Generation of a sharp density increase in radiation transport between high-Z and low-Z plasmas

Meng Guangwei; Wang Jianguo; Wang Xuerong; Li Jinghong; Zhang Weiyan

doi:10.1016/j.mre.2016.09.001

Volume 1 Issue 5

Sep. 2016

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Meng Guangwei, Wang Jianguo, Wang Xuerong, Li Jinghong, Zhang Weiyan. Generation of a sharp density increase in radiation transport between high-Z and low-Z plasmas[J]. Matter and Radiation at Extremes, 2016, 1(5). doi: 10.1016/j.mre.2016.09.001

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Meng Guangwei, Wang Jianguo, Wang Xuerong, Li Jinghong, Zhang Weiyan. Generation of a sharp density increase in radiation transport between high-Z and low-Z plasmas[J]. Matter and Radiation at Extremes, 2016, 1(5). doi: 10.1016/j.mre.2016.09.001

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Generation of a sharp density increase in radiation transport between high-Z and low-Z plasmas

doi: 10.1016/j.mre.2016.09.001

1.
aInstitute of Applied Physics and Computational Mathematics, Beijing 10094, China
2.
bLaboratory of Computational Physics, Beijing 100088, China
3.
cNational Hi-Tech Inertial Confinement Fusion Committee of China, Beijing 100088, China

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Corresponding author: *Corresponding author.; **Corresponding author. E-mail addresses: wang_jianguo@iapcm.ac.cn (J.G. Wang), zw-y@vip.sina.com (W.Y. Zhang).
Received Date: 2016-04-01
Accepted Date: 2016-08-10
Publish Date: 2016-09-15

Abstract

Abstract

A sharp density increase (referred to as density incrustation) of the Au plasmas in the radiative cooling process of high-Z Au plasmas confined by low-Z CH plasmas is found through the radiative hydrodynamic simulations. The temperature of Au plasmas changes obviously in the cooling layer while the pressure remains constant. Consequently, the Au plasmas in the cooling layer are compressed, and the density incrustation is formed. It is also shown that when the high-Z plasma opacity decreases or the low-Z plasma opacity increases, the peak density of the density incrustation becomes lower and the thickness of the density incrustation becomes wider. This phenomenon is crucial to the Rayleigh–Taylor instability at the interface of high-Z and low-Z plasmas, since the density variation of Au plasmas has a considerable influence on the Atwood number of the interface.
- Density incrustation,
- Radiation hydrodynamics,
- Opacity

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References(33)

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