Radiation characteristics and implosion dynamics of tungsten wire array Z-pinches on the YANG accelerator |
| |
| Authors: | 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 Wang Gui-Lin |
| |
| Affiliation: | Institute of Fluid Physics, China Academy of Engineering Physics, Mianyang 621900, China |
| |
| 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. |
| |
| Keywords: | Z-pinch tungsten wire array X-ray radiation implosion dynamics |
| 本文献已被 CNKI 维普 等数据库收录！ |
| 点击此处可从《中国物理 B》浏览原始摘要信息 |
|
点击此处可从《中国物理 B》下载免费的PDF全文 |
