A magnetohydrodynamic model of kinetic Alfv{acute e}n waves with finite ion gyroradius

Journal Article · Tue Oct 01 04:00:00 EDT 1996 · Physics of Plasmas

DOI:https://doi.org/10.1063/1.871935· OSTI ID:383802

Marchenko, V A; Denton, R E; Hudson, M K ^[1]

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1. Department of Physics and Astronomy, Dartmouth College, Hanover, New Hampshire 03755-3528 (United States)

Low-frequency magnetohydrodynamic equations including the effects of finite ion Larmor radius are derived. These equations contain all the physical terms necessary to describe kinetic Alfv{acute e}n waves. Among other applications, these waves are used to interpret ultra-low-frequency wave phenomena in the Earth{close_quote}s magnetosphere. The finite ion Larmor radius effects are usually disregarded; however, under magnetospheric conditions, the ion temperature cannot be considered negligible since {ital T}{sub {ital i}}{ge}{ital T}{sub {ital e}}. The finite ion gyroradius is accounted for by the ion stress tensor calculated in this Brief Communication. The nonlinear one-fluid system of equations is shown to adequately describe linear kinetic Alfv{acute e}n waves in a low-{beta}({beta}{lt}1) homogeneous plasma. It is demonstrated that energy of the plasma system is conserved. {copyright} {ital 1996 American Institute of Physics.}

• OSTI ID: 383802
• Journal Information: Physics of Plasmas, Journal Name: Physics of Plasmas Journal Issue: 10 Vol. 3; ISSN PHPAEN; ISSN 1070-664X
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
ALFVEN WAVES
DISTRIBUTION FUNCTIONS
EARTH MAGNETOSPHERE
HOMOGENEOUS PLASMA
ION TEMPERATURE
LARMOR RADIUS
LOW-BETA PLASMA
MAGNETOHYDRODYNAMICS