To the optical properties of moderately non-ideal plasma. (November 2022) - Khrapak, S.A.
Highlights: In this manuscript the optical properties of non-ideal completely ionized plasma are discussed from the perspective of the kinetic theory approach. It is demonstrated that a physically motivated modification of the Coulomb logarithm, originally proposed in the context of ion-particle scattering in dusty plasma, allows us to improve the theoretical description of the dynamical conductivity and hence of the optical properties of plasma in the moderately non-ideal regime. The obtained analytical results for the refractive index, reduced absorption and reflection coefficients can be straightforwardly implemented for practical calculations. This implementation is discussed in detail. A comparison with a method proposedx recently by Bronin et al. [JQSRT 268, 107621 (2021)] is provided. Comparison with some experimental results on the reflectivity coefficient indicates on the importance of additional factors such as the presence of the neutral component, profile of the shock wave front in shock-compressed experiments, and the level of electron degeneration. Abstract: The optical properties of non-ideal completely ionized plasma are discussed from the perspective of the kinetic theory approach. It is demonstrated that a physically motivated modification of the Coulomb logarithm, originally proposed in the context of ion-particle scattering in dusty plasma, allows us to improve the theoretical description of the dynamical conductivity and hence of the optical properties of plasma in the moderately non-ideal regime. The obtained analytical results for the refractive index, reduced absorption and reflection coefficients can be straightforwardly implemented for practical calculations. The comparison between experimental and theoretical results for the reflectivity is performed and discussed in some detail.