Physics – Plasma Physics
Scientific paper
Jan 1978
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1978phys...17...15y&link_type=abstract
Physica Scripta, vol. 17, Jan. 1978, p. 15-22.
Physics
Plasma Physics
13
Electromagnetic Interactions, Magnetohydrodynamic Stability, Magnetospheric Instability, Neutral Sheets, Plasma Physics, Boundary Value Problems, Drift Rate, Energy Conversion, Magnetic Field Configurations, Maxwell Equation, Vlasov Equations, Wave Equations
Scientific paper
The structure of electromagnetic perturbations in a magnetic neutral sheet is analyzed within the framework of a Vlasov-Maxwellian picture. In reference to Harris' (1962) equilibrium state, a boundary-value problem is formulated and solved to give the possible existence of a low-frequency electromagnetic wave of compressional type propagating along the electron-drift current in the sheet. The stability of this mode is critically dependent on the thickness parameter of the sheet. If the sheet is thin enough, the perturbation will grow even for equal electron and ion temperatures. The critical thicknesses are calculated with regard to various temperature ratios, and their values are found to be approximately equal to or less than 0.9 times the ion Larmor radius just outside the sheet region.
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