Surface impedance and skin depth for transverse waves in bi-kappa distributed plasma.

Abstract

The skin depth has been calculated using the surface impedance for the transverse waves in bi-kappa distributed plasma. The effects of temperature anisotropy on the surface impedance and the skin depth have been studied using the kinetic model for an electromagnetic wave striking on a plasma surface. It is noted that the real part of the surface impedance has direct relation with temperature anisotropy and kappa parameter, while changes inversely with the wave frequency. On the other hand the imaginary part, however, is not affected by kappa parameter and temperature anisotropy significantly but changes directly with the frequency. It also been calculated that the skin depth is inversely related to the frequency in both resonant and non-resonant case. It has been found that in low frequency regime (resonant case) the skin depth first increases with increasing temperature anisotropy and then remains constant, while in high frequency regime (non -resonant) the skin depth increases linearly by increasing the temperature anisotropy. It has been calculated that the skin depth in both high and low frequency regime increases by increasing the kappa parameter. The comparison between the skin depth at high and low frequency shows that skin depth is greater in low frequency regime/resonant case.