Line profile modeling for non-LTE partially ionized plasmas based on average atom model with l-splitting

Takeshi Nishikawa, H. Takabe, K. Mima

Research output: Contribution to journalArticle

9 Citations (Scopus)

Abstract

We have developed a new opacity modeling of partially ionized high-Z plasma to solve radiation transport in fluid codes. The average atom model is used to describe the electronic state of the plasma. The electronic state of the plasma is determined by solving the collisional radiative equilibrium model. We have taken into account the electron energy level splitting owing to the difference in the azimuthal quantum number. To model the line groups made of the same electronic transitions from ions indifferent charge states, we used a statistical method and calculated the distribution of the charge states from the averaged electron population in each bound state. By using the new opacity model, we can well reproduce the X-ray spectra from the plasmas. It is found that the Δn = 0 transition can explain the peaked spectra near hv = 300 eV and l-splitted emission of the n = 5-4 transition can explain the flat spectra in the region of hv = 400-800 eV seen in the experiments.

Original languageEnglish
Pages (from-to)81-87
Number of pages7
JournalLaser and Particle Beams
Volume11
Issue number1
Publication statusPublished - 1993
Externally publishedYes

Fingerprint

Plasmas
Atoms
Opacity
Electronic states
profiles
opacity
atoms
electronics
radiation transport
ion charge
Electron energy levels
quantum numbers
Statistical methods
energy levels
electron energy
Radiation
X rays
Fluids
Electrons
fluids

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)
  • Surfaces and Interfaces

Cite this

Line profile modeling for non-LTE partially ionized plasmas based on average atom model with l-splitting. / Nishikawa, Takeshi; Takabe, H.; Mima, K.

In: Laser and Particle Beams, Vol. 11, No. 1, 1993, p. 81-87.

Research output: Contribution to journalArticle

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