Development of plasma flow velocity field imaging using vector tomography technique
| Project/Area Number |
18K18747
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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 | The University of Tokyo |
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Principal Investigator |
Tanabe Hiroshi 東京大学, 大学院新領域創成科学研究科, 准教授 (30726013)
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| Project Period (FY) |
2018-06-29 – 2022-03-31
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| Project Status |
Completed (Fiscal Year 2021)
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| Budget Amount *help |
¥6,370,000 (Direct Cost: ¥4,900,000、Indirect Cost: ¥1,470,000)
Fiscal Year 2020: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2019: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2018: ¥4,550,000 (Direct Cost: ¥3,500,000、Indirect Cost: ¥1,050,000)
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| Keywords | プラズマ・核融合 / プラズマ診断 / 磁気リコネクション / コンピュータトモグラフィ / 球状トカマク / 加速・加熱・輸送 |
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| Outline of Final Research Achievements |
An application study of tomographic reconstruction technique to ion Doppler spectroscopy has been carried out. As in medical imaging such as X-ray CT & MRI, we carried out the development of 2D imaging measurement of internal ion temperature and velocity profile in toroidal plasma from multiple line-integrated spectra using a novel scalar and vector tomography method. We developed a 96CH/320 ultra-high resolution imaging spectroscopy system and applied it to a toroidal plasma merging experiment in TS-6. The tomographic ion Doppler spectroscopy system successfully contributed to reveal ion acceleration and heating characteristics of magnetic reconnection.
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| Academic Significance and Societal Importance of the Research Achievements |
本研究ではX線CTやMRIで広く知られるコンピュータトモグラフィの応用分野の中でもとりわけ先進的課題として、測定対象のパラメータが単純なラドン変換で投影されない、線スペクトルのドップラー幅やドップラーシフトといった発光の重み付き平均として得られる投影データから逆問題を解決する手法の開発に取り組んだ。医用数学、流体力学、プラズマ分光学の考え方を動員した分野横断的アプローチで逆問題解決を試みる計測科学としての新規性に加え、実際にデータを取得する測定装置開発、プラズマ実験応用が進められ、シミュレーション予測と異なる新しい構造形成現象を実験主導で新たに発見、プラズマ科学の新しいフロンティアを開拓した。
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Report
(5 results)
Research Products
(66 results)
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[Journal Article] Overview of Merging Spherical Tokamak Experiments and Simulations for Burning, High-Beta and/or Absolute Minimum-B Plasma Formation2021
Author(s)
Y. Ono, M. Inomoto, H. Tanabe, H. Yamaguchi, M. Akimitsu, M. Gryaznevich, S. McNamara, P. Buxton, J. Kompulla, J.Wood, V. Nemytov, K. McClements, C.Z. Cheng, S. Usami and R. Horiuchi
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Journal Title
Fusion Energy 2020
Volume: IAC/P4-3
Pages: 1-8
Related Report
Peer Reviewed / Int'l Joint Research
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[Journal Article] Overview of Merging Spherical Tokamak Experiments and Simulations for Burning, High-Beta and/or Absolute Minimum-B Plasma Formation2021
Author(s)
Y. Ono, M. Inomoto, H. Tanabe, H. Yamaguchi, M. Akimitsu, M. Gryaznevich, S. McNamara, P. Buxton, J. Kompulla, J. Wood, V. Nemytov, K. McClements, C. Z. Cheng, S. Usami and R. Horiuchi
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Journal Title
28th IAEA Fusion Energy Conference (FEC 2020)
Volume: IAC/P4-3
Pages: 1-8
Related Report
Peer Reviewed / Int'l Joint Research
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[Presentation] High field application of merging/reconnection plasma startup in the ST40 and TS-6 spherical tokamaks2021
Author(s)
H. Tanabe, M. Gryaznevich, S. Mcnamara, J. Wood, H. Tanaka, M. Akimitsu, Y. Cai, D. Osin, P. Buxton, A. Rengle, O. Asunta, C. Z. Cheng, M. Inomoto and Y. Ono
Organizer
5th Asia-Pacific Conference on Plasma Physics (AAPPS-DPP2021)
Related Report
Int'l Joint Research / Invited
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[Presentation] Overview of Merging Spherical Tokamak Experiments and Simulations for Burning, High-Beta and/or Absolute Minimum-B Plasma Formation2021
Author(s)
Y. Ono, M. Inomoto, H. Tanabe, H. Yamaguchi, M. Akimitsu, M. Gryaznevich, S. McNamara, P. Buxton, J. Kompulla, J.Wood, V. Nemytov, K. McClements, C.Z. Cheng, S. Usami and R. Horiuchi
Organizer
28th IAEA Fusion Energy Conference (FEC 2020)
Related Report
Int'l Joint Research
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[Presentation] Micro/macro-scale ion heating and transport process of magnetic reconnection during merging plasma startup of TS-6 spherical tokamak2019
Author(s)
H. Tanabe, Q. Cao, H. Tanaka, T. Ahmadi, M. Akimitsu, M. Gryaznevich,T. O'Gorman, J. Wood, R. Scannell, K. G. McClements, M. Inomoto and Y. Ono
Organizer
61th Annual Meeting of the APS Division of Plasma Physics
Related Report
Int'l Joint Research
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