Characterization of a multi-keV x-ray source produced by nanosecond laser irradiation of a solid target: The influence of laser focus spot and target thickness

被引：21
|
作者：
Hu, Guang-Yue [1 ,2 ,3 ]
Zheng, Jian [2 ]
Shen, Bai-fei [1 ]
Lei, An-le [1 ]
Liu, Shen-Ye [3 ]
Zhang, Ji-Yan [3 ]
Yang, Jia-Min [3 ]
Ding, Yong-Kun [3 ]
Hu, Xin [3 ]
Huang, Yi-Xiang [3 ]
Du, Hua-Bing [3 ]
Yi, Rong-Qing [3 ]
Xu, Zhi-Zhan [1 ]
机构：
[1] Chinese Acad Sci, Shanghai Inst Opt & Fine Mech, State Key Lab High Field Laser Phys, Shanghai 201800, Peoples R China
[2] Univ Sci & Technol China, Chinese Acad Sci, Key Lab Basic Plasma Phys, Dept Modern Phys, Hefei 230026, Peoples R China
[3] CAEP, Res Ctr Laser Fus, Mianyang 621900, Peoples R China
来源：
PHYSICS OF PLASMAS | 2008年 / 15卷 / 02期
基金：
中国国家自然科学基金;
关键词：
D O I：
10.1063/1.2831034
中图分类号：
O35 [流体力学]; O53 [等离子体物理学];
学科分类号：
070204 ; 080103 ; 080704 ;
摘要：
The influence of focus spot and target thickness on multi-keV x-ray sources generated by 2 ns duration laser heated solid targets are investigated on the Shenguang II laser facility. In the case of thick-foil targets, the experimental data and theoretical analysis show that the emission volume of the x-ray sources is sensitive to the laser focus spot and proportional to the 3 power of the focus spot size. The steady x-ray flux is proportional to the 5/3 power of the focus spot size of the given laser beam in our experimental condition. In the case of thin-foil targets, experimental data show that there is an optimal foil thickness corresponding to the given laser parameters. With the given laser beam, the optimal thin-foil thickness is proportional to the -2/3 power of the focus spot size, and the optimal x-ray energy of thin foil is independent of focus spot size. (C) 2008 American Institute of Physics.
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页数：7
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