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Author Li, Yongjun ♦ Gao, Cheng ♦ Tian, Qinyun ♦ Zeng, Jiaolong ♦ Yuan, Jianmin
Source United States Department of Energy Office of Scientific and Technical Information
Content type Text
Language English
Subject Keyword PLASMA PHYSICS AND FUSION TECHNOLOGY ♦ CHARGE STATES ♦ ELECTRON TEMPERATURE ♦ ION TEMPERATURE ♦ IONIZATION ♦ K SHELL ♦ L SHELL ♦ M SHELL ♦ OPACITY ♦ PLASMA DENSITY ♦ POPULATION DENSITY ♦ SILICON OXIDES ♦ TEMPERATURE RANGE
Abstract Ionization competition arising from the electronic shell structures of various atomic species in the mixture plasmas was investigated, taking SiO{sub 2} as an example. Using a detailed-level-accounting approximation, we studied the competition effects on the charge state population distribution and spectrally resolved and Planck and Rosseland mean radiative opacities of mixture plasmas. A set of coupled equations for ionization equilibria that include all components of the mixture plasmas are solved to determine the population distributions. For a given plasma density, competition effects are found at three distinct temperature ranges, corresponding to the ionization of M-, L-, and K-shell electrons of Si. Taking the effects into account, the spectrally resolved and Planck and Rosseland mean opacities are systematically investigated over a wide range of plasma densities and temperatures. For a given mass density, the Rosseland mean decreases monotonically with plasma temperature, whereas Planck mean does not. Although the overall trend is a decrease, the Planck mean increases over a finite intermediate temperature regime. A comparison with the available experimental and theoretical results is made.
ISSN 1070664X
Educational Use Research
Learning Resource Type Article
Publisher Date 2015-11-15
Publisher Place United States
Journal Physics of Plasmas
Volume Number 22
Issue Number 11


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