2007 Fiscal Year Final Research Report Summary
Developmental Research for Establishing Measurement Techniques of Multi-Composition Space Plasma over a Wide Energy Range and Elucidating the Space Plasma Interaction in Geospace
| Project/Area Number |
16204037
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| Research Category |
Grant-in-Aid for Scientific Research (A)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Space and upper atmospheric physics
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| Research Institution | The University of Tokyo (2007)
Rikkyo University (2004-2006) |
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Principal Investigator |
HIRAHARA Masafumi The University of Tokyo, Department of Earth and Planetary Science, Professor (50242102)
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| Co-Investigator(Kenkyū-buntansha) |
YANAGIMACHI Tomoki Rikkyo University, Department of Phyaics, Associate Professor (70200540)
EBIHARA Yusuke Nagoya University, Institute of Advanced Research, Lecturer (80342616)
SEKI Kanako Nagoya University, Solar-Terrestrial Environment Laboratory, Associate Professor (20345854)
TAKASHIMA Takeshi The University of Tokyo, Japan Aerospace Exploration Agency, Institute of Space and Astronautical Science, Associate Professor (10298193)
SAITO Yoshifumi The University of Tokyo, Japan Aerospace Exploration Agency, Institute of Space and Astronautical Science, Associate Professor (30260011)
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| Project Period (FY) |
2004 – 2007
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| Keywords | Space Plasma / Particle / Magnetosphere / In-situ Observation / Energy-Mass Analysis / Multi-Composition Plasma / Interaction / Wide Energy-Range Measurement / Geospace |
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| Research Abstract |
In order to realize the wide energy-range measurement in the in-situ geospace plasma/particle observations, we have developed the following elements/facilities:
1. High-performance and multi-functional ion/electron beam line producing the parallel and large profile over the energy range of 8-200 keV
2. High-energy particle instrument using the time-of-flight technique and strip-type Silicon solid-state detector arrays
3. Medium-energy plasma instruments using the cusp-type electrostatic analyzer, the time-of-flight technique, and strip-type Silicon solid-state detector arrays
4. Simple ion/electron beam line for the energy range of 10-120 keV
These beam line would be useful and sometimes crucial when we are developing several sets of plasma/particle instruments for the future exploration missions in parallel. On the basis of international collaboration, the same type of the beam line is also being fabricated overseas. An actual plasma instrument for the future mission is also under the deve
… More
lopment through a collaborative research.
As the comprehensive data analysis and modeling works, numerous types of observational results obtained by on-going or previous satellite missions have been surveyed and considered for the synthetic interpretation/understanding of the geospace environment, especially during space storm and substorm. The following scientific issues are addressed:
1. The comprehensive studies using satellite/ground-based observations and simulation have suggested that the medium-energy ions with 1-100 keV energies, trapped by the geomagnetic field, are essential not only for producing the ring current but for changing the electrostatic potential distribution significantly in the geospace via their field-aligned current effects.
2. The high-(>100 keV) and medium(1-100 keV)-energy ions are strongly coupled each other through the geomagnetic field
3. The oxygen ions with origins of the solar wind and the ionosphere are injected into the geospace particularly during space storms
These results indicate that the cross-energy coupling and inter-region coupling are important for the geospace environment. Less
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Research Products
(336 results)
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[Journal Article] Source location of the wedge-like dispersed ring current in the morning sector during a substorm2006
Author(s)
M. Yamauchi, P. C. Brandt, Y. Ebihara, I. Dandouras, H. Nilsson, R. Lundin, H. Reme, C. Vallat, P.-A. Lindquvist, A. Balogh, P. W. Daly
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Journal Title
Journal of Geophysical Research 113
Pages: 10.1029/2006JA011621
Description
「研究成果報告書概要(欧文)」より
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[Presentation] 小型科学衛星ERG計画2008
Author(s)
小野高幸, 熊本篤志, 笠羽康正, 他
Organizer
地球惑星科学連合大会
Place of Presentation
千葉
Year and Date
2008-05-28
Description
「研究成果報告書概要(和文)」より
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[Presentation] 小型衛星ERGの検討状況2005
Author(s)
塩川和夫, ERG検討チーム
Organizer
地球電磁気・地球惑星圏学会
Place of Presentation
京都
Year and Date
2005-10-01
Description
「研究成果報告書概要(和文)」より
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[Presentation] D2004
Author(s)
M. Hirahara, T. Yanagimachi, H. Saito, Y. Saito, T. Takashima, K. Asamura
Organizer
AOGS
Place of Presentation
Singapore
Year and Date
2004-07-06
Description
「研究成果報告書概要(欧文)」より
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[Presentation] H2004
Author(s)
M. Hirahara, H. Saito, T. Yanagimachi, T. Takashima, K. Asamura, Y. Saito
Organizer
AOGS
Place of Presentation
Singapore
Year and Date
2004-07-06
Description
「研究成果報告書概要(欧文)」より
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