2023 Fiscal Year Final Research Report
Development of three-dimensional measurement method of velocity distribution function by using ghost imaging absorption spectroscopy
| Project/Area Number |
20K20914
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| Research Category |
Grant-in-Aid for Challenging Research (Exploratory)
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| Allocation Type | Multi-year Fund |
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| Review Section |
Medium-sized Section 14:Plasma science and related fields
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| Research Institution | Nihon University |
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Principal Investigator |
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| Co-Investigator(Kenkyū-buntansha) |
大野 哲靖 名古屋大学, 工学研究科, 教授 (60203890)
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| Project Period (FY) |
2020-07-30 – 2024-03-31
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| Keywords | ゴーストイメージング / シングルピクセルイメージング / プラズマ分光 |
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| Outline of Final Research Achievements |
Absorption spectroscopy has the disadvantage of only obtaining information about the absorber integrated over the light propagation path. In this study, we focus on the fact that ghost imaging relies on the correlation between structured light and absorbed light intensity. Our aim is to develop a novel absorption spectroscopy method with three-dimensional spatial resolution by localizing the correlation on the imaging plane of structured light and applying it to the measurement of recombining plasma. We developed a ghost-imaging absorption spectroscopy system equipped with an imaging system. In a proof-of-principle experiment using a test target, we demonstrated that this system has resolution in the line-of-sight direction, despite being an absorption spectroscopy method. Additionally, we applied it to a high-density helicon wave plasma experimental device and performed ghost-imaging absorption spectroscopy measurements of metastable helium atoms.
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| Free Research Field |
プラズマ理工学
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| Academic Significance and Societal Importance of the Research Achievements |
本研究で開発した技術は，ゴーストイメージングの構造化照明に結像系を導入し，視線方向に分解能を持つ吸収分光測定を可能にしている．人体や建築物の診断など，空間的な広がりを持つ物体の内部構造を可視化する需要は非常に高いと考えられる．今回開発した新しい可視化技術は，プラズマ診断にとどまらず，将来的には多くの分野での応用が期待される．この技術により，詳細な内部構造の解析が可能となり，特に医療や建築，材料科学などの分野で活用される可能性がある．
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