A magnetohydrodynamic model of kinetic Alfv{acute e}n waves with finite ion gyroradius
- 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, Vol. 3, Issue 10; Other Information: PBD: Oct 1996
- Country of Publication:
- United States
- Language:
- English
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