End-on x-ray backlighting experiments for axial diagnostics of wire-array Z-pinch plasma on PPG-1 |
| |
Institution: | 1. Department of Electrical Engineering, Tsinghua University, Beijing 100084, China;
2. Shenzhen Institutes of Advanced Technology, Chinese Academy of Sciences, Shenzhen 518055, China |
| |
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. |
| |
Keywords: | X-pinches axial backlighting wire-array Z-pinches |
本文献已被 CNKI 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 |
|