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

doi:10.1088/1674-1056/21/5/055206

中国物理B ›› 2012, Vol. 21 ›› Issue (5): 55206-055206.doi: 10.1088/1674-1056/21/5/055206

• PHYSICS OF GASES, PLASMAS, AND ELECTRIC DISCHARGES • 上一篇下一篇

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

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

Institute of Fluid Physics, China Academy of Engineering Physics, Mianyang 621900, China

收稿日期:2011-08-24 修回日期:2012-04-27 出版日期:2012-04-01 发布日期:2012-04-01
基金资助:
Project supported by the National Natural Science Foundation of China (Grant No. 10635050).

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

Huang Xian-Bin(黄显宾), Yang Li-Bing(杨礼兵), Li Jing(李晶), Zhou Shao-Tong(周少彤), Ren Xiao-Dong(任晓东), Zhang Si-Qun(张思群), Dan Jia-Kun(但加坤), Cai Hong-Chun(蔡红春), Duan Shu-Chao(段书超) , Chen Guang-Hua(陈光华), Zhang Zheng-Wei(章征伟), Ouyang Kai(欧阳凯), Jun Li(李军), Zhang Zhao-Hui(张朝辉)^†, Zhou Rong-Guo(周荣国), and Wang Gui-Lin(王贵林)

Institute of Fluid Physics, China Academy of Engineering Physics, Mianyang 621900, China

Received:2011-08-24 Revised:2012-04-27 Online:2012-04-01 Published:2012-04-01
Supported by:
Project supported by the National Natural Science Foundation of China (Grant No. 10635050).

摘要/Abstract

摘要： 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)× 10⁷ cm/s.

关键词: Z-pinch, tungsten wire array, X-ray radiation, implosion dynamics

Abstract: 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)× 10⁷ cm/s.

Key words: Z-pinch, tungsten wire array, X-ray radiation, implosion dynamics

中图分类号: (Plasma diagnostic techniques and instrumentation)

52.70.-m

52.30.-q (Plasma dynamics and flow) 52.59.Qy (Wire array Z-pinches)

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. Radiation characteristics and implosion dynamics of tungsten wire array Z-pinches on the YANG accelerator[J]. 中国物理B, 2012, 21(5): 55206-055206.

Huang Xian-Bin(黄显宾), Yang Li-Bing(杨礼兵), Li Jing(李晶), Zhou Shao-Tong(周少彤), Ren Xiao-Dong(任晓东), Zhang Si-Qun(张思群), Dan Jia-Kun(但加坤), Cai Hong-Chun(蔡红春), Duan Shu-Chao(段书超) , Chen Guang-Hua(陈光华), Zhang Zheng-Wei(章征伟), Ouyang Kai(欧阳凯), Jun Li(李军), Zhang Zhao-Hui(张朝辉), Zhou Rong-Guo(周荣国), and Wang Gui-Lin(王贵林) . Radiation characteristics and implosion dynamics of tungsten wire array Z-pinches on the YANG accelerator[J]. Chin. Phys. B, 2012, 21(5): 55206-055206.

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

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

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