Non-equilibrium ion spectroscopy of tungsten highly charged ions for measurements of ionization cross sections
| Project/Area Number |
18H01201
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| Research Category |
Grant-in-Aid for Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Review Section |
Basic Section 14020:Nuclear fusion-related
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| Research Institution | National Institute for Fusion Science |
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Principal Investigator |
Kato Daiji 核融合科学研究所, ヘリカル研究部, 准教授 (60370136)
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| Co-Investigator(Kenkyū-buntansha) |
坂上 裕之 核融合科学研究所, ヘリカル研究部, 助教 (40250112)
中村 信行 電気通信大学, レーザー新世代研究センター, 教授 (50361837)
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| Project Period (FY) |
2018-04-01 – 2023-03-31
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| Project Status |
Completed (Fiscal Year 2022)
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| Budget Amount *help |
¥18,070,000 (Direct Cost: ¥13,900,000、Indirect Cost: ¥4,170,000)
Fiscal Year 2022: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000)
Fiscal Year 2021: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000)
Fiscal Year 2020: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000)
Fiscal Year 2019: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000)
Fiscal Year 2018: ¥14,950,000 (Direct Cost: ¥11,500,000、Indirect Cost: ¥3,450,000)
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| Keywords | 多価イオン / 電離断面積 / 電子ビームイオントラップ / 極端紫外スペクトル / 電離断面積データ / タングステン / EUV分光 / タングステン多価イオン |
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| Outline of Final Research Achievements |
Since tungsten is used as a divertor material in the International Thermonuclear Experimental Reactor (ITER), accurate prediction of atomic processes of highly charged tungsten ions in high-temperature plasmas of ITER is an important issue to generate high-performance plasmas and to sustain stable deuterium-tritium fusion reactions in the plasmas. In this subject, we attempted to measure electron impact ionization cross sections of highly charged ions of heavy elements, which had been very difficult so far, using a compact electron beam ion trap (CoBIT) and time-resolved spectroscopy of extreme ultraviolet emission lines, which can be performed in a university laboratory, and have succeeded in obtaining ionization cross sections for highly charged gold ions. In addition, detailed knowledge of the ionization processes of highly charged ions in the CoBIT was obtained by comparison with theoretical models.
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| Academic Significance and Societal Importance of the Research Achievements |
本研究成果により、今後、重元素多価イオンの電離過程における多電子相関効果、相対論効果、および量子電磁力学効果のより詳細な理解が期待できるため、学術的な波及効果は大きいと考えられる。また、本期間中には実施できなかったが、タングステン多価イオンの電離断面積の実験的検証により、ITERの炉心プラズマでのタングステン多価イオンの分布を予測する物理モデルの精度が高まり、核融合発電の進展に貢献することが期待される。このように、社会的にも大きな意義のある成果が得られたと考えている。
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Report
(6 results)
Research Products
(59 results)
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[Journal Article] The M1 transitions and visible spectra of W13+ ion2022
Author(s)
Liu Yile、Wu Cunqiang、Ding Xiaobin、Zhang Fengling、Zhang Ling、Yao Ke、Yang Yang、Koike Fumihiro、Murakami Izumi、Kato Daiji、Sakaue Hiroyuki A.、Nakamura Nobuyuki、Dong Chenzhong
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Journal Title
Physics Letters A
Volume: 454
Pages: 128500-128500
DOI
Related Report
Peer Reviewed / Int'l Joint Research
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[Journal Article] Fusion Research and International Collaboration in the Asian Region2018
Author(s)
S.Morita, L.Q.Hu, Y.K.Oh, N.Ashikawa, M.Isobe, D.Kato, Y.Kishimoto, S.Ohdachi, S.Sakakibara, Y.Todo, Y.Kamada, D.Raju and M.Xu
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Journal Title
Plasma and Fusion Research
Volume: 13
Issue: 0
Pages: 3502046-3502046
DOI
NAID
ISSN
1880-6821
Year and Date
2018-05-10
Related Report
Peer Reviewed / Open Access / Int'l Joint Research
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