1997 Laser and Particle Beams 15 607
[3] Stewart J, Pyatt K 1996 J. Astrophys. 144 1203
[4] Christian R H, Yarger F L 1955 J. Chem. Phys. 23 2042
[5] Wang F H, Chen J P, Meng X J, Zhou X M, Li X J, Sun Y S, Jing F Q 2001 Acta Phys. Sin. 50 1308 (in Chinese) [王藩侯, 陈敬平, 孟续军, 周显明, 李西军, 孙永盛, 经福谦 2001 物理学报 50 1308]
[6] Pisani F, Koening M 1999 Rev. Sci. Instrum. 70 3314
[7] Zhang J Y, Yang J M, Xu Y, Yang G H, Yan J, Meng G W, Ding Y N, Wang Y 2008 Acta Phys. Sin. 57 689 (in Chinese) [张继彦, 杨家敏, 许琰, 杨国洪, 颜君, 孟广为, 丁耀南, 汪艳 2008 物理学报 57 689]
[8] Anderson S G, Heeter R F, Booth R, Eming J, Fulkerson S, McCarville T, Norman D, Young B K F 2006 Rev. Sci. Instrum. 77 063115
[9] Audebert P, Renaudin P, Ceccotti S B, Geindre J P, Popovics C C, Tzortzakis S, Silvert V N, Shepherd R, Matsushima I, Gary S, Girard F, Peyrusse O, Gauthier J C 2005 Phys. Rev. Lett. 94 025004
[10] Zhao Y, Yang J M, Zhang J Y, Liu J S, Yuan X, Jin F T 2009 Rev. Sci. Instrum. 80 043505
[11] Cai L C, Chen Q F, Gu Y J, Jing F Q 2005 At. Mol. Phys. 22 43 (in Chinese) [蔡灵仓, 陈其峰, 顾云军, 经福谦 2005 原子与分子物理学报 22 43]
[12] Kuzee J A, Hall T A, Frey H D 1998 Phys. Rev. E 57 7060
[13] Godwal B K, Ng A, Silva L D, Lee Y T, Liber 1989 Phys. Rev. A 40 4521
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