Abstract A two-dimensional, three-temperature radiation magneto-hydrodynamics model is applied to the investigation of evolutional trends in x-ray radiation power, energy, peak plasma temperature and density as functions of drive current rise-time and initial load density distribution by using the typical experimental parameters of tungsten wire-array Z-pinch on the Qiangguang-I generator. The numerical results show that as the drive current rise-time is shortened, x-ray radiation peak power, energy, peak plasma density and peak ion temperature increase approximately linearly, but among them the x-ray radiation peak power increases more quickly. As the initial plasma density distribution in the radial direction becomes gradually flattened, the peak radiation power and the peak ion-temperature almost exponentially increase, while the radiation energy and the peak plasma density change only a little. The main effect of shortening drive current rise-time is to enhance compression of plasma, and the effect of flattening initial load density distribution in the radial direction is to raise the plasma temperature. Both of the approaches elevate the x-ray peak radiation power.
Received: 26 October 2004
Revised: 26 November 2004
Accepted manuscript online:
Fund: Project supported by the National Natural Science Foundation of China (Grant No 10035020).
Cite this article:
Duan Yao-Yong (段耀勇), Guo Yong-Hui (郭永辉), Wang Wen-Sheng (王文生), Qiu Ai-Ci (邱爱慈) Effects of drive current rise-time and initial load density distribution on Z-pinch characteristics 2005 Chinese Physics 14 1856
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