中国物理B ›› 2004, Vol. 13 ›› Issue (6): 891-897.doi: 10.1088/1009-1963/13/6/019

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Emission spectra simulation of calcium plasmas in non-local thermodynamic equilibrium

梁贵云, 边霞, 赵刚   

  1. National Astronomical Observatories, Chinese Academy of Sciences, Beijing 100012, China
  • 收稿日期:2003-08-19 修回日期:2004-01-07 出版日期:2004-07-05 发布日期:2005-07-05
  • 基金资助:
    Project supported by the Special Foundation for State Major Basic Research Programme of China (Grant No G1999075406) and the National Natural Science Foundation of China (Grant No 10373014).

Emission spectra simulation of calcium plasmas in non-local thermodynamic equilibrium

Liang Gui-Yun (梁贵云), Bian Xia (边霞), Zhao Gang (赵刚)   

  1. National Astronomical Observatories, Chinese Academy of Sciences, Beijing 100012, China
  • Received:2003-08-19 Revised:2004-01-07 Online:2004-07-05 Published:2005-07-05
  • Supported by:
    Project supported by the Special Foundation for State Major Basic Research Programme of China (Grant No G1999075406) and the National Natural Science Foundation of China (Grant No 10373014).

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摘要： We use previous high-quality experimental spectra to test the accuracy of atomic data and the validity of the collisional－radiative (CR) model used in this paper. The synthetic spectrum with electron temperature log T_e(K)=6.745 and electron density n_e=6.0×10^{13}cm^{-3}, which almost reproduces the experimental spectra, is presented. Nearly all the features of the experimental spectra were identified. The results of the CR modelling for the emission spectra of calcium plasmas all agree well with the measured spectral line intensities within the experimental error for most of the lines. Furthermore, we make the electron temperature diagnostic through the synthetic spectrum and population fractions of every ionization state as a function of charge state at different electron temperatures, as well as the electron density diagnostic through the intensity ratios of two lines of Be-like calcium and three lines of C-like calcium. A good agreement between the calculated values and the measured ones is found.

关键词: atomic process, plasma, electron temperature and density diagnostic, spectra

Abstract: We use previous high-quality experimental spectra to test the accuracy of atomic data and the validity of the collisional－radiative (CR) model used in this paper. The synthetic spectrum with electron temperature log$T_{\rm e}$(K)=6.745 and electron density $n_{\rm e}=6.0\times 10^{13}$cm$^{-3}$, which almost reproduces the experimental spectra, is presented. Nearly all the features of the experimental spectra were identified. The results of the CR modelling for the emission spectra of calcium plasmas all agree well with the measured spectral line intensities within the experimental error for most of the lines. Furthermore, we make the electron temperature diagnostic through the synthetic spectrum and population fractions of every ionization state as a function of charge state at different electron temperatures, as well as the electron density diagnostic through the intensity ratios of two lines of Be-like calcium and three lines of C-like calcium. A good agreement between the calculated values and the measured ones is found.

Key words: atomic process, plasma, electron temperature and density diagnostic, spectra

中图分类号:  (Atomic, molecular, ion, and heavy-particle collisions)

  • 52.20.Hv
52.65.-y (Plasma simulation) 52.25.Jm (Ionization of plasmas) 52.25.Tx (Emission, absorption, and scattering of particles) 52.25.Kn (Thermodynamics of plasmas)