| Project/Area Number |
20740283
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| Research Category |
Grant-in-Aid for Young Scientists (B)
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| Allocation Type | Single-year Grants |
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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 |
MIYOSHI Yoshizumi Nagoya University, 太陽地球環境研究所, 助教 (10377781)
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| Project Period (FY) |
2008 – 2010
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| Project Status |
Completed (Fiscal Year 2010)
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| Budget Amount *help |
¥4,290,000 (Direct Cost: ¥3,300,000、Indirect Cost: ¥990,000)
Fiscal Year 2010: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2009: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2008: ¥1,950,000 (Direct Cost: ¥1,500,000、Indirect Cost: ¥450,000)
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| Keywords | 内部磁気圏 / 放射線帯 / 波動粒子相互作用 / シミュレーション / 計算機シミュレーション / 宇宙天気 / ジオスペース / 粒子加速 / 宇宙プラズマ |
|---|
| Research Abstract |
We have investigated temporal-spatial evolution of whistler mode waves in the inner magnetosphere using the global and microscopic simulations and have compared with the satellite observations. The average distributions of whistler mode waves taken from the simulations are consistent with the CRRES statistical survey results. The microscopic simulation, using the distribution function and fp/fc from the global simulation as an initial condition, showed significant evolution of whistler mode waves. From the simulation study on a magnetic storm, we observed shrinkage of the plasmasphere, continuous hot electron injections due to enhanced convection, and resultant whistler wave generations near the plamapause. These results are consistent with the statistical analysis of hot electron and whistler mode waves during the events in which large flux enhancement of the MeV electrons takes place. Moreover, we confirmed that the frequency with maximum growth depends on the region and the phase of a magnetic storm, which are consistent with the statistical survey from the Cluster satellite.
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