Recent progress in the theoretical understanding of relativistic electron scattering and precipitation by electromagnetic ion cyclotron waves in the Earth’s inner magnetosphere
The Earth’s outer radiation belt has long received considerable attention mainly because the MeV electron flux in the belt varies often dramatically and at various time scales. It is now widely accepted that the wave-particle interaction is one of the major mechanisms responsible for such flux varia...
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| Format: | Article |
| Language: | English |
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The Korean Space Science Society
2019-06-01
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| Series: | Journal of Astronomy and Space Sciences |
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| Online Access: | https://doi.org/10.5140/JASS.2019.36.2.45 |
| _version_ | 1797368701029187584 |
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| author | Dae-Young Lee |
| author_facet | Dae-Young Lee |
| author_sort | Dae-Young Lee |
| collection | DOAJ |
| description | The Earth’s outer radiation belt has long received considerable attention mainly because the MeV electron flux in the belt varies often dramatically and at various time scales. It is now widely accepted that the wave-particle interaction is one of the major mechanisms responsible for such flux variations. The wave-particle interaction can accelerate electrons to MeV energies, explaining the observed flux increase events, and can also scatter the electrons’ motion into the loss cone, resulting in atmospheric precipitation and thus contributing to flux dropouts. In this paper, we provide a review of the current state of research on relativistic electron scattering and precipitation due to the interaction with electromagnetic ion cyclotron (EMIC) waves in the inner magnetosphere. The review is intended to cover progress made over the last ~15 years in the theory and simulations of various issues, including quasilinear resonance diffusion, nonlinear interactions, nonresonant interactions, effects of finite normal angle on pitch angle scattering, effects due to rising tone emission, and ways to scatter near-equatorial pitch angle electrons. The review concludes with suggestions of a few promising topics for future research. |
| first_indexed | 2024-03-08T17:36:23Z |
| format | Article |
| id | doaj.art-ed02ae7c488d42878470d1bd1d0d66ff |
| institution | Directory Open Access Journal |
| issn | 2093-5587 2093-1409 |
| language | English |
| last_indexed | 2024-03-08T17:36:23Z |
| publishDate | 2019-06-01 |
| publisher | The Korean Space Science Society |
| record_format | Article |
| series | Journal of Astronomy and Space Sciences |
| spelling | doaj.art-ed02ae7c488d42878470d1bd1d0d66ff2024-01-02T12:49:24ZengThe Korean Space Science SocietyJournal of Astronomy and Space Sciences2093-55872093-14092019-06-01362456010.5140/JASS.2019.36.2.45Recent progress in the theoretical understanding of relativistic electron scattering and precipitation by electromagnetic ion cyclotron waves in the Earth’s inner magnetosphereDae-Young Lee0Department of Astronomy and Space Science, Chungbuk National University, Cheongju 28644, KoreaThe Earth’s outer radiation belt has long received considerable attention mainly because the MeV electron flux in the belt varies often dramatically and at various time scales. It is now widely accepted that the wave-particle interaction is one of the major mechanisms responsible for such flux variations. The wave-particle interaction can accelerate electrons to MeV energies, explaining the observed flux increase events, and can also scatter the electrons’ motion into the loss cone, resulting in atmospheric precipitation and thus contributing to flux dropouts. In this paper, we provide a review of the current state of research on relativistic electron scattering and precipitation due to the interaction with electromagnetic ion cyclotron (EMIC) waves in the inner magnetosphere. The review is intended to cover progress made over the last ~15 years in the theory and simulations of various issues, including quasilinear resonance diffusion, nonlinear interactions, nonresonant interactions, effects of finite normal angle on pitch angle scattering, effects due to rising tone emission, and ways to scatter near-equatorial pitch angle electrons. The review concludes with suggestions of a few promising topics for future research.https://doi.org/10.5140/JASS.2019.36.2.45electron precipitationEMIC waveradiation belt |
| spellingShingle | Dae-Young Lee Recent progress in the theoretical understanding of relativistic electron scattering and precipitation by electromagnetic ion cyclotron waves in the Earth’s inner magnetosphere Journal of Astronomy and Space Sciences electron precipitation EMIC wave radiation belt |
| title | Recent progress in the theoretical understanding of relativistic electron scattering and precipitation by electromagnetic ion cyclotron waves in the Earth’s inner magnetosphere |
| title_full | Recent progress in the theoretical understanding of relativistic electron scattering and precipitation by electromagnetic ion cyclotron waves in the Earth’s inner magnetosphere |
| title_fullStr | Recent progress in the theoretical understanding of relativistic electron scattering and precipitation by electromagnetic ion cyclotron waves in the Earth’s inner magnetosphere |
| title_full_unstemmed | Recent progress in the theoretical understanding of relativistic electron scattering and precipitation by electromagnetic ion cyclotron waves in the Earth’s inner magnetosphere |
| title_short | Recent progress in the theoretical understanding of relativistic electron scattering and precipitation by electromagnetic ion cyclotron waves in the Earth’s inner magnetosphere |
| title_sort | recent progress in the theoretical understanding of relativistic electron scattering and precipitation by electromagnetic ion cyclotron waves in the earth s inner magnetosphere |
| topic | electron precipitation EMIC wave radiation belt |
| url | https://doi.org/10.5140/JASS.2019.36.2.45 |
| work_keys_str_mv | AT daeyounglee recentprogressinthetheoreticalunderstandingofrelativisticelectronscatteringandprecipitationbyelectromagneticioncyclotronwavesintheearthsinnermagnetosphere |