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纳秒级强激光(～1014 W/cm2)与固体靶相互作用可以获得高亮度的Multi-keV能段 X射线. 在当前的高能量密度物理研究中利用这样的X射线背光源照相方式可以获得高质量的物理图像, 具有重要的应用价值. 以模拟计算与神光II激光装置实验结果相结合的方式研究了激光等离子体发光模型. 在该模型的基础上改进了针孔点背光成像技术, 独立发展了针对低Z靶材料K线的准单能背向针孔点背光和针对中Z靶材料L带的高亮度侧向针孔点背光.在神光II激光装置上通过新型针孔点背光对惯性约束聚变靶丸样品成像获得了高质量的静态靶丸流线图像, 空间分辨优于10 μm. 实验结果表明新型的针孔点背光具备高亮度, 高空间分辨, 高图像衬度等优点可以广泛应用于高能量密度物理和惯性约束聚变的研究中.High flux, Multi-keV X-rays, can be efficiently produced from nano-second laser interaction with metal target. Multi-keV backlight X-ray source is very important in inertial confinement fusion and high-energy density physics research. The one-dimensional numerical simulation results propose a laser plasmas radiation model, and the model is compared well with Shenguang II experimental results. The pinhole-assisted point-projection (PAPP) backlight is improved by the model; the rear-on PAPP backlight for low-Z metal target and the side-on PAPP backlight for middle-Z metal target are developed. The experiment is performed on Shenguang II 9th laser facility. The static stream line obtained with novel PAPP backlight provides high-quality capsule image, and the spatial resolution is better than 10 μm. Results show that novel PAPP backlight has advantages of traditional PAPP in source brightness, spatial resolution and image contrast.
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Keywords:
- high-energy density physics /
- inertial confinement fusion /
- laser plasmas /
- pinhole-assisted point-projection backlight
[1] 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. 57 985 (in Chinese) [张继彦, 杨家敏, 许琰, 杨国洪, 颜君, 孟广为, 丁耀南, 汪艳 2008 57 985]
[2] Kirkwood R K, Milovich J, Bradley D K, Schmitt M, Goldman S R, Kalantar D H, Meeker D, Jones O S, Pollaine S M, Amendt P A, Dewald E, Edwards J, Landen O L, Nikroo A 2009 Phys. Plasmas 16 012702
[3] Landen O L, Boehly T R, Bradley D K, Braun D G, Callahan D A, Celliers P M, Collins G W, Dewald E L, Divol L, Glenzer S H, Hamza A, Hicks D G, Hoffman N, Izumi N, Jones O S, Kirkwood R K, Kyrala G A, Michel P, Milovich J, Munro D H, Nikroo A, Olson R E, Robey H F, Spears B K, Thomas C A, Weber S V, Wilson D C, Marinak M M, Suter L J, Hammel B A, Meyerhofer D D, Atherton J, Edwards J, Haan S W, Lindl J D, MacGowan B J, Moses E I 2010 Phys. Plasmas 17 056301
[4] Matthews D L, Campbell E M, Ceglio N M, Hermes G, Kauffman R, Koppel L, Lee R, Manes K, Rupert V, Slivinsky W, Turner R, Ze F 1983 J. Appl. Phys. 54 4260
[5] Kodama R, Mochizuki T, Tanaka K A, Yamanaka C 1983 Appl. Phys. Lett. 50 720
[6] Bullock A B, Landen O L, Bradley D K 2001 Rev. Sci. Instrum. 72 690
[7] Blue B E, Hansen J F, Tobin M T, Eder D C, Robey H F 2004 Rev. Sci. Instrum. 75 4775
[8] Kuranz C C, Blue B E, Drake R P, Robey H F, Hansen J F, Knauer J P, Grosskopf M J, Krauland C, Marion D C 2006 Rev. Sci. Instrum. 77 10E327
[9] Hu G Y, Zhang J Y, Zheng J, Shen B F, Liu S Y, Yang J M, Ding Y K, Hu X, Huang Y X, Du H B, Yi R Q, Lei A L, Xu Z Z 2008 Laser and Particle Beams 26 661
[10] Hu G Y, Zheng J, Shen B F, Lei A L, Liu S Y, Zhang J Y, Yang J M, Ding Y K, Hu X, Huang Y X, Du H B, Yi R Q, Xu Z Z 2008 Phys. Plasmas 15 023103
[11] Pu Y D, Zhang J Y, Yang J M, Huang T X, Ding Y K 2011 Chin. Phys. B 20 015202
[12] Pu Y D, Chen B L, Zhang L, Yang J M, Huang T X, Ding Y K 2011 Chin. Phys. B 20 095203
[13] Babonneau D, Primout M, Girard F, Jadaud J P, Naudy M, Villette B, Depierreux S, Blancard C, Faussurier G, Fournier K B, Suter L, Kauffman R, Glenzer S, Mille M C, Grn J, Davis J 2008 Phys. Plasmas 15 092702
[14] Girard F, Primout M, Villette B, Stemmler P, Jacquet L, Babonnea D, Fournier K B 2009 Phys. Plasmas 16 052704
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[1] 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. 57 985 (in Chinese) [张继彦, 杨家敏, 许琰, 杨国洪, 颜君, 孟广为, 丁耀南, 汪艳 2008 57 985]
[2] Kirkwood R K, Milovich J, Bradley D K, Schmitt M, Goldman S R, Kalantar D H, Meeker D, Jones O S, Pollaine S M, Amendt P A, Dewald E, Edwards J, Landen O L, Nikroo A 2009 Phys. Plasmas 16 012702
[3] Landen O L, Boehly T R, Bradley D K, Braun D G, Callahan D A, Celliers P M, Collins G W, Dewald E L, Divol L, Glenzer S H, Hamza A, Hicks D G, Hoffman N, Izumi N, Jones O S, Kirkwood R K, Kyrala G A, Michel P, Milovich J, Munro D H, Nikroo A, Olson R E, Robey H F, Spears B K, Thomas C A, Weber S V, Wilson D C, Marinak M M, Suter L J, Hammel B A, Meyerhofer D D, Atherton J, Edwards J, Haan S W, Lindl J D, MacGowan B J, Moses E I 2010 Phys. Plasmas 17 056301
[4] Matthews D L, Campbell E M, Ceglio N M, Hermes G, Kauffman R, Koppel L, Lee R, Manes K, Rupert V, Slivinsky W, Turner R, Ze F 1983 J. Appl. Phys. 54 4260
[5] Kodama R, Mochizuki T, Tanaka K A, Yamanaka C 1983 Appl. Phys. Lett. 50 720
[6] Bullock A B, Landen O L, Bradley D K 2001 Rev. Sci. Instrum. 72 690
[7] Blue B E, Hansen J F, Tobin M T, Eder D C, Robey H F 2004 Rev. Sci. Instrum. 75 4775
[8] Kuranz C C, Blue B E, Drake R P, Robey H F, Hansen J F, Knauer J P, Grosskopf M J, Krauland C, Marion D C 2006 Rev. Sci. Instrum. 77 10E327
[9] Hu G Y, Zhang J Y, Zheng J, Shen B F, Liu S Y, Yang J M, Ding Y K, Hu X, Huang Y X, Du H B, Yi R Q, Lei A L, Xu Z Z 2008 Laser and Particle Beams 26 661
[10] Hu G Y, Zheng J, Shen B F, Lei A L, Liu S Y, Zhang J Y, Yang J M, Ding Y K, Hu X, Huang Y X, Du H B, Yi R Q, Xu Z Z 2008 Phys. Plasmas 15 023103
[11] Pu Y D, Zhang J Y, Yang J M, Huang T X, Ding Y K 2011 Chin. Phys. B 20 015202
[12] Pu Y D, Chen B L, Zhang L, Yang J M, Huang T X, Ding Y K 2011 Chin. Phys. B 20 095203
[13] Babonneau D, Primout M, Girard F, Jadaud J P, Naudy M, Villette B, Depierreux S, Blancard C, Faussurier G, Fournier K B, Suter L, Kauffman R, Glenzer S, Mille M C, Grn J, Davis J 2008 Phys. Plasmas 15 092702
[14] Girard F, Primout M, Villette B, Stemmler P, Jacquet L, Babonnea D, Fournier K B 2009 Phys. Plasmas 16 052704
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