Numerical studies of the voltage amplitude effect on plasma characteristics in atmospheric pressure driven by dual LF-RF frequency discharge

Abstract Dielectric barrier discharges (DBDs) are primarily utilized as efficient sources of large-volume diffuse plasmas. However, the synergistic interaction of certain key plasma factors limits their broader application. In the present paper, we report numerical investigations of the effects of voltage amplitude in dual-frequency excitation on atmospheric DBDs using a 50 kHz/5 MHz frequency combination. Our results indicate that varying the voltages for low frequency (LF) and radio frequency (RF) significantly influences the electron dynamics during discharge, resulting in distinct spatio-temporal distributions of electron and metastable particle densities. These findings contribute to the regulation of discharges under atmospheric pressure conditions and facilitate the attainment of non-equilibrium and nonlinear plasma parameters.