Momot A. Effective interactions and fluctuations in dusty weakly ionized plasma

Dusty weakly ionized plasma is considered in the present work. The dynamics of plasma were described on the basis of the kinetic equation with Bhatnagar-Gross-Krook (BGK) collision integral or in the case of strongly collisional plasma using the drift-diffusion approximation. On the basis of the kinetic approach, the model of point sinks is developed. The expressions for the effective potential of the charged grain are derived with allowance for the presence of an external constant magnetic or electric field. The problem of grain effective potential and interaction between two macroparticles in strongly collisional plasma is solved numerically. Within the Poisson - Boltzmann model, the potential distribution around a charged spherical particle in a nonisothermal plasma is calculated. The drag force on the grain stationary moving in a strongly collisional plasma is studied. The theory of large-scale fluctuations in plasma is generalized for the case of the presence of an external constant electric field. The dispersion equation for such a plasma is solved numerically in the frequency domain of ion-acoustic waves. The new approach to consistent kinetic description of the large-scale fluctuations in dusty plasma is formulated with regard to grain charge fluctuations due to their charging by plasma currents.