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Branches of electrostatic turbulence inside solitary plasma structures in the auroral ionosphereстатья
Статья опубликована в высокорейтинговом журнале
Статья опубликована в журнале из списка Web of Science и/или Scopus- Авторы: Golovchanskaya I.V., Kozelov B.V., Chernyshov A.A., Mogilevsky M.M., Ilyasov A.A.
- Журнал: Physics of Plasmas
- Том: 21
- Номер: 8
- Год издания: 2014
- Издательство: AIP Publishing
- Местоположение издательства: United States
- DOI: 10.1063/1.4891668
- Аннотация: The excitation of electrostatic turbulence inside space-observed solitary structures is a central topic of this exposition. Three representative solitary structures observed in the topside auroral ionosphere as large-amplitude nonlinear signatures in the electric field and magnetic-field-aligned current on the transverse scales of similar to 10(2)-10(3) m are evaluated by the theories of electrostatic wave generation in inhomogeneous background configurations. A quantitative analysis shows that the structures are, in general, effective in destabilizing the inhomogeneous energy-density-driven (IEDD) waves, as well as of the ion acoustic waves modified by a shear in the parallel drift of ions. It is demonstrated that the dominating branch of the electrostatic turbulence is determined by the interplay of various driving sources inside a particular solitary structure. The sources do not generally act in unison, so that their common effect may be inhibiting for excitation of electrostatic waves of a certain type. In the presence of large magnetic-field-aligned current, which is not correlated to the inhomogeneous electric field inside the structure, the ion-acoustic branch becomes dominating. In other cases, the IEDD instability is more central.
- Добавил в систему: Козелов Борис Владимирович