| Budget Amount *help |
¥4,550,000 (Direct Cost: ¥3,500,000、Indirect Cost: ¥1,050,000)
Fiscal Year 2014: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2013: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2012: ¥2,470,000 (Direct Cost: ¥1,900,000、Indirect Cost: ¥570,000)
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| Outline of Final Research Achievements |
We investigate formation of collisionless shocks and particle acceleration mechanism operating around those shocks with large-scale plasma particle simulations. We show that large amplitude electromagnetic waves with strong magnetic field fluctuations are generated in the upstream region of the shock, a part of plasma particles are accelerated to high energies around the shock front and form power-law like energy spectra, and this particle acceleration mechanism is a fast Fermi-type mechanism in which accelerated particles go back and forth around the shock front within the times of the order of their gyro periods. In addition, we study some numerical problems in plasma particle simulation method which can occur especially in simulations of particle acceleration in collisionless shocks.
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