| PHYSICS OF GASES, PLASMAS, AND ELECTRIC DISCHARGES |
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End-on x-ray backlighting experiments for axial diagnostics of wire-array Z-pinch plasma on PPG-1 |
| Shen Zhao(赵屾)1,2, Xinlei Zhu(朱鑫磊)1, Huantong Shi(石桓通)1, Xiaobing Zou(邹晓兵)1, Xinxin Wang(王新新)1 |
1. Department of Electrical Engineering, Tsinghua University, Beijing 100084, China;
2. Shenzhen Institutes of Advanced Technology, Chinese Academy of Sciences, Shenzhen 518055, China |
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Abstract An X-pinch axial backlighting system has been designed to quantitatively measure the density distribution of wire-array Z-pinch plasmas. End-on backlighting experiments were carried out on a 200 kA, 100 ns pulsed-power generator (PPG-1) at the Tsinghua University. Compared with side-on backlighting, end-on measurements provide an axial view of the evolution of Z-pinch plasmas. Early stages of 2-, 4-, and 8-wire Z-pinch plasmas were observed via point-projection backlighting radiography with a relatively high success rate. The density distribution of Z-pinch plasma on the r-θ plane was obtained directly from the images with the help of step wedges, and the inward radial velocity was calculated. The ablation rates obtained by X-pinch backlighting experiments are compared in detail with those calculated by the rocket model and the results show consistency.
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Received: 25 August 2016
Revised: 02 October 2016
Accepted manuscript online:
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PACS:
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52.58.Lq
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(Z-pinches, plasma focus, and other pinch devices)
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52.59.Qy
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(Wire array Z-pinches)
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| Fund: Project supported by the National Natural Science Foundation of China (Grant Nos. 11177086 and 51177086), Guangdong Innovative Research Team Program of China (Grant No. 2011S013), the National Key Research and Develop Program of China (Grant No. 2016YFC0105102), the National Basic Research Program of China (Grant Nos. 2012AA02A604 and 2015AA043203), and Beijing Center for Mathematics and Information Interdisciplinary Sciences, China. |
Corresponding Authors:
Xinxin Wang
E-mail: wangxx@tsinghua.edu.cn
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Cite this article:
Shen Zhao(赵屾), Xinlei Zhu(朱鑫磊), Huantong Shi(石桓通), Xiaobing Zou(邹晓兵), Xinxin Wang(王新新) End-on x-ray backlighting experiments for axial diagnostics of wire-array Z-pinch plasma on PPG-1 2017 Chin. Phys. B 26 015206
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