抄録
Spectroscopic measurements of the electron temperatures Te, have been made for the atmospheric argon plasmas seeded with sodium vapors at gas temperatures above 2000°C. The relationship between Te and current density j has also been obtained. The values of j calculated from the measured Te and seeding ratios agree well with the experimental values. These results indicate that an electron energy equation containing radiation loss terms is applicable to the estimation of the non-equilibrium ionization in the working plasmas for the magnetoplasmadynamic power generating systems.