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dc.contributor.author | Hikishima, Mitsuru | en |
dc.contributor.author | Yagitani, S. | en |
dc.contributor.author | Omura, Y. | en |
dc.contributor.author | Nagano, I. | en |
dc.contributor.alternative | 疋島, 充 | ja |
dc.contributor.alternative | 大村, 善治 | ja |
dc.date.accessioned | 2010-01-15T07:22:35Z | - |
dc.date.available | 2010-01-15T07:22:35Z | - |
dc.date.issued | 2009 | - |
dc.identifier.issn | 01480227 | - |
dc.identifier.uri | http://hdl.handle.net/2433/91258 | - |
dc.description.abstract | Cyclotron resonant wave-particle interaction of whistler mode chorus emissions drives pitch angle scatterings of a wide range of energetic electrons in the magnetosphere. We study a coherent scattering process associated with generation of the whistler mode rising chorus emissions near the geomagnetic equator in a self-consistent electromagnetic full-particle simulation. The simulation shows that coherent whistler mode rising chorus emissions scatter energetic electrons very effectively through formation of an electromagnetic electron hole. The nonlinear interaction induces acceleration of resonant electrons trapped by the wave and deceleration of untrapped resonant electrons. When the frequency of a rising chorus element continuously increases in time from lower frequencies to higher frequencies, the parallel resonant velocity continuously decreases toward lower-velocity ranges resulting in significant scattering of resonant electrons. The lower limit of resonant parallel velocity is determined by the upper frequency limit of the rising chorus element. The unscattered electrons with low parallel velocities and the accelerated resonant electrons trapped by the wave result in the distribution clearly peaked at 90°. Successive generation of rising chorus elements can scatter resonant electrons in the same resonance velocity range. The repeated scatterings make the distribution much sharper at 90°, leading to formation of a pancake distribution function as observed in the inner magnetosphere. | en |
dc.language.iso | eng | - |
dc.publisher | American Geophysical Union (AGU) | en |
dc.rights | An edited version of this paper was published by AGU. Copyright (2009) American Geophysical Union. | en |
dc.rights | This is not the published version. Please cite only the published version. | en |
dc.rights | この論文は出版社版でありません。引用の際には出版社版をご確認ご利用ください。 | ja |
dc.title | Coherent nonlinear scattering of energetic electrons in the process of whistler mode chorus generation | en |
dc.type | journal article | - |
dc.type.niitype | Journal Article | - |
dc.identifier.jtitle | Journal of Geophysical Research A: Space Physics | en |
dc.identifier.volume | 114 | - |
dc.identifier.issue | 10 | - |
dc.relation.doi | 10.1029/2009JA014371 | - |
dc.textversion | author | - |
dc.identifier.artnum | A10205 | - |
dcterms.accessRights | open access | - |
出現コレクション: | 学術雑誌掲載論文等 |
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