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Updated: Aug 9, 2026

Magnetically Induced Rotating Rayleigh-Taylor Instability
Published on: March 3, 2017
Finite Larmor-radius theory of magnetic island evolution
F L Waelbroeck1, J W Connor, H R Wilson
1Institute for Fusion Studies, University of Texas, Austin, Texas 78712, USA.
Abstract:
Gyrokinetic theory is used to investigate the effect of the polarization drift on magnetic island evolution. Three regimes are found. For island phase velocities between the ion- and electric-drift velocities, the polarization current is shown to be stabilizing. For phase velocities between the electric- and electron-drift velocities, the island emits drift waves. This results in a radiative drag force. For all other phase velocities the polarization current is destabilizing, in agreement with the fluid limit.
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