The 2- to 12-min quasi-periodic variation of 50- to 1000-keV trapped electron fluxes
| Autor: | John R. Winckler, Chin Shun Lin, George K. Parks |
|---|---|
| Rok vydání: | 1976 |
| Předmět: |
Physics
Atmospheric Science Range (particle radiation) Electron spectrometer Ecology Paleontology Soil Science Magnetosphere Forestry Electron Aquatic Science Oceanography Magnetic field Geophysics Earth's magnetic field Space and Planetary Science Geochemistry and Petrology Earth and Planetary Sciences (miscellaneous) Pitch angle Atomic physics Adiabatic process Earth-Surface Processes Water Science and Technology |
| Zdroj: | Journal of Geophysical Research. 81:4517-4523 |
| ISSN: | 0148-0227 |
| DOI: | 10.1029/ja081i025p04517 |
| Popis: | It was previously shown that trapped electron fluxes of energies in the range from 50 keV to 1 MeV observed in the afternoon magnetosphere during substorms frequently undergo periodic variations. High-resolution electron spectrometer data indicate that these electron variations are periodic in the range of about 2-12 min, correlated with magnetic field variations, organized by the local magnetic field, and dependent on pitch angle. The observations suggest that the electron variations are adiabatic. The study derives quantitative adiabatic expressions of particle flux variations in a model geomagnetic field perturbation to show that the observational features are consistent with effects arising from adiabatic modulation of trapped particle fluxes. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Plný text