Diagnostics of plasmas with substantial concentrations of atomic oxygen

An efficient method predicting the electron density ${\mathit{N}}_{\mathit{e}}$ and temperature ${\mathit{T}}_{\mathit{e}}$ in partially ionized plasmas with a fraction of atomic oxygen greater than about 10% of all heavy particles of the plasma is presented. The method is valid in plasmas where ${10}^{10}$ ${\mathrm{cm}}^{\mathrm{-}3}$≲${\mathit{N}}_{\mathit{t}}$≲${10}^{16}$ ${\mathrm{cm}}^{\mathrm{-}3}$ and 8000 K ≲${\mathit{T}}_{\mathit{e}}$≲15 000 K [${\mathit{N}}_{\mathit{t}}$=2(${\mathit{N}}_{\mathit{a}}$+${\mathit{N}}_{\mathit{e}}$), and ${\mathit{N}}_{\mathit{a}}$ is the density of the oxygen atoms].