Abstract
Abstract A new kind of a particle simulation algorithm suitable for following long time scale evolution of electromagnetic beams in plasma is presented. The algorithm is based on particle and field equations averaged over the rapid laser oscillations and the model constitutes the electromagnetic counterpart for the Zakharov's model for electrostatics. This code can be reduced to a fully fluid code, if so desired, by replacing the electron dynamics. Computational remarks upon implementation of the algorithm are given. Test results of the code applied to the Rayleigh spread and self-focusing of an intense laser beam in a plasma are discussed.
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