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Cold magnetospheric plasma flows and spacecraft wakes: PicUp3D simulations and Cluster data
https://jaxa.repo.nii.ac.jp/records/6404
https://jaxa.repo.nii.ac.jp/records/6404d385c489-abcb-412c-8104-570ee65ed4c0
| 名前 / ファイル | ライセンス | アクション |
|---|---|---|
49206089.pdf (3.1 MB)
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| Item type | 会議発表論文 / Conference Paper(1) | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| 公開日 | 2015-03-26 | |||||||||
| タイトル | ||||||||||
| タイトル | Cold magnetospheric plasma flows and spacecraft wakes: PicUp3D simulations and Cluster data | |||||||||
| 言語 | en | |||||||||
| 言語 | ||||||||||
| 言語 | eng | |||||||||
| キーワード | ||||||||||
| 主題Scheme | Other | |||||||||
| 主題 | 超音速イオン流 | |||||||||
| キーワード | ||||||||||
| 主題Scheme | Other | |||||||||
| 主題 | 宇宙機後流 | |||||||||
| キーワード | ||||||||||
| 主題Scheme | Other | |||||||||
| 主題 | 地球磁気圏 | |||||||||
| キーワード | ||||||||||
| 主題Scheme | Other | |||||||||
| 主題 | 数値シミュレーション | |||||||||
| キーワード | ||||||||||
| 主題Scheme | Other | |||||||||
| 主題 | 宇宙プラズマ | |||||||||
| キーワード | ||||||||||
| 主題Scheme | Other | |||||||||
| 主題 | 電場 | |||||||||
| キーワード | ||||||||||
| 主題Scheme | Other | |||||||||
| 主題 | 静電位 | |||||||||
| キーワード | ||||||||||
| 主題Scheme | Other | |||||||||
| 主題 | Cluster衛星 | |||||||||
| キーワード | ||||||||||
| 主題Scheme | Other | |||||||||
| 主題 | プラズマ流 | |||||||||
| キーワード | ||||||||||
| 言語 | en | |||||||||
| 主題Scheme | Other | |||||||||
| 主題 | supersonic ion flow | |||||||||
| キーワード | ||||||||||
| 言語 | en | |||||||||
| 主題Scheme | Other | |||||||||
| 主題 | spacecraft wake | |||||||||
| キーワード | ||||||||||
| 言語 | en | |||||||||
| 主題Scheme | Other | |||||||||
| 主題 | Earth magnetosphere | |||||||||
| キーワード | ||||||||||
| 言語 | en | |||||||||
| 主題Scheme | Other | |||||||||
| 主題 | numerical simulation | |||||||||
| キーワード | ||||||||||
| 言語 | en | |||||||||
| 主題Scheme | Other | |||||||||
| 主題 | space plasma | |||||||||
| キーワード | ||||||||||
| 言語 | en | |||||||||
| 主題Scheme | Other | |||||||||
| 主題 | electric field | |||||||||
| キーワード | ||||||||||
| 言語 | en | |||||||||
| 主題Scheme | Other | |||||||||
| 主題 | electrostatic potential | |||||||||
| キーワード | ||||||||||
| 言語 | en | |||||||||
| 主題Scheme | Other | |||||||||
| 主題 | Cluster satellite | |||||||||
| キーワード | ||||||||||
| 言語 | en | |||||||||
| 主題Scheme | Other | |||||||||
| 主題 | plasma flow | |||||||||
| 資源タイプ | ||||||||||
| 資源タイプ識別子 | http://purl.org/coar/resource_type/c_5794 | |||||||||
| 資源タイプ | conference paper | |||||||||
| 著者 |
Engwall, E.
× Engwall, E.
× Eriksson, A. I.
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| 著者所属 | ||||||||||
| Uppsala University Dept. of Astronomy and Space Physics | ||||||||||
| 著者所属 | ||||||||||
| Swedish Institute of Space Physics | ||||||||||
| 著者所属（英） | ||||||||||
| en | ||||||||||
| Uppsala University Department of Astronomy and Space Physics | ||||||||||
| 著者所属（英） | ||||||||||
| en | ||||||||||
| Swedish Institute of Space Physics | ||||||||||
| 出版者 | ||||||||||
| 出版者 | 宇宙航空研究開発機構 | |||||||||
| 出版者（英） | ||||||||||
| 出版者 | Japan Aerospace Exploration Agency (JAXA) | |||||||||
| 書誌情報 |
宇宙航空研究開発機構特別資料 en : JAXA Special Publication: 9th Spacecraft Charging Technology Conference 巻 JAXA-SP-05-001E, p. 772-779, 発行日 2005-08-01 |
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| 抄録（英） | ||||||||||
| 内容記述タイプ | Other | |||||||||
| 内容記述 | Behind a spacecraft in a supersonic ion flow, a negatively charged wake will form. In a sufficiently tenuous plasma, where the potential of a sunlit spacecraft becomes positive, the size of the ion wake can become very much larger than what may be expected from the spacecraft geometrical size. This occurs if the energy of the flowing ions is less than what is needed to overcome the positive spacecraft potential. As the ion flow must be supersonic, this means that the plasma flow has to be quite cold. It turns out that such conditions are quite common in the terrestrial magnetosphere, particularly in the polar wind region. The polar wind cold plasma flow at geocentric distances outside 10 Earth radii can have ion flow kinetic energy around 10 eV, ion temperature of a few eV and be so tenuous that the potential of a spacecraft reaches above 20 V. This plasma is rarely measured on scientific spacecraft, as the ions cannot reach an ion detector mounted on the highly positive spacecraft. Consequently, there are only a few studies of its properties and distribution. However, the cold ion density can be estimated by comparing the number of ions actually detected on the spacecraft with independent density estimates, for example spacecraft potential measurements or wave signatures. Another effect of the negatively charged wake is its impact on electric field measurements on the spacecraft, which shows a clear signature of the wake electrostatic potential. While this is a contamination to the measurement of the natural electric field, it is also potentially useful to derive flow properties like velocity and temperature. In order to understand the problems and exploit the possibilities of this effect, we have analyzed data from the Cluster double probe instrument EFW and used the PicUp3D code to perform PIC simulations. This study has given new information on the properties of the wake, as well as the photoemission from the electric field probes. | |||||||||
| ISSN | ||||||||||
| 収録物識別子タイプ | ISSN | |||||||||
| 収録物識別子 | 1349-113X | |||||||||
| 書誌レコードID | ||||||||||
| 収録物識別子タイプ | NCID | |||||||||
| 収録物識別子 | AA11984031 | |||||||||
| 資料番号 | ||||||||||
| 内容記述タイプ | Other | |||||||||
| 内容記述 | 資料番号: AA0049206089 | |||||||||
| レポート番号 | ||||||||||
| 内容記述タイプ | Other | |||||||||
| 内容記述 | レポート番号: JAXA-SP-05-001E | |||||||||
