Publications

Selected publication  

Machala Z., Janda M., Hensel K., Jedlovský I., Leštinská L., Foltin V., Martišovitš V., Morvová M.: Emission spectroscopy of atmospheric pressure plasmas for bio-medical and environmental applications, J. Molec. Spectrosc. 243 (2), 194-201 (2007).
citations: 311  

Abstract

Motivated by experimental investigations of electrical discharges in N2/CO2/H2O, Monte Carlo (MC) electron dynamics simulations in atmospheric N2/CO2 mixtures were performed. The goal was to obtain electron energy distribution functions (EEDFs), mean free path, drift
velocity, collision frequency and mean energy of electrons, rate coefficients of electron-impact reactions, ionisation and attachment coefficients, as functions of the reduced electric field strength (E/N) and of the concentration of individual gas components.

The results obtained by MC simulations were fitted with polynomials of up to the 3rd order with reasonable accuracy for E/N above 80 Td. The studied parameters below 80 Td were strongly non-linear as functions of E/N. This is mostly due to the influence of elastic collisions of electrons with CO2 molecules prevailing in CO2-dominant mixtures for E/N < 40Td, and vibrational excitation collisions of N2 species prevailing in N2-dominant mixtures for E/N from 40 to 80 Td. The effect of these electron-impact processes was specific for each of the studied parameters.