- Damping and dispersion of oscillating modes of a multicomponent ionic mixture in a magnetic field
- Physica A : Statistical Mechanics and its Applications
- Volume | Issue number
- 371 | 2
- Pages (from-to)
- Number of pages
- Document type
- Faculty of Science (FNWI)
- Institute for Theoretical Physics Amsterdam (ITFA)
The collective-mode spectrum of a multicomponent magnetized ionic mixture for small wave number $k$ is studied with the use of magnetohydrodynamics and formal kinetic theory. Apart from the usual thermal and diffusive modes, the spectrum contains a set of four oscillating modes. By evaluating the
k^2 contributions to the eigenfrequencies, the damping and the dispersion of these oscillating modes are determined. The long-range nature of the Coulomb interactions is shown to imply that Burnett terms with higher-order gradients in the linear phenomenological laws have to be taken into account in order to obtain a full description of all damping and dispersion effects.
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