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：22

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.

引用

页数：7

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