Carter TA, Brugman B, Pribyl P, Lybarger W. Laboratory observation of a nonlinear interaction between shear Alfvén waves.
PHYSICAL REVIEW LETTERS 2006;
96:155001. [PMID:
16712166 DOI:
10.1103/physrevlett.96.155001]
[Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/22/2005] [Indexed: 05/09/2023]
Abstract
An experimental investigation of nonlinear interactions between shear Alfvén waves in a laboratory plasma is presented. Two Alfvén waves, generated by a resonant cavity, are observed to beat together, driving a pseudomode at the beat frequency. The pseudomode then scatters the Alfvén waves, generating a series of sidebands. The observed interaction is very strong, with the normalized amplitude of the driven pseudomode comparable to the normalized magnetic field amplitude (deltaB/B) of the interacting Alfvén waves.
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