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Title: A clean radiation environment for opacity measurements of radiatively heated material

Abstract

A clean x-ray radiation environment is essential for detailed measurements of the opacity of high-temperature radiatively heated material. A lot of laser energy is usually needed to heat a large hohlraum to produce such a clean x-ray radiation environment. A type of target is proposed that uses low-density, low-Z foam to provide a passage to radiation while isolating the sample from the disturbance from laser produced, high-temperature, high-Z plasma and heating by reflected laser light. With a smaller hohlraum, less laser energy is needed to produce high-temperature x-ray radiation for sample heating. Experiments have been done to check the proposal. The recorded clean Al self-emission spectra proved there was no gold plasma in the view-way to disturb the measurement. This type of hohlraum can provide a high-quality work-table for opacity measurement even in a relatively small laser facility.

Authors:
; ; ; ; ; ; ;  [1];  [2];  [2];  [2];  [2]
  1. Institute of Applied Physics and Computational Mathematics, Beijing 100088 (China)
  2. (China)
Publication Date:
OSTI Identifier:
20974993
Resource Type:
Journal Article
Resource Relation:
Journal Name: Physics of Plasmas; Journal Volume: 14; Journal Issue: 5; Other Information: DOI: 10.1063/1.2727472; (c) 2007 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY; ALUMINIUM; DENSITY; DISTURBANCES; ELECTRON TEMPERATURE; EMISSION SPECTRA; FOAMS; HEAT; ION TEMPERATURE; LASERS; OPACITY; PLASMA; PLASMA DIAGNOSTICS; PLASMA HEATING; TEMPERATURE RANGE 0400-1000 K; X RADIATION; X-RAY SOURCES

Citation Formats

Xu Yan, Zhang Jinyan, Yang Jiamin, Pei Wenbing, Ding Yongkun, Lai Donxian, Men Guangwei, Luo Zheng, Research Center of Laser Fusion, China Academy of Engineering Physics, Mianyang 621900, Institute of Applied Physics and Computational Mathematics, Beijing 100088, Research Center of Laser Fusion, China Academy of Engineering Physics, Mianyang 621900, and Institute of Applied Physics and Computational Mathematics, Beijing 100088. A clean radiation environment for opacity measurements of radiatively heated material. United States: N. p., 2007. Web. doi:10.1063/1.2727472.
Xu Yan, Zhang Jinyan, Yang Jiamin, Pei Wenbing, Ding Yongkun, Lai Donxian, Men Guangwei, Luo Zheng, Research Center of Laser Fusion, China Academy of Engineering Physics, Mianyang 621900, Institute of Applied Physics and Computational Mathematics, Beijing 100088, Research Center of Laser Fusion, China Academy of Engineering Physics, Mianyang 621900, & Institute of Applied Physics and Computational Mathematics, Beijing 100088. A clean radiation environment for opacity measurements of radiatively heated material. United States. doi:10.1063/1.2727472.
Xu Yan, Zhang Jinyan, Yang Jiamin, Pei Wenbing, Ding Yongkun, Lai Donxian, Men Guangwei, Luo Zheng, Research Center of Laser Fusion, China Academy of Engineering Physics, Mianyang 621900, Institute of Applied Physics and Computational Mathematics, Beijing 100088, Research Center of Laser Fusion, China Academy of Engineering Physics, Mianyang 621900, and Institute of Applied Physics and Computational Mathematics, Beijing 100088. Tue . "A clean radiation environment for opacity measurements of radiatively heated material". United States. doi:10.1063/1.2727472.
@article{osti_20974993,
title = {A clean radiation environment for opacity measurements of radiatively heated material},
author = {Xu Yan and Zhang Jinyan and Yang Jiamin and Pei Wenbing and Ding Yongkun and Lai Donxian and Men Guangwei and Luo Zheng and Research Center of Laser Fusion, China Academy of Engineering Physics, Mianyang 621900 and Institute of Applied Physics and Computational Mathematics, Beijing 100088 and Research Center of Laser Fusion, China Academy of Engineering Physics, Mianyang 621900 and Institute of Applied Physics and Computational Mathematics, Beijing 100088},
abstractNote = {A clean x-ray radiation environment is essential for detailed measurements of the opacity of high-temperature radiatively heated material. A lot of laser energy is usually needed to heat a large hohlraum to produce such a clean x-ray radiation environment. A type of target is proposed that uses low-density, low-Z foam to provide a passage to radiation while isolating the sample from the disturbance from laser produced, high-temperature, high-Z plasma and heating by reflected laser light. With a smaller hohlraum, less laser energy is needed to produce high-temperature x-ray radiation for sample heating. Experiments have been done to check the proposal. The recorded clean Al self-emission spectra proved there was no gold plasma in the view-way to disturb the measurement. This type of hohlraum can provide a high-quality work-table for opacity measurement even in a relatively small laser facility.},
doi = {10.1063/1.2727472},
journal = {Physics of Plasmas},
number = 5,
volume = 14,
place = {United States},
year = {Tue May 15 00:00:00 EDT 2007},
month = {Tue May 15 00:00:00 EDT 2007}
}