Approximate expression for the electric potential around an absorbing particle in isotropic collisionless plasma

摘要: A new approximate expression for the potential distribution around an absorbing particle in isotropic collisionless plasma is proposed. The given by sum of Debye-Huckel with effective screening length and far-field asymptote obtained from solution linearized Poisson equation. In contrast to analogous models, not fixed but depends on distance particle. This allows us obtain a more accurate approximation entire range distances. dependence predicted analysis charge density function. contains two adjustable parameters, which are calculated applying procedure based balance considerations. Using results, simple expressions parameters model addition, characteristic length, ...