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Nonlinear propagation of lower hybrid waves in a plasma

A model equation was used to investigate the competition between the electron E x B/sub o/ nonlinearities (which lead to parametric instabilities and anomalous absorption) and the electron polarization drift and ion nonlinearities (which induce filamentation and self-focusing effects) in the propagation of a large amplitude lower hybrid wave in a plasma. The conclusion is that the former dominates for plasma regions with ..omega../sup 2//sub pi/ > ..omega../sup 2//sub ci/ (i.e., everywhere except in a thin skin region).