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VOLUME 86 (2007) | ISSUE 10 | PAGE 725
Nonlinear theory of mirror instability near threshold
PACS: 52.25.Xz, 52.35.Py, 94.05.-a, 94.30.Cj
Abstract
An asymptotic model based on a reductive perturbative expansion of the drift kinetic and the Maxwell equations is used to demonstrate that, near the instability threshold, the nonlinear dynamics of mirror modes in a magnetized plasma with anisotropic ion temperatures involves a subcritical bifurcation, leading to the formation of small-scale structures with amplitudes comparable with the ambient magnetic field.