背光阴影成像表征降温速率对ICF冷冻冰层均化的影响

王凯; 林伟; 刘元琼; 谢端; 黎军; 马坤全; 唐永建; 雷海乐

doi:10.7498/aps.61.195204

摘要

利用背光阴影成像技术研究了降温速率对惯性约束聚变(ICF)球形氘氘冷冻靶中燃料冰层均化的影响.实验中,首先对ICF冷冻靶温度场进行标定以确定靶丸处的温度,然后利用背光阴影成像系统对降温过程中靶丸内燃料冰层的空间变化进行实时原位测量,得到了不同降温条件下冷冻靶背光阴影成像图像中亮环的功率谱.实验结果表明:相比快速降温,台阶式缓慢降温有利于形成均匀的燃料冰层;同时验证了背光阴影成像技术表征ICF冷冻靶内冷冻冰层均化的有效性.

关键词:

Abstract

The effect of cooling rate on layering the deuterium ice inside inertial confinement fusion (ICF)spherical cryotarget is studied by backlit shadowgraphy. Experimentally, the temperature of ice is first determined by the calibration of temperature field around ICF cryotarget. The solidification process of deuterium in the cryotarget is in- situ characterized by backlit shadowgraphy. The power-spectrum density of the bright ring in shadowgraphy at different cooling rates is obtained. Experimental results demonstrate that the step-gradient slow cooling is favorable for forming uniform fuel ice in comparison with the rapid cooling. Furthermore, the validity of characterizing the ICF cryotarget layering by the backlit shadowgraphy is also verified.

Keywords:

作者及机构信息

1.
中国工程物理研究院激光聚变研究中心,绵阳 621900

基金项目: 国家自然科学基金(批准号: 51006093)资助的课题.

Authors and contacts

1.
Research Centre of Laser Fusion, China Academy of Engineering Physics, Mianyang 621900, China

Funds: Project supported by the National Natural Science Foundation of China (Grant No. 51006093).

参考文献

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[22]	Lamy F, Vosion Y, Diou A, Martin M, Jeannot L, Pascal G, Hermerel C 2005 Fusion Sci. Technol. 48 1307
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[24]	Liu Y Q, Zhao X S, Lei H L, Xie D, Gao D Z 2010 High Power Laser and Particle Beams 22 0012 (in Chinese) [刘元琼, 赵学森, 雷海乐, 谢端, 高党忠 2010 强激光与粒子束 22 0012]

施引文献

[1]	Hoffer J K, Foreman L R 1988 Phys. Rev. Lett. 60 1310
[2]	Combs S K 1993 Rev. Sci. Instrum. 64 1679
[3]	Lindl J 1995 Phys. Plasmas 2 3933
[4]	Sheliak J D, Hoffer J K, 1999 Fusion Technol. 35 234
[5]	Dai W, Tang Y J, Wang C Y, Sun W G 2009 Acta Phys. Sin. 58 7313 (in Chinese) [戴伟, 唐永建, 王朝阳, 孙卫国 2009 物理学报 58 7313]
[6]	Bi P, Liu Y Q, Tang Y J, Yang X D, Lei H L 2010 Acta Phys. Sin. 59 7531 (in Chinese) [毕鹏, 刘元琼, 唐永建, 杨向东, 雷海乐 2010 物理学报 59 7531]
[7]	Haan S W, Callahan D A, Edwards M J, Hammel B A , Ho D D, O S Jones, Lindl J D, MacGowan B J, Marinak M M, Munro D H, Pollaine S M, Salmonson J D, Spears B K, Suter L J 2009 Fusion Sci. Technol. 55 227
[8]	Kozioziemski B J, Kucheyev S O, Lugten J B, Koch J A, Moody J D, Chernov A A, Mapoles E A, Hamza A V, Atherton L J 2009 J. Appl. Phys. 105 093512
[9]	Miller J R, Fries R J, Press W J 1979 J. Nucl. Mater. 85-86 121
[10]	Mok L S, Kim K, Bernat T P 1985 Phys. Fluids 28 1227
[11]	Kim K, Krahn D L 1987 J. Appl. Phys. 61 2729
[12]	Collins G W, Bittner D N, Monsler E, Letts S, Mapoles E R, Bernat T P 1996 J. Vac. Sci. Technol. A 14 2897
[13]	Bittner D N, Collins G W, Sater J D 2003 Fusion Sci. Technol. 44 7492003
[14]	London R A, Kozioziemski B J, Marinak M M, Kerbel G D 2006 Fusion Sci. Technol. 49 608
[15]	Chen C M, Norimatsu T, Tsuda Y, Yamanaka T, Nakai S 1993 J. Vac. Sci. Technol. A 11 509
[16]	Mapoles E R, Sater J, Pipes J, Monsler E, 1997 Phys. Rev. E 55 3473
[17]	Kozioziemski B J, Koch J A, Barty A, Martz H E, Lee W K, Fezzaa K 2005 J. Appl. Phys. 97 063103
[18]	Wang X F, Wang J Y 2010 Acta Phys. Sin. 60 025212 (in Chinese) [王晓方, 王晶宇 2011 物理学报 60 025212]
[19]	Nikitenko A I, Tolokonnikov S M 2007 Fusion Sci. Technol. 51 705
[20]	Lei H L, Li J, Tang Y J, Liu Y Q 2009 Rev. Sci. Instrum. 80 033103S
[21]	Lei H L, Li J, Tang Y J, Shi H L, Liu Y Q 2009 High Power Laser and Particle Beams 21 0053 (in Chinese) [雷海乐, 黎军, 唐永建, 师洪丽, 刘元琼 2009 强激光与粒子束 21 0053]
[22]	Lamy F, Vosion Y, Diou A, Martin M, Jeannot L, Pascal G, Hermerel C 2005 Fusion Sci. Technol. 48 1307
[23]	Gillot F, Choux A, Jeannot L, Pascal G, Baclet P 2006 Fusion Sci. Technol. 49 626
[24]	Liu Y Q, Zhao X S, Lei H L, Xie D, Gao D Z 2010 High Power Laser and Particle Beams 22 0012 (in Chinese) [刘元琼, 赵学森, 雷海乐, 谢端, 高党忠 2010 强激光与粒子束 22 0012]

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