Laboratory observation of a nonlinear interaction between shear Alfvén waves

T. A. Carter; B. Brugman; P. Pribyl; W. Lybarger

doi:10.1103/PhysRevLett.96.155001

Laboratory observation of a nonlinear interaction between shear Alfvén waves

T. A. Carter, B. Brugman, P. Pribyl, W. Lybarger

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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 (δB/B) of the interacting Alfvén waves.

Original language	English
Article number	155001
Journal	Physical Review Letters
Volume	96
Issue number	15
DOIs	https://doi.org/10.1103/PhysRevLett.96.155001
State	Published - 2006
Externally published	Yes

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10.1103/PhysRevLett.96.155001

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title = "Laboratory observation of a nonlinear interaction between shear Alfv{\'e}n waves",

abstract = "An experimental investigation of nonlinear interactions between shear Alfv{\'e}n waves in a laboratory plasma is presented. Two Alfv{\'e}n waves, generated by a resonant cavity, are observed to beat together, driving a pseudomode at the beat frequency. The pseudomode then scatters the Alfv{\'e}n 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 (δB/B) of the interacting Alfv{\'e}n waves.",

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AU - Brugman, B.

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AB - 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 (δB/B) of the interacting Alfvén waves.

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Laboratory observation of a nonlinear interaction between shear Alfvén waves

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