Research on parameter inversion of dusty plasma based on microwave measurement

This study establishes a microwave transmission measurement system for dusty plasma. The electron density and characteristic parameters of dust particles are inverted based on the attenuation and phase shift of microwaves passing through the dusty plasma. Using the inverted parameters, the conductivity and permittivity of the dusty plasma are calculated, and the attenuation and phase coefficients at a third frequency are further derived. A comparison between theoretical calculations and experimental measurements across multiple frequencies shows good agreement. Consequently, a parameter inversion method for dusty plasma based on phase coefficient measurements is proposed, and the validity of the conductivity and permittivity formulations for dusty plasma is confirmed.