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This analysis uncovers symmetries in drift ion acoustic waves with and without magnetic shear, revealing important solutions.
3D model for the coupled drift and ion acoustic waves is considered. Symmetries of the model are found in the presence of the magnetic shear as well as in the shearless case. Some of the most symmetric solutions, exact and perturbative, are presented. In particular, solutions describing zonal flow generation by initially monochromatic waves are obtained.
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V. B. Taranov (2003) studied this question.
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