Laboratory observation of a nonlinear interaction between shear Alfvén waves

Details Laboratory observation of a nonlinear interaction between shear Alfvén waves Laboratory observation of a nonlinear interaction between shear Alfvén waves

2005-09-22

arxiv.org/abs/physics/0509180v1

Physics

Plasma Physics

10 pages, 4 figures, submitted to Phys. Rev. Lett

Scientific paper

10.1103/PhysRevLett.96.155001

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 low frequency nonlinear psuedo-mode at the beat frequency. The psuedo-mode 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 psuedo-mode comparable to the normalized magnetic field amplitude ($\delta B/B$) of the interacting Alfv\'{e}n waves.

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