| Co-Investigator(Kenkyū-buntansha) |
KOKUBUN Susumu Nagoya Univ., STE Laboratory, Professor, 太陽地球環境研究所, 教授 (00011502)
MATSUMOTO Hiroshi Kyoto Univ., RASC,Professor, 超高層電波研究センター, 教授 (00026139)
TERASAWA Toshio Univ.Tokyo, Faculty of Science, Professor, 大学院・理学研究科, 教授 (30134662)
MORIOKA Akira Tohoku Univ., Faculty of Science, Professor, 理学部, 教授 (50004479)
MACHIDA Shinobu Kyoto Univ., Faculty of Science, Associate Professor, 理学部, 助教授 (70209469)
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| Research Abstract |
There are various distinct plasma regimes in geospace, and between adjacent regions are formed boundary layrs, such as magnetopause, low-latitude boundary layr, plasma sheet boundary layr, and plasmapause. Ideal MHD theory predicts no transport of energy, momentum and mass through these collisionless boundary layrs, but microscopic kinetic processes are actually effective for mutual interactions of the adjacent regions, which play an important role in the structure and dynamics of the magnetosphere and geospace. The purpose of this research project was to study physics of the microscopic processes in the formatin of the boundary layr and transport of energy, momentum and mass through it, on the basis of high-resolution in-situ observations of plasmas and fields by Geotail and Akebono. The research was promoted through a number of meetings for discussions of observational data in comparison with theory and computer simulations. As an important activity, we made efforts in education of y
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oung scientists including graduate students, which may increase the potential of basic science in Japan. A number of fruitful results from Geotail observations were brought forth by this project, and highlighted in the international conference on "New Perspectives of Magnetotail Physics" which was held at Kanazawa in November 1996. About 150 papers on the Geotail results have been (and are going to be) published in scientific journals during three fiscal years of 1995-1997, of which some selected papers are listed in Item 11. The most notable result pertains to understanding of magnetic reconnection, which acts important roles in the formation of the plasma sheet boundary layr and the explosive energy release in the magnetotail during substorms. In particular, comparative studies of high-resolution observational data with results from hybrid-code and full-particle simulations have made a significant advance in understanding of transport, energization and acceleratoin processes of particles by the magnetic reconnection. Less
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