2023 Fiscal Year Final Research Report
Building the Foundation for Practical Utilization and International Cooperative Wide-Area Observation of Atmospheric and Oceanic Microparticles
| Project/Area Number |
19KK0289
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| Research Category |
Fund for the Promotion of Joint International Research (Fostering Joint International Research (A))
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| Allocation Type | Multi-year Fund |
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| Review Section |
Basic Section 63010:Environmental dynamic analysis-related
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| Research Institution | Tokyo Metropolitan University (2023)
The University of Tokyo (2019-2022) |
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Principal Investigator |
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| Project Period (FY) |
2019 – 2023
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| Keywords | エアロゾル / 海洋微粒子 / 光散乱 / 観測装置 |
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| Outline of Final Research Achievements |
Working in collaboration with researchers and technicians from the destination research institution, we made two improvements to the "Complex Scattering Amplitude Sensing Method," a versatile analysis technique for dispersed particles in either liquid or gas phases. Firstly, we designed and developed an optical system and detector capable of detecting complex scattering amplitudes for two orthogonal polarization components. This enhancement allows for the retrieval of information on particle non-sphericity, leading to a significant improvement in the discrimination capability of particle types in environments such as mineral dust. Secondly, we developed a system to detect forward scattering waves while simultaneously detecting backward scattering waves using a low-coherence Michelson interferometer. With this technology, it became possible to measure the complex scattering amplitudes for each polarization with an error margin of ±5%.
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| Free Research Field |
大気化学
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| Academic Significance and Societal Importance of the Research Achievements |
本研究で開発した微粒子分析法は、試料の前処理が要らないため、大気や海水をそのまま導入して連続的に測定することができる。今後、地球環境問題に関わる大気・海洋中の多種多様な汚染微粒子の広域観測への応用が期待される。また、試料の汚染や破壊をすることがない分析法であるため、他の分析装置と組み合わせた複合分析や、血液など生体試料の計測にも利用できる。産業利用が急速に広まっている水中の微小気泡（ファインバブル）についても、他の不純物粒子と区別した正確な測定が初めて可能となる。本研究で開発した汎用粒子分析法は、今後、環境動態解析・産業技術・医療技術などに応用されていくことが期待される。
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