Artículos de revistas
Electrostatic instabilities triggered by finite amplitude Alfvén/ion-cyclotron waves and relative drifts among the ion components in the magnetosphere
Fecha
2008Registro en:
Journal of Geophysical Research: Space Physics, Volumen 113, Issue 10, 2018,
21699402
10.1029/2008JA013378
Autor
Gomberoff, L.
Institución
Resumen
Alfvén/ion-cyclotron waves have been observed in several regions of the magnetosphere. Parametric decays of finite amplitude Alfvén/ion- cyclotron waves in the presence of He+ ions and a mixed population of thermal and hot protons have been shown to lead to several parametric instabilities. These studies assumed that heavy ions are not drifting relative to each other. However, a relative drift velocity among the ions can affect known parametric decays and can also lead to new ones. Moreover, finite amplitude waves in a plasma system with drifting ion species are shown to destabilize nonlinear ion-acoustic-like waves supported by each species. Finally, linear ion-acoustic waves supported by different ion species can also be destabilized because of the relative drift between ion components. Copyright 2008 by the American Geophysical Union.