A study of tungsten ions at lower ionization stages and impurity transport for the diagnostics of ITER edge plasmas
| Project/Area Number |
26800282
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| Research Category |
Grant-in-Aid for Young Scientists (B)
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| Allocation Type | Multi-year Fund |
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| Research Field |
Plasma science
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| Research Institution | National Institute for Fusion Science |
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Principal Investigator |
Oishi Tetsutarou 核融合科学研究所, ヘリカル研究部, 助教 (80442523)
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| Project Period (FY) |
2014-04-01 – 2017-03-31
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| Project Status |
Completed (Fiscal Year 2016)
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| Budget Amount *help |
¥3,900,000 (Direct Cost: ¥3,000,000、Indirect Cost: ¥900,000)
Fiscal Year 2016: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2015: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2014: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
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| Keywords | 不純物輸送 / 低電離タングステン / 真空紫外分光 / ITER / 周辺プラズマ / 低価数タングステン |
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| Outline of Final Research Achievements |
Vacuum ultraviolet (VUV) spectra of line emissions from tungsten ions at lower ionization stages have been measured in the Large Helical Device (LHD) using a 3m normal incidence spectrometer. It was found that W VI lines at the wavelengths of 605.926 (5d-6p), 639.683 (5d-6p), 677.722 (5d-6p), 1168.151 (6s-6p) and 1467.959 (6s-6p) Angstrom are emitted with extremely high intensity and entirely isolated from other intrinsic impurity line. The result strongly suggests that those lines may be useful for the spectroscopic study in ITER and other magnetic fusion devices with tungsten materials as the plasma facing component.
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Report
(4 results)
Research Products
(21 results)
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[Presentation] Observation of carbon impurity flow in the edge stochastic magnetic field layer of Large Helical Device and its impact on the edge impurity control2016
Author(s)
T. Oishi, S. Morita, S. Dai, M. Kobayashi, G. Kawamura, X. L. Huang, H. M. Zhang, Y. Liu, M. Goto and the LHD Experiment group
Organizer
The 26th IAEA Fusion Energy Conference
Place of Presentation
Kyoto International Conference Center, Kyoto, Japan
Year and Date
2016-10-17
Related Report
Int'l Joint Research
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[Presentation] Observation of Up-Down Asymmetry in Impurity Line Emissions from the Ergodic Layer of Large Helical Device2015
Author(s)
T. Oishi, S. Morita, S. Dai, M. Kobayashi, G. Kawamura, X. L. Huang, H. M. Zhang, Y. Liu, M. Goto and LHD Experiment group
Organizer
The 10th General Scientific Assembly of the Asia Plasma and Fusion Association (APFA2015)
Place of Presentation
Narayani Heights, Gandhinagar, India
Year and Date
2015-12-14
Related Report
Int'l Joint Research
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