2015 Fiscal Year Final Research Report
Generation processes of energetic particles distributed in the heliospheric outer boundary
Project/Area Number |
25400475
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Research Category |
Grant-in-Aid for Scientific Research (C)
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Allocation Type | Multi-year Fund |
Section | 一般 |
Research Field |
Space and upper atmospheric physics
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Research Institution | Tokyo Institute of Technology |
Principal Investigator |
Tsubouchi Ken 東京工業大学, 大学院理工学研究科(理学系), 流動研究員 (60397601)
|
Project Period (FY) |
2013-04-01 – 2016-03-31
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Keywords | 宇宙科学 / 宇宙空間 / 宇宙線 / 超高層物理学 / プラズマ・核融合 / 粒子加速 / 太陽圏 |
Outline of Final Research Achievements |
The purpose of this research is to elucidate the physical process of generating high energy particles in the heliospheric boundary region by means of numerical simulations. Particular attention is paid to the dynamics of pickup ions, which originate in interstellar neutral particles and are ionized in the heliosphere. It is validated by investigation of their acceleration mechanism at collisionless shock waves, stability of the energy distribution, and the parametric dependence on the acceleration efficiency that pickup ions can be the dominant component of the suprathermal particles (keV to MeV range) in the heliosphere, which will be the source of further accelerated cosmic ray particles.
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Free Research Field |
宇宙プラズマ物理学
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