Spectroscopic measurements of the electron number density, electron temperature and OH(A) rotational distribution in a liquid electrode dielectric barrier discharge

摘要: Abstract The electron temperature and number density as well the OH(A) rotational distribution of a discharge with flowing liquid electrode dielectric barrier coupling (a discharge, LE-DBD) were investigated by means optical emission spectroscopy. By using Stark broadening three Strontium lines, N e lower bound T can be simultaneously measured. values obtained  = (0.8 − 1.6) × 10 16  cm − 3  > 1.1 eV, respectively. deviates from equilibrium described superposition two Boltzmann distributions 1  = (3230 ± 90) K for K  ' ≤ 15 2  = (7300 ± 300) K  ' ≥ 16. Consideration formation mechanisms reaction rates suggests that dissociative recombination H O + 3 is responsible higher state distribution, where these ions only produced in LE-DBD through an electrospray-like process.