Stable three-dimensional modon soliton in plasmas.
basic_science · Level V
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- Record sourced from PubMed, PMID 29346877.
- Also identified by DOI 10.1103/PhysRevE.96.032211.
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Abstract
We derive the nonlinear equations that describe coupled drift waves and ion acoustic waves in a plasma. We show that when the coupling to ion acoustic waves is negligible, the reduced nonlinear equation is a generalization of the Hasegawa-Mima equation to the three-dimensional (3D) case. We find an exact analytical solution of this equation in the form of a 3D soliton drift wave (3D modon). By numerical simulations we study collisions between the modons and show that the collisions can be fully elastic.