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An effect of charge exchange processes on the proton enhancement associated with a storm/substorm in the magnetosphere
https://doi.org/10.15094/00004171
https://doi.org/10.15094/000041718b6cec28-a23c-4415-b01b-3b52b8a1b866
名前 / ファイル | ライセンス | アクション |
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KJ00000036102 (1.4 MB)
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Item type | 紀要論文(ELS) / Departmental Bulletin Paper(1) | |||||
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公開日 | 1995-05-01 | |||||
タイトル | ||||||
タイトル | An effect of charge exchange processes on the proton enhancement associated with a storm/substorm in the magnetosphere | |||||
言語 | ||||||
言語 | eng | |||||
資源タイプ | ||||||
資源タイプ識別子 | http://purl.org/coar/resource_type/c_6501 | |||||
資源タイプ | departmental bulletin paper | |||||
ID登録 | ||||||
ID登録 | 10.15094/00004171 | |||||
ID登録タイプ | JaLC | |||||
ページ属性 | ||||||
内容記述タイプ | Other | |||||
内容記述 | P(論文) | |||||
著者名(英) |
Takamura, Naoya
× Takamura, Naoya× Miyaoka, Hiroshi× Tohyama, Fumio× Ejiri, Masaki |
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著者所属(英) | ||||||
en | ||||||
Tokai University | ||||||
著者所属(英) | ||||||
en | ||||||
National Institute of Polar Research | ||||||
著者所属(英) | ||||||
en | ||||||
Tokai University | ||||||
著者所属(英) | ||||||
en | ||||||
National Institute of Polar Research | ||||||
抄録(英) | ||||||
内容記述タイプ | Other | |||||
内容記述 | Energetic protons in the radiation belt of the earth's magnetosphere show energy density enhancement associated with geomagnetic storms/substorms, which observation with Explorer 45 evidently revealed as a nose structure in the E-t spectrogram inside the plasmasphere. An attempt has been made to explain this by an injection model in which energetic protons are injected around a nightside geosynchronous orbit with their subsequent inward motions due to a convection electric field possibly driven by the solar wind and a corotation electric field. It is also important to include a loss mechanism in the model inside the plasmasphere since the protons decay due to charge exchange loss processes with geocoronal neutral hydrogen. The loss rate of protons depends on the hydrogen density and charge exchange cross section. In this study, the effect of the charge exchange loss is examined by computer simulation of energetic proton trajectories in the magnetosphere; the hydrogen density being obtained by the Chamberlain model and the charge exchange cross section being adopted from the latest approximate formula. It is concluded that loss processes play an essential role in the energy density distributions of protons in the near earth radiation belts, especially inside L of about 4. | |||||
雑誌書誌ID | ||||||
収録物識別子タイプ | NCID | |||||
収録物識別子 | AA10756224 | |||||
書誌情報 |
Proceedings of the NIPR Symposium on Upper Atmosphere Physics 巻 8, p. 37-48, 発行日 1995-05 |
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出版者 | ||||||
出版者 | National Institute of Polar Research |