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Data‐Driven Simulation of Rapid Flux Enhancement of Energetic Electrons With an Upper‐Band Whistler Burst
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- S. Saito
- Space Environment Laboratory Applied Electromagnetic Research Institute National Institute of Information and Communications Technology Tokyo Japan
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- S. Kurita
- Research Institute for Sustainable Humanosphere Kyoto University Uji Japan
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- Y. Miyoshi
- Institute for Space‐Earth Environmental Research Nagoya University Nagoya Japan
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- S. Kasahara
- Graduate School of Science University of Tokyo Tokyo Japan
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- S. Yokota
- Graduate School of Science Osaka University Toyonaka Japan
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- K. Keika
- Graduate School of Science University of Tokyo Tokyo Japan
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- T. Hori
- Institute for Space‐Earth Environmental Research Nagoya University Nagoya Japan
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- Y. Kasahara
- Graduate School of Natural Science and Technology Kanazawa University Kanazawa Ishikawa Japan
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- S. Matsuda
- Institute of Space and Astronautical Science Japan Aerospace Exploration Agency Sagamihara Kanagawa Japan
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- M. Shoji
- Institute for Space‐Earth Environmental Research Nagoya University Nagoya Japan
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- S. Nakamura
- Institute for Space‐Earth Environmental Research Nagoya University Nagoya Japan
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- A. Matsuoka
- Graduate School of Science Kyoto University Kyoto Japan
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- S. Imajo
- Institute for Space‐Earth Environmental Research Nagoya University Nagoya Japan
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- I. Shinohara
- Institute of Space and Astronautical Science Japan Aerospace Exploration Agency Sagamihara Kanagawa Japan
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Description
<jats:title>Abstract</jats:title><jats:p>The temporal variation of the energetic electron flux distribution caused by whistler mode chorus waves through the cyclotron resonant interaction provides crucial information on how electrons are accelerated in the Earth's inner magnetosphere. This study employs a data‐driven test‐particle simulation which demonstrates that the rapid change of energetic electron distribution observed by the Arase satellite cannot be simply explained by a quasi‐linear diffusion mechanism, but is essentially caused by nonlinear scattering: the phase trapping and the phase dislocation. In response to upper‐band whistler chorus bursts, multiple nonlinear interactions finally achieve an efficient flux enhancement of electrons on a time scale of the chorus burst. A quasi‐linear diffusion model tends to underestimate the flux enhancement of energetic electrons as compared with a model based on the realistic dynamic frequency spectrum of whistler waves. It is concluded that the nonlinear phase trapping plays an important role in the rapid flux enhancement of energetic electrons observed by Arase.</jats:p>
Journal
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- Journal of Geophysical Research: Space Physics
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Journal of Geophysical Research: Space Physics 126 (4), e2020JA028979-, 2021-04
American Geophysical Union (AGU)
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Details 詳細情報について
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- CRID
- 1360290617895328640
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- ISSN
- 21699402
- 21699380
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- Article Type
- journal article
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- Data Source
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- Crossref
- KAKEN
- OpenAIRE