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Title: The importance of the transmission flux in evaluating the preheat effect in x-ray driven ablation

Abstract

In x-ray driven ablation, the preheat effect is caused by the high energy x-rays that pass through the ablator. Thus, the transmission flux can be used to characterize preheat effect in a certain degree. With the radiation temperature being 200 eV, the transmission flux and preheat temperature of pure polymer (CH) have been studied by using the one-dimensional multi-group radiation hydrodynamic code MULTI-1D. By studying the spectrum of the transmitted x-rays, it is found that the energy of the transmitted x-rays is in the range of 2–5 keV for pure CH ablator. This is of importance for selecting a dopant for CH ablator. We also calculated both the preheat temperature of CH near the surface of thick target (47.66 μm) and the transmission flux of a thinner target (38.66 μm). It is found that the more transmission flux leads to the higher preheat temperature. Preheat effect of graded Si-doped CH targets with different doped concentrations has also been studied. The results are consistent with this phenomenon. By analyzing the relationship between the transmission flux and the preheat temperature, we have presented a novel method to evaluate preheat effect in x-ray driven ablation.

Authors:
; ; ; ; ; ;  [1];  [1];  [2]
  1. Research Center of Laser Fusion, China Academy of Engineering Physics, Mianyang 621900 (China)
  2. (China)
Publication Date:
OSTI Identifier:
22408118
Resource Type:
Journal Article
Resource Relation:
Journal Name: Physics of Plasmas; Journal Volume: 22; Journal Issue: 2; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; 70 PLASMA PHYSICS AND FUSION TECHNOLOGY; ABLATION; CONCENTRATION RATIO; DOPED MATERIALS; EV RANGE; HYDRODYNAMIC MODEL; KEV RANGE; ONE-DIMENSIONAL CALCULATIONS; POLYMERS; SPECTRA; X RADIATION

Citation Formats

Li, Liling, Zhang, Lu, Zheng, Jianhua, Qing, Bo, Zhang, Jiyan, Kuang, Longyu, Li, Hang, Jiang, Shaoen, E-mail: jiangshn@vip.sina.com, and Center for Applied Physics and Technology, Peking University, Bejing 100871. The importance of the transmission flux in evaluating the preheat effect in x-ray driven ablation. United States: N. p., 2015. Web. doi:10.1063/1.4907243.
Li, Liling, Zhang, Lu, Zheng, Jianhua, Qing, Bo, Zhang, Jiyan, Kuang, Longyu, Li, Hang, Jiang, Shaoen, E-mail: jiangshn@vip.sina.com, & Center for Applied Physics and Technology, Peking University, Bejing 100871. The importance of the transmission flux in evaluating the preheat effect in x-ray driven ablation. United States. doi:10.1063/1.4907243.
Li, Liling, Zhang, Lu, Zheng, Jianhua, Qing, Bo, Zhang, Jiyan, Kuang, Longyu, Li, Hang, Jiang, Shaoen, E-mail: jiangshn@vip.sina.com, and Center for Applied Physics and Technology, Peking University, Bejing 100871. Sun . "The importance of the transmission flux in evaluating the preheat effect in x-ray driven ablation". United States. doi:10.1063/1.4907243.
@article{osti_22408118,
title = {The importance of the transmission flux in evaluating the preheat effect in x-ray driven ablation},
author = {Li, Liling and Zhang, Lu and Zheng, Jianhua and Qing, Bo and Zhang, Jiyan and Kuang, Longyu and Li, Hang and Jiang, Shaoen, E-mail: jiangshn@vip.sina.com and Center for Applied Physics and Technology, Peking University, Bejing 100871},
abstractNote = {In x-ray driven ablation, the preheat effect is caused by the high energy x-rays that pass through the ablator. Thus, the transmission flux can be used to characterize preheat effect in a certain degree. With the radiation temperature being 200 eV, the transmission flux and preheat temperature of pure polymer (CH) have been studied by using the one-dimensional multi-group radiation hydrodynamic code MULTI-1D. By studying the spectrum of the transmitted x-rays, it is found that the energy of the transmitted x-rays is in the range of 2–5 keV for pure CH ablator. This is of importance for selecting a dopant for CH ablator. We also calculated both the preheat temperature of CH near the surface of thick target (47.66 μm) and the transmission flux of a thinner target (38.66 μm). It is found that the more transmission flux leads to the higher preheat temperature. Preheat effect of graded Si-doped CH targets with different doped concentrations has also been studied. The results are consistent with this phenomenon. By analyzing the relationship between the transmission flux and the preheat temperature, we have presented a novel method to evaluate preheat effect in x-ray driven ablation.},
doi = {10.1063/1.4907243},
journal = {Physics of Plasmas},
number = 2,
volume = 22,
place = {United States},
year = {Sun Feb 15 00:00:00 EST 2015},
month = {Sun Feb 15 00:00:00 EST 2015}
}