惑星分光観測衛星プロジェクトチーム
Profile Information
- Affiliation
- Professor (Director), Institute of Space and Astronautical Science, Department of Interdisciplinary Space Science, Japan Aerospace Exploration AgencyProfessor, School of Physical Sciences, SOKENDAI (The Graduate University for Advanced Studies)
- Degree
- Doctor of Engineering(Mar, 1992, The University of Tokyo)
- Researcher number
- 50249934
- ORCID ID
https://orcid.org/0000-0002-2845-9636- J-GLOBAL ID
- 200901018824285220
- researchmap Member ID
- 1000144502
宇宙環境の特性を利用した物質科学研究を通じて、地上及び宇宙空間における物質変化の基礎過程の解明に取り組んでいます。特に、微小重力、過重力及び強磁場環境を利用し、凝固・結晶成長における界面カイネティクス、熱・物質輸送、核生成過程及び熱物性を研究しています。また、結晶成長界面の形態と界面近傍の温度場・濃度場を同時に捉える顕微干渉法などのその場観察・計測技術を開発してきました。
これらの技術と実験手法を、地上実験から落下塔、小型ロケット、宇宙実験・観測フリーフライヤ（SFU）、観測ロケット、国際宇宙ステーションへと段階的に発展させてきました。JAXAのS-520観測ロケットを用いた国内共同実験に加え、NASAとの日米協力による観測ロケット実験、欧州との国際協力によるMASER実験、及びドイツとの日独協力によるTEXUS実験を推進し、宇宙ダストの核生成、半導体結晶成長、熱拡散及び燃焼現象に研究を展開しています。宇宙実験により、地上では重力の影響に隠される物理・化学過程を明らかにし、その成果を材料プロセス及び宇宙科学へ還元することを目指しています。
近年は、これまで培ってきた宇宙環境利用科学、物質科学及び飛翔実験技術を国際宇宙探査へ接続し、月・火星を含む長期的な宇宙活動における物質科学、材料プロセス及び研究基盤の形成にも取り組んでいます。基礎科学と将来の探査活動を支える観測・実験技術を相互に発展させ、有人・無人の宇宙活動を継続的な科学成果につなげることを目指しています。
Research Interests
15Research Areas
5Research History
17-
Jun, 2021 - Present
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Apr, 2017 - Present
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Apr, 2014 - Present
Education
3-
Apr, 1989 - Mar, 1992
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Apr, 1987 - Mar, 1989
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Apr, 1983 - Mar, 1987
Major Committee Memberships
25-
Apr, 2017 - Present
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Oct, 2015 - Present
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Jul, 2011 - Present
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Jan, 2016 - Mar, 2024
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Oct, 2019 - Sep, 2023
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Dec, 2014 - Nov, 2016
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Apr, 2005 - Mar, 2007
Awards
7-
Oct, 2003
Papers
189-
International Journal of Heat and Mass Transfer, 266 128799-128799, Sep, 2026 Peer-reviewed
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International Journal of Microgravity Science and Application, 43(2) 430201, Apr 30, 2026 Peer-reviewedIn the phase analysis, accuracy can degrade when the intensity of bright and dark lines in interference fringes varies significantly spatially, or when the phase change Δφ is temporally discontinuous. In this study, we improved the interference fringe analysis method by focusing on a local region in phase analysis and classifying phase inter-frame differences δφ’ in phase unwrapping. The objective of this study is to clarify how to set the threshold for classifying δφ’ and the accuracy of the phase φ and phase change Δφ obtained by the proposed method. Both experimentally obtained in a microgravity and artificially generated interference fringes were analyzed using the proposed method. As a result, the obtained spatial distribution of Δφ had a few outliers. In addition, it was revealed that a reliable threshold for classifying δφ’ can be automatically determined by using the total amount of tolerable noise and estimated δφ’. The phase error and the phase change error were as small as 0.025π and 0.034π rad, respectively, which is less than one-fifth of the conventional method.
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Defect and Diffusion Forum, 439 291-304, Feb 20, 2025 Peer-reviewedIn this study, we proposed a moved-view analysis, a method for obtaining the Soret coefficient ST by analyzing the interference fringe change during field-of-view movement in the steady state. This analysis was designed to solve the problem that the sign of the concentration gradient could also be reversed if the plot of the concentration distribution was only slightly shifted owing to the narrow field of view. The data obtained from the experiment conducted to measure ST at the International Space Station were analyzed using moved-view analysis. For the moved-view analysis, the linearity of the concentration distribution induced by the Soret effect is larger than that for the method without field-of-view movement, and a more reliable ST can be obtained. The analysis error that sometimes occurred when the laser wavelength switched led to the underestimation of the phase change Δϕ, resulting in generating the data with low linearity. This unreliable data should be removed.
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ACS Applied Materials and Interfaces, 16(35) 46433-46441, Sep 4, 2024 Peer-reviewedLast author
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Frontiers in Microbiology, 14 1253436, Dec, 2023 Peer-reviewed
Misc.
291-
Space Utilization Research, Vol. 40 2025: Proceedings of The Fortieth Space Utilization Symposium, Mar, 2026
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Space Utilization Research, Vol. 38 2023: Proceedings of The Thirty-eighth Space Utilization Symposium, Jan, 2024
Books and Other Publications
12-
The international academy of astronautics(IAA), 2010 (ISBN: 9782917761090)
Presentations
560-
14th Asian Microgravity Symposium, Dec 4, 2024, Indian Micro-gravity society
Teaching Experience
5-
Jan, 2020 - PresentHuman Spaceology: The Study of Human Space Activities (Kyoto University)
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- Present宇宙環境利用工学特論 (総合研究大学院大学)
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Apr, 2000 - Sep, 2000固体物理特論 (三重大学工学部)
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Oct, 1997 - Mar, 1998C言語演習 (東京農工大学)
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航空宇宙材料特論 (芝浦工業大学)
Professional Memberships
8-
Jan, 1992 - Present
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Apr, 2016 - Mar, 2025
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- Mar, 2016
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- Dec, 2014
Works
1Research Projects
38-
Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research (A), Japan Society for the Promotion of Science, Apr, 2020 - Mar, 2025
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Grants-in-Aid for Scientific Research, Japan Society for the Promotion of Science, Jun, 2019 - Mar, 2022
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Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research (B), Japan Society for the Promotion of Science, Apr, 2019 - Mar, 2022
Industrial Property Rights
3-
Two conductive solid materials with their respective different compositions are joined in parallel with a gravity direction thereof, and then, heated and melted under static magnetic field orthogonal to the gravity direction to form two conductive melts with their respective different compositions. Then, the conductive melts are maintained for a predetermined period of time under the static magnetic field, and cooled and solidified.
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製鋼、金属鋳造・精錬、及び半導体作製技術などの分野において好適に用いることのできる、導電性融液中の拡散係数計測方法及び拡散係数計測装置
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Two conductive solid materials with their respective different compositions are joined in parallel with a gravity direction thereof, and then, heated and melted under static magnetic field orthogonal to the gravity direction to form two conductive melts with their respective different compositions. Then, the conductive melts are maintained for a predetermined period of time under the static magnetic field, and cooled and solidified.
Academic Activities
9-
Review, evaluationMinistry of Education, Culture, Sports, Science and Technology, Apr, 2017 - PresentContributed to the review and evaluation of research proposals and research plans under the Space and Aeronautical Science and Technology Promotion Program, drawing on expertise in space science and space environment utilization.
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Planning, Management, etc.Committee on Space Environment Utilization, Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency (Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency), Oct, 2015 - PresentAs secretary of the committee, contributed to the planning and coordination of research programs, joint-use research, spaceflight experiment opportunities, and research-community activities in space environment utilization science, including expert consideration of research proposals and experimental plans.
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Planning, Management, etc.Committee on International Space Exploration, Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency (Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency), Oct, 2019 - Sep, 2023As chair of the committee, planned and coordinated scientific studies on international lunar and Martian exploration from the perspectives of space science and space environment utilization, and led the consolidation of committee discussions and recommendations on scientific objectives, research scenarios, and future exploration activities.
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Panel moderator, Session chair, etc.JSASS, Feb 26, 2022 - Mar 4, 2022
