ABSOLUTE INTENSITIES OF HELIUM LINES AND SPACE RESOLVED ELECTRON DENSITIES AND ENERGIES IN DISCHARGE WITH A HOLLOW CATHODE IN HE:H2O GAS MIXTURE

Autor: Sergey N. Andreev, Anton V. Bernatskiy, Ivan Draganov, Igor V. Kochetov, Vladimir N. Ochkin
Rok vydání: 2023
Předmět:
Zdroj: High Temperature Material Processes An International Quarterly of High-Technology Plasma Processes. 27:71-80
ISSN: 1093-3611
DOI: 10.1615/hightempmatproc.2022046504
Popis: In a discharge with a hollow cathode the electron energy distribution functions (EEDFs), electron concentration, and absolute intensities of pure helium and helium mixtures with water vapor at pressures of 2-3 mbar were measured. It was shown that under the experiment conditions, the EEDFs were significantly different from the Maxwellian function since the amount of high-energy electrons in the energy range of 7-24 eV was much larger. As the concentration of water molecules in plasma increased, the amount of high-energy electrons decreased. The absolute intensities of a number of helium lines were calculated in coronal model approximation. It was determined that the lines reasonably agreed with the experimental measurements of the absolute intensities.
Databáze: OpenAIRE