Axial distributions of plasma and floating potentials, electron number density and the electron energy distribution function (EEDF) have been measured in the double layer (DL) region of an He discharge constriction. Excitation processes in the constriction region are studied. Using a linearization method for the nonstationary balance equations and choosing appropriate discharge conditions, ...

We study electron-impact single-ionization cross-sections for all levels of the ground configuration Ar2+ ion using distorted wave approximation. investigate influences direct ionization and excitation-autoionization processes on total cross sections. used corrected energies Ar3+ so that threshold corresponds to value recommended by National Institute Standards Technology (NIST). Radiative damp...