2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/86796The motion of ions in the fields B = B_0 zhat and E = E_0 yhat cos(k_perp y - omega t) is considered. When omega >> Omega_i and v_perp > omega/k_perp, the equations of motion may be reduced to a set of difference equations. These equations exhibit stochastic behavior when E_0 exceeds a threshold. The diffusion coefficient above the threshold is determined. Far above the threshold, ion Landau damping is recovered. Extension of the method to include parallel propagation is outlined.Plain TeX, 11 pages, 5 figures. In "Intrinsic Stochasticity in Plasmas", edited by G. Laval and D. Gresillon (Editions de Physique Courtaboeuf, Orsay, 1979), pp. 159-168. Proc. Workshop on Intrinsic Stochasticity in Plasmas, Cargese, Corsica, June 18-23, 1979Plasma PhysicsChaotic Dynamicstext