Line-Shape Code Comparison through Modeling and Fitting of Experimental Spectra of the C ii 723-nm Line Emitted by the Ablation Cloud of a Carbon Pellet

M. Koubiti (1) , M. Goto (2) , S. Ferri (1) , S. B. Hansen (3) , E. Stambulchik (4)

1 PIIM - Physique des interactions ioniques et moléculaires
2 NIFS - National Institute for Fusion Science
3 SNL - Sandia National Laboratories [Albuquerque]
4 Weizmann Institute of Science [Rehovot, Israël]

Various codes of line-shape modeling are compared to each other through the profile of the C II 723-nm line for typical plasma conditions encountered in the ablation clouds of carbon pellets, injected in magnetic fusion devices. Calculations were performed for a single electron density of 10 17 cm −3 and two plasma temperatures (T = 2 and 4 eV). Ion and electron temperatures were assumed to be equal (T e = T i = T). The magnetic field, B, was set equal to either to zero or 4 T. Comparisons between the line-shape modeling codes and two experimental spectra of the C II 723-nm line, measured perpendicularly to the B-field in the Large Helical Device (LHD) using linear polarizers, are also discussed.

Mots clés: carbon pellet ablation; plasma spectroscopy; LHD; Stark/Zeeman broadening; line-shape codes; atomic physics

Domaines: Physique des plasmas [physics.plasm-ph]

M. Koubiti, M. Goto, S. Ferri, S. B. Hansen, E. Stambulchik. Line-Shape Code Comparison through Modeling and Fitting of Experimental Spectra of the C ii 723-nm Line Emitted by the Ablation Cloud of a Carbon Pellet. Atoms, 2014, 2, pp.319-333. ⟨10.3390/atoms2030319⟩. ⟨hal-01044851⟩