Aleksenko O. Forming of RF-discharge in compact helicon hydrogen and helium ion sources with paraxial power absorption

For helicon ion sources with homogeneous axial external magnetic field, the theoretical research was carried out for the stages of appearance and development of collision resonances depending on the parameters: antenna current, number of antenna turns, location of an antenna in relation to the centre of a discharge chamber, neutral gas pressure. The theoretical research is focused on identifying the distinctive features of the paraxial resonances appearance and destruction, with the parameters of the problem and the gas type considered. For helicon ion sources with inhomogeneous external magnetic field, the feasibility of resonances is investigated in terms of the parameters: value of the external magnetic field, angle of the external magnetic field, value of the plasma density, value of the longitudinal wave number, neutral gas pressure. For helium/hydrogen plasma, with the parameters of the problem considered, the characteristic features of the paraxial power absorption resonances implementation are shown.