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ICF内爆物理研究中,示踪元素X射线谱诊断方法是推测内爆压缩温度、 密度以及燃料混合状态的有效方法.针对其中的非平衡物理过程, 研制了非局域热动平衡(non-LTE)下一维谱线输运程序Alpha.程序以辐射流体计算给出的温度、 密度等量为输入条件,求解细致组态(DCA)模型下的原子动力学方程和辐射输运方程, 自洽给出谱线不透明度,和成像面上的X射线谱分布.利用该程序,模拟了神光Ⅱ装置上的掺Ar靶丸内爆示踪元素X射线谱诊断实验, 研究结果表明,谱线的自吸收效应影响发射的X射线谱的强度和形状, 谱线的宽度对自吸收效应的强弱也有影响.因此,在对X射线谱的数值模拟中应该考虑自吸收效应. 另外,与LTE近似下的发射谱的比较表明, LTE近似下,等离子体电离度大～1, 发射谱的形状与non-LTE的结果不同,且LTE近似下,谱线的强度比non-LTE的谱线强度大5-10倍, 采用LTE近似是不合适的.
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关键词:
- 内爆物理 /
- 示踪元素诊断 /
- non-LTE谱线输运 /
- 细致组态模型(DCA)
X-ray spectrum of tracer in ICF implosion target is usually used to infer electron temperature, density and mix of fuel. As the plasma in fuel is in non-local thermodynamic equilibrium (non-LTE), a line transfer code Alpha is developed. Taking the electron temperature and density provided by radiation hydrodynamic as input condition, atomic kinetics and radiation transfer equation are self-consistently solved with the detailed configuration atom (DCA) model. The opacity for specified frequency intervals is obtained, and X-ray spectrum in the image plane is also presented.As application of Alpha program, the spectrum of doped Ar in implosion target on SG Ⅱ laser facility is simulated. The effect of self-absorption of K α line is studied. And it is shown that self-absorption of K α line affects both the intensity and shape of the spectrum, and it should be considered in simulating X-ray spectrum of Ar. And as the spectrum of local thermodynamic equilibrium (LTE) simulation gives large intensity and different shapes compared with the non-LTE results, non-LTE simulation is necessary in such a simulation.-
Keywords:
- implosion target /
- tracer Spectrum /
- non-local equilibrium (non-LTE) line transfer /
- detailed configuration atom (DCA) model
[1] Hammel B A, Keane C J, Dittrich T R, Kania D R, Kilkenny J D, Lee R W, Kevedahl W K 1994 JQSRT 51 113
[2] Woolsey N C, Hammel B A, Keane C J, Asfaw A, Back C A, Moreno J C, Nash J K, Calisti A, Mossé C, Stamm R, Talin B, Klein L, Lee R W 1997 Phys. Rev. E 56 2314
[3] Welser-Sherrill L, Mancini R C, Koch J A, Izumi N, Tommasini R, Haan S W, Haynes D A, Golovkin I E, Macfarlane J J, Delettrez J A, Marshall F J, Regan S P, Smalyuk V A, Kyrala G 2007 Phys. Rew. E 76 056403
[4] Florido R, Mancini R C, Nagayama T, Tommasini R, Delettrez J A, Regan S P, Yaakobi B 2011 Phys. Rev. E 83 066408
[5] Hammel B A, Scott H A, Regan S P, Cerjan C, Clark D S, Edwards M J, Epstein R, Glenzer S H, Haan S W, Izumi N, Koch J A, Kyrala G A, Landen O L, Langer S H, Peterson K, Smalyuk V A, Suter L J, Wilson D C 2011 Phys. Plasmas 18 056310
[6] Keane C J, Pollak G W, Cook R C, Dittrich T R, Hammel B A, Landen L, Langer S H, Levedahl W K, Munro D H, Scott H A, Zimmerman G B 1995 JQSRT 54 207
[7] Langer S H, Scott H A, Marinak M M, Landen O L 2001 JQSRT 71 479
[8] Langer S H, Scott H A, Marinak M M, Landen O L 2003 JQSRT 81 275
[9] Zhang J Y, Yang G H, Miao W Y, Ding Y N 2006 High Power Laser and Particle Beams 18 939 (in Chinese) [张继彦, 杨国洪, 缪文勇, 丁耀南 2006 强激光与粒子束 18 939]
[10] Gao Y M, Li M, Li Y S, Kang D G, Li Y S 2001 High Power Laser and Particle Beams 23 693 (in Chinese) [高耀明, 李蒙, 李永升, 康洞国, 李沄生 2011 强激光与粒子束 23 693]
[11] Duan B, Wu Z Q, Wang J G 2009 Chin. Sci. G 39(1) 43 (in Chinese) [段斌, 吴泽清, 王建国 2009 中国科学G辑 39(1) 43]
[12] Duan B, Wu Z Q, Wang J G 2009 Chin. Sci. G 39 241 (in Chinese) [段斌, 吴泽清, 王建国 2009 中国科学G辑 39 241]
[13] Zhou J Y, Huang T X, Meng L 2008 High Power Laser and Particle Beams 20 1658 (in Chinese) [周近宇, 黄天眩, 蒙林 2008 强激光与粒子束 20 1658]
[14] Gao Y M, Lü X, Li Y S, Li M 2007 High Power Laser and Particle Beams 19 1858 (in Chinese) [高耀明, 吕信, 李沄生, 李蒙 2007 强激光与粒子束 19 1858]
[15] Scott H A 2001 JQSRT 71 689
[16] Scott H A, Mayle R W 1994 Appl. Phys. B 58 35
[17] Macfarlane J J, Golovkin I E, Woodruff P R 2006 JQSRT 99 381
[18] Macfarlane J J, GolovkinI E, Wang P, Woodruff P R, Pereyra N A 2007 HEDP 3 181
[19] Peyrusse O 1992 Phys. Fluids B 4 2007
[20] Pollak G D, Delamater N D, Nash J K, Hammel B A 1994 JQSRT 51 303
[21] Chung H K, Chen M H, Morgan W L, Ralchenko Y, Lee R W 2005 HEDP 1 3
[22] Dittrich T R, Hammel B A, Keane C J, McEachern R, Turner R E, Haan S W, Suter L J 1994 Phys. Rev. Lett. 73 2324
[23] Scott H A, Hansen S B 2010 HEDP 6 39
[24] MacFarlane J J, Golovkin I E, Mancini R C, Welser L A, Bailey J E, Koch J A, Mehlhorn T A, Rochau G A, Wang P, Woodruff P 2005 Phys. Rew. E 72 066403
[25] Zhang G P, Zhang T X, Zheng W D 2004 High Power Laser and Particle Beams 16 35 (in Chinese) [张国平, 张覃鑫, 郑无敌 2004 强激光与粒子束 16 35]
[26] Qiao X M, Zhang G P 2007 Acta Phys. Sin. 56 5248 (in Chinese) [乔秀梅, 张国平 2007 物理学报 56 5248]
[27] Zhang G P, Zhang T X, Zheng W D, Qiao X M 2007 Chin. Phys. 16 2433
[28] Calisti A, Khelfaoui F, stamm R, Talin B, Lee R W 1990 Phys. Rev. A 42 5433
[29] Woolsey N C, Hammel B A, Keane C J, Back C A, Moreno J C, Nash J K, Calisti A, Mosses C, Godbert L, Stamm R, Talin B, Hooper C F, Asfaw A, Klein L S, Lee R W 1997 JQSRT 58 975
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[1] Hammel B A, Keane C J, Dittrich T R, Kania D R, Kilkenny J D, Lee R W, Kevedahl W K 1994 JQSRT 51 113
[2] Woolsey N C, Hammel B A, Keane C J, Asfaw A, Back C A, Moreno J C, Nash J K, Calisti A, Mossé C, Stamm R, Talin B, Klein L, Lee R W 1997 Phys. Rev. E 56 2314
[3] Welser-Sherrill L, Mancini R C, Koch J A, Izumi N, Tommasini R, Haan S W, Haynes D A, Golovkin I E, Macfarlane J J, Delettrez J A, Marshall F J, Regan S P, Smalyuk V A, Kyrala G 2007 Phys. Rew. E 76 056403
[4] Florido R, Mancini R C, Nagayama T, Tommasini R, Delettrez J A, Regan S P, Yaakobi B 2011 Phys. Rev. E 83 066408
[5] Hammel B A, Scott H A, Regan S P, Cerjan C, Clark D S, Edwards M J, Epstein R, Glenzer S H, Haan S W, Izumi N, Koch J A, Kyrala G A, Landen O L, Langer S H, Peterson K, Smalyuk V A, Suter L J, Wilson D C 2011 Phys. Plasmas 18 056310
[6] Keane C J, Pollak G W, Cook R C, Dittrich T R, Hammel B A, Landen L, Langer S H, Levedahl W K, Munro D H, Scott H A, Zimmerman G B 1995 JQSRT 54 207
[7] Langer S H, Scott H A, Marinak M M, Landen O L 2001 JQSRT 71 479
[8] Langer S H, Scott H A, Marinak M M, Landen O L 2003 JQSRT 81 275
[9] Zhang J Y, Yang G H, Miao W Y, Ding Y N 2006 High Power Laser and Particle Beams 18 939 (in Chinese) [张继彦, 杨国洪, 缪文勇, 丁耀南 2006 强激光与粒子束 18 939]
[10] Gao Y M, Li M, Li Y S, Kang D G, Li Y S 2001 High Power Laser and Particle Beams 23 693 (in Chinese) [高耀明, 李蒙, 李永升, 康洞国, 李沄生 2011 强激光与粒子束 23 693]
[11] Duan B, Wu Z Q, Wang J G 2009 Chin. Sci. G 39(1) 43 (in Chinese) [段斌, 吴泽清, 王建国 2009 中国科学G辑 39(1) 43]
[12] Duan B, Wu Z Q, Wang J G 2009 Chin. Sci. G 39 241 (in Chinese) [段斌, 吴泽清, 王建国 2009 中国科学G辑 39 241]
[13] Zhou J Y, Huang T X, Meng L 2008 High Power Laser and Particle Beams 20 1658 (in Chinese) [周近宇, 黄天眩, 蒙林 2008 强激光与粒子束 20 1658]
[14] Gao Y M, Lü X, Li Y S, Li M 2007 High Power Laser and Particle Beams 19 1858 (in Chinese) [高耀明, 吕信, 李沄生, 李蒙 2007 强激光与粒子束 19 1858]
[15] Scott H A 2001 JQSRT 71 689
[16] Scott H A, Mayle R W 1994 Appl. Phys. B 58 35
[17] Macfarlane J J, Golovkin I E, Woodruff P R 2006 JQSRT 99 381
[18] Macfarlane J J, GolovkinI E, Wang P, Woodruff P R, Pereyra N A 2007 HEDP 3 181
[19] Peyrusse O 1992 Phys. Fluids B 4 2007
[20] Pollak G D, Delamater N D, Nash J K, Hammel B A 1994 JQSRT 51 303
[21] Chung H K, Chen M H, Morgan W L, Ralchenko Y, Lee R W 2005 HEDP 1 3
[22] Dittrich T R, Hammel B A, Keane C J, McEachern R, Turner R E, Haan S W, Suter L J 1994 Phys. Rev. Lett. 73 2324
[23] Scott H A, Hansen S B 2010 HEDP 6 39
[24] MacFarlane J J, Golovkin I E, Mancini R C, Welser L A, Bailey J E, Koch J A, Mehlhorn T A, Rochau G A, Wang P, Woodruff P 2005 Phys. Rew. E 72 066403
[25] Zhang G P, Zhang T X, Zheng W D 2004 High Power Laser and Particle Beams 16 35 (in Chinese) [张国平, 张覃鑫, 郑无敌 2004 强激光与粒子束 16 35]
[26] Qiao X M, Zhang G P 2007 Acta Phys. Sin. 56 5248 (in Chinese) [乔秀梅, 张国平 2007 物理学报 56 5248]
[27] Zhang G P, Zhang T X, Zheng W D, Qiao X M 2007 Chin. Phys. 16 2433
[28] Calisti A, Khelfaoui F, stamm R, Talin B, Lee R W 1990 Phys. Rev. A 42 5433
[29] Woolsey N C, Hammel B A, Keane C J, Back C A, Moreno J C, Nash J K, Calisti A, Mosses C, Godbert L, Stamm R, Talin B, Hooper C F, Asfaw A, Klein L S, Lee R W 1997 JQSRT 58 975
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