| Budget Amount *help |
¥17,160,000 (Direct Cost: ¥13,200,000、Indirect Cost: ¥3,960,000)
Fiscal Year 2019: ¥4,420,000 (Direct Cost: ¥3,400,000、Indirect Cost: ¥1,020,000)
Fiscal Year 2018: ¥4,550,000 (Direct Cost: ¥3,500,000、Indirect Cost: ¥1,050,000)
Fiscal Year 2017: ¥3,900,000 (Direct Cost: ¥3,000,000、Indirect Cost: ¥900,000)
Fiscal Year 2016: ¥4,290,000 (Direct Cost: ¥3,300,000、Indirect Cost: ¥990,000)
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| Outline of Final Research Achievements |
In the dayside boundary layer of a small-scale magnetosphere, an electric field is formed due to the difference in the motion of solar wind electrons and ions, and the formation of a non-thermal component due to electron acceleration is revealed. Plasma simulations with the electron beam are performed, and it is suggested that the density disturbance and electric field excitation in the boundary layer can be caused by current-driven plasma instabilities. Next, hybrid particle simulations are performed to investigate the density, magnetic field, and current in the dayside boundary layer of Mercury's magnetosphere. The meandering motion of solar wind ions in the dayside boundary layer is clarified, and it is shown in three dimensions that the dayside boundary is in direct contact with the Mercury surface when the solar wind dynamic pressure is higher than the magnetic pressure in the Mercury magnetosphere.
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