Modelling and Analysis of SF₆ Injection into Ionosphere

Three major stages in SF₆ injection into the ionosphere, comprising the gasification, diffusion and chemical reactions, were mathematically modeled and theoretically analyzed in thermodynamics and molecular dynamics to evaluate the effectiveness of SF₆ injection.The key variables, including the gasification rate, diffusion coefficient, molecular structure, reaction rate and enthalpy of SF₆ in the ionosphere, were calculated to deepen the understanding of the efficiency, diffusion, reaction, electron capture rate of SF₆, and formation time of ionospheric hole as well.The calculated results show that SF₆ is an ideal ionospheric modification agent because of the many advantages, including but not limited to the fast gasification rate, high utilization efficiency, small diffusion coefficient, long modification time, strong electron-capture ability, and some heat released in the electron-SF₆ reaction.