Radiation characteristics and implosion dynamics of tungsten wire array Z-pinches on the YANG accelerator

We investigated the radiation characteristics and implosion dynamics of low-wire-number cylindrical tungsten wire array Z-pinches on the YANG accelerator with a peak current 0.8-1.1 MA and a rising time ～ 90 ns.The arrays are made up of（8-32）×5 μm wires 6/10 mm in diameter and 15 mm in height.The hi...

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Published inChinese physics B Vol. 21; no. 5; pp. 410 - 417
Main Author 黄显宾 杨礼兵 李晶 周少彤 任晓东 张思群 但加坤 蔡红春 段书超 陈光华 章征伟 欧阳凯 李军 张朝辉 周荣国 王贵林
Format Journal Article
LanguageEnglish
Published 01.05.2012
Subjects
Ablation
Accelerators
Arrays
Dynamics
Implosions
Plasmas
Tungsten
Wire
X-rays
X射线辐射
Z箍缩等离子体
丝阵
内爆动力学
加速器
能量转换效率
辐射特性
钨
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ISSN1674-1056
2058-3834
1741-4199
DOI10.1088/1674-1056/21/5/055206

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Summary:We investigated the radiation characteristics and implosion dynamics of low-wire-number cylindrical tungsten wire array Z-pinches on the YANG accelerator with a peak current 0.8-1.1 MA and a rising time ～ 90 ns.The arrays are made up of（8-32）×5 μm wires 6/10 mm in diameter and 15 mm in height.The highest X-ray power obtained in the experiments was about 0.37 TW with the total radiation energy ～ 13 kJ and the energy conversion efficiency ～ 9%（24×5 μm wires,6 mm in diameter）.Most of the X-ray emissions from tungsten Z-pinch plasmas were distributed in the spectral band of 100-600 eV,peaked at 250 and 375 eV.The dominant wavelengths of the wire ablation and the magneto-Rayleigh-Taylor instability were found and analyzed through measuring the time-gated self-emission and laser interferometric images.Through analyzing the implosion trajectories obtained by an optical streak camera,the run-in velocities of the Z-pinch plasmas at the end of the implosion phase were determined to be about（1.3-2.1）×10 7 cm/s.
Bibliography:We investigated the radiation characteristics and implosion dynamics of low-wire-number cylindrical tungsten wire array Z-pinches on the YANG accelerator with a peak current 0.8-1.1 MA and a rising time ～ 90 ns.The arrays are made up of（8-32）×5 μm wires 6/10 mm in diameter and 15 mm in height.The highest X-ray power obtained in the experiments was about 0.37 TW with the total radiation energy ～ 13 kJ and the energy conversion efficiency ～ 9%（24×5 μm wires,6 mm in diameter）.Most of the X-ray emissions from tungsten Z-pinch plasmas were distributed in the spectral band of 100-600 eV,peaked at 250 and 375 eV.The dominant wavelengths of the wire ablation and the magneto-Rayleigh-Taylor instability were found and analyzed through measuring the time-gated self-emission and laser interferometric images.Through analyzing the implosion trajectories obtained by an optical streak camera,the run-in velocities of the Z-pinch plasmas at the end of the implosion phase were determined to be about（1.3-2.1）×10 7 cm/s.
11-5639/O4
Z-pinch; tungsten wire array; X-ray radiation; implosion dynamics
Huang Xian-Bin,Yang Li-Bing,Li Jing,Zhou Shao-Tong,Ren Xiao-Dong,Zhang Si-Qun,Dan Jia-Kun,Cai Hong-Chun,Duan Shu-Chao,Chen Guang-Hua,Zhang Zheng-Wei,Ouyang Kai,Li Jun,Zhang Zhao-Hui,Zhou Rong-Guo,and Wang Gui-Lin Institute of Fluid Physics,China Academy of Engineering Physics,Mianyang 621900,China
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ISSN:1674-1056
2058-3834
1741-4199
DOI:10.1088/1674-1056/21/5/055206