Electromagnetic ion cyclotron waves in the plasma depletion layer
| Autor: | Richard Denton, Mary K. Hudson, Brian J. Anderson, Stephen A. Fuselier |
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| Rok vydání: | 1993 |
| Předmět: |
Shock wave
Atmospheric Science Cyclotron Soil Science Aquatic Science Oceanography Electromagnetic radiation law.invention Ion Physics::Plasma Physics Geochemistry and Petrology law Earth and Planetary Sciences (miscellaneous) Anisotropy Earth-Surface Processes Water Science and Technology Physics Ecology Paleontology Forestry Plasma Polarization (waves) Geophysics Space and Planetary Science Physics::Space Physics Atomic physics Ion cyclotron resonance |
| Zdroj: | Journal of Geophysical Research: Space Physics. 98:13477-13490 |
| ISSN: | 0148-0227 |
| Popis: | Results of a study of the theoretical properties of electromagnetic ion cyclotron (EMIC) waves which occur in the plasma depletion layer are presented. The analysis assumes a homogeneous plasma with the characteristics which were measured by the AMPTE/CCE satellite at 1450-1501 UT on October 5, 1984. Waves were observed in the Pc 1 frequency range below the hydrogen gyrofrequency, and these waves are identified as EMIC waves. The higher-frequency instability is driven by the temperature anisotropy of the H(+) ions, while the lower-frequency instability is driven by the temperature anisotropy of the He(2+) ions. It is argued that the higher-frequency waves will have k roughly parallel to B(0) and will be left-hand polarized, while the lower frequency wave band will have k oblique to B(0) and will be linearly polarized, in agreement with observations. |
| Databáze: | OpenAIRE |
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