Simulation of the stationary particle distribution in axial channeling

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Abstract
A knowledge of the distribution function which depends in most cases on the three-dimensional coordinates, momentum and time, is needed to study the processes associated with the passage of particles through matter. In channeling, particle motion in the plane perpendicular to a string may be treated as independent of longitudinal motion. In this case, the distribution function depends upon the two-dimensional coordinates, momentum and time which can be unambiguously compared with depth providing the straggling is ignored.