A fluid model with finite Larmor radius effects for mirror mode dynamics | Zendy

Passot T. | Zendy; Sulem P. L. | Zendy

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A fluid model with finite Larmor radius effects for mirror mode dynamics

Author(s) -

Passot T.,

Sulem P. L.

Publication year - 2006

Publication title -

journal of geophysical research: space physics

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 1.67

H-Index - 298

eISSN - 2156-2202

pISSN - 0148-0227

DOI - 10.1029/2005ja011425

Subject(s) - gyroradius , physics , instability , dispersion relation , landau damping , nonlinear system , radius , classical mechanics , transverse plane , gyrokinetics , mechanics , quantum electrodynamics , plasma , computational physics , optics , quantum mechanics , computer security , computer science , structural engineering , engineering , tokamak

A fluid model retaining hydrodynamic nonlinearities together with a linear approximation of the Landau damping and of the finite Larmor radius effects is constructed to describe the dynamics of quasi‐transverse low‐frequency waves in a homogeneous magnetized plasma. It accurately reproduces the kinetic theory predictions for the mirror instability, including its quenching at small transverse scales. The dispersion relation of kinetic Alfvén waves is also recovered. This model should provide an efficient tool for numerical simulations of nonlinear mirror mode dynamics, at least near threshold.

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