Analysis of applicability of triplet-state emission of molecular hydrogen for spectral diagnostics of a DC discharge
- Russian Academy of Sciences, Topchiev Institute of Petrochemical Synthesis (Russian Federation)
The applicability of emission of the N{sup 3}Λ{sub σ} triplet states of molecular hydrogen for spectral diagnostics of the positive column of a dc glow discharge in hydrogen at translational gas temperatures of 360–600 K, specific absorbed powers of 0.8–4.25 W/cm, gas pressures of p = 0.3–15.0 Torr, reduced fields of E/N = 30–130 Td, and electron densities of n{sub e} = 4.0 × 10{sup 9}–6.5 × 10{sup 10} cm{sup –3} is analyzed by using an advanced level-based semi-empirical collisional−radiative model. It is found that secondary processes make the main contribution to the population and decay of the N{sup 3}Λ{sub σ} = a{sup 3}Σ{sup +}{sub g}, c{sup 3}Π{sub u}, g{sup 3}Σ{sup +}{sub g}, h{sup 3}Σ{sup +}{sub g}, and i{sup 3}Π{sub g} triplet states. The dipole-allowed transitions e{sup 3}Σ{sup +}{sub g} → a{sup 3}Σ{sup +}{sub g}, f{sup 3}Σ{sup +}{sub g} → a{sup 3}Σ{sup +}{sub g}, g{sup 3}Σ{sup +}{sub g} and k{sup 3}Π{sub u} → a{sup 3}Σ{sup +}{sub g} can be used for spectral diagnostics of a dc discharge within a simplified coronal model.
- OSTI ID:
- 22760296
- Journal Information:
- Plasma Physics Reports, Vol. 43, Issue 10; Other Information: Copyright (c) 2017 Pleiades Publishing, Ltd.; Country of input: International Atomic Energy Agency (IAEA); ISSN 1063-780X
- Country of Publication:
- United States
- Language:
- English
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