Beat-wave resonant down scattering of diocotron and Kelvin modes.
A theory is presented of beat-wave resonant down scattering of two-dimensional diocotron (or Kelvin) modes, in which modes down scatter to lower azimuthal mode number. The phenomenon is a fluid analogue to nonlinear Landau damping. The principal new result is a quantitative prediction of the scattering rate. The predicted rates and scalings are close to those observed in experiments with magnetized electron columns.
Mattor
Nathan
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Department of Physics & Astronomy, University of Delaware, Newark, Delaware 19716, USA.
Chang
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Mitchell
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