Study on nonlinear ion dynamics in electromagnetic ion cyclotron wave emissions
| Project/Area Number |
26800256
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| Research Category |
Grant-in-Aid for Young Scientists (B)
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| Allocation Type | Multi-year Fund |
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| Research Field |
Space and upper atmospheric physics
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| Research Institution | Nagoya University |
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Principal Investigator |
Shoji Masafumi 名古屋大学, 宇宙地球環境研究所, 特任助教 (80722082)
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| Project Period (FY) |
2014-04-01 – 2017-03-31
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| Project Status |
Completed (Fiscal Year 2016)
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| Budget Amount *help |
¥3,900,000 (Direct Cost: ¥3,000,000、Indirect Cost: ¥900,000)
Fiscal Year 2016: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2015: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
Fiscal Year 2014: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
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| Keywords | 非線形波動粒子相互作用 / 地球内部磁気圏 / 計算機シミュレーション / 超高層物理学 / 電磁イオンサイクロトロン波動 / イオンハイブリッドシミュレーション |
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| Outline of Final Research Achievements |
We performed computer simulations on nonlinear interactions between electromagnetic ion cyclotron (EMIC) waves and high energy ions and relativistic electrons in the Earth's magnetosphere. The EMIC rising tone emissions with different spectrum characteristics are successfully reproduced in the simulations. The efficiency and time scale of the scattering and acceleration of protons are controlled by the wave spectra. The large amount of relativistic electrons with wide energy range are also scattered by the waves. We also performed the simulations with longitudinal electric fields, reproducing the EMIC falling tone emissions. We show that these plasma phenomena are conducted by the nonlinear wave particle interactions.
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Report
(4 results)
Research Products
(18 results)
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[Journal Article] Fast modulations of pulsating proton aurora related to subpacket structures of Pc1 geomagnetic pulsations at subauroral latitudes2016
Author(s)
M. Ozaki, K. Shiokawa, Y. Miyoshi, R. Kataoka, S. Yagitani, T. Inoue, C.-W Jun, R. Nomura, K. Sakaguchi, Y. Otsuka, M. Shoji, I. Schofield, M. Connors, V. K. Jordanova
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Journal Title
Geophysical Research Letters
Volume: 43
Issue: 15
Pages: 7859-7866
DOI
Related Report
Peer Reviewed / Open Access / Int'l Joint Research
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[Journal Article] Magnetic fluctuations embedded in dipolarization inside geosynchronous orbit and their associated selective acceleration of O+ ions2014
Author(s)
Nose, M., K. Takahashi, K. Keika, L. M. Kistler, K. Koga, H. Koshiishi, H. Matsumoto, M. Shoji, Y. Miyashita, and R. Nomura
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Journal Title
J. Geophys. Res.
Volume: 119
Issue: 6
Pages: 1-17
DOI
Related Report
Peer Reviewed / Acknowledgement Compliant
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