Physical Plasma model research for radio-frequency electromagnetic analysis on plasma peripheral region
| Project/Area Number |
16K06944
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Multi-year Fund |
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| Section | 一般 |
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| Research Field |
Nuclear fusion studies
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| Research Institution | National Institute for Fusion Science |
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Principal Investigator |
KASAHARA Hiroshi 核融合科学研究所, ヘリカル研究部, 准教授 (50435517)
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| Project Period (FY) |
2016-04-01 – 2020-03-31
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| Project Status |
Completed (Fiscal Year 2019)
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| Budget Amount *help |
¥4,810,000 (Direct Cost: ¥3,700,000、Indirect Cost: ¥1,110,000)
Fiscal Year 2019: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2018: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000)
Fiscal Year 2017: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2016: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000)
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| Keywords | 周辺部のプラズマ物理モデル / 高周波電場 / 波動計算 / 高周波計測 / プラズマ周辺物理モデル / 大電力電磁波励起 / 相関計測 / 波動物理 / プラズマモデリング / 周辺プラズマ揺動計測 / 高周波特性の改善 / 計測領域の拡大 / 他の実験からのフィードバック / 最適化による再設計 / 揺動伝搬 / 熱プラズマ / 周辺部 / プラズマ分散関数 / 高調波効果 / プラズマ・核融合 |
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| Outline of Final Research Achievements |
In order to make a physical model with high power radio-frequency electric-field on peripheral region of plasma, a multi-array electrostatic probe and high-frequency magnetic probe was designed and plasma measurements were performed. In actual plasma measurement, the measurement probe has strong damaged by the coupled electric field of excited radio-frequency, a large number of dielectric breakdowns had been occurred at the feedthrough part of the probe, and a non-contact measurement method is required to perform high-power radio-frequency electric field measurement. The need to develop feedthroughs for radio frequency measurement with high-voltage has increased.On excited wave patterns around the excitation antenna, cold plasma model and actual measurement agree well, qualitatively. However, the existence of equipment in vacuum vessel cause a density distribution associated with these equipment.
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| Academic Significance and Societal Importance of the Research Achievements |
高周波を用いたプラズマ研究は周辺プラズマから核融合プラズマまで幅広く行われている。特にプラズマ点火や維持のために高周波を用いたプラズマ加熱に焦点が充てられ研究されているが、プラズマ周辺部の低密度域におけるプラズマ壁相互作用や低密度域における非伝搬領域での電磁波の伝搬が観測されていた。今回の研究で電磁波の伝搬としては冷たいプラズマモデルで十分なモデル形成が可能であることが分かったが、その反面、計測機器や電磁波励起用アンテナがもたらす密度分布形成のモデル化の重要性が明らかになった。
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Report
(5 results)
Research Products
(6 results)
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[Journal Article] Overview of first Wendelstein 7-X high-performance operation2019
Author(s)
Klinger T.、Andreeva T.、Bozhenkov S.、Brandt C.、Burhenn R.、Fuchert G.、Geiger B.、Grulke O.、Laqua H.P.、Pablant N.、Rahbarnia K.、Stange T.、von Stechow A.、Tamura N.、Thomsen H.、Turkin Y.、Wegner T.、Abramovic I.、Alcuson J.、Aleynikov P.、Alonso A.、Kasahara H.、Kazakov Y.O. et al.
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Journal Title
Nuclear Fusion
Volume: 59
Issue: 11
Pages: 112004-112004
DOI
Related Report
Peer Reviewed / Open Access
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[Journal Article] Plasma termination by excess pellet fueling and impurity injection in TJ-II, the Large Helical Device and Wendelstein 7-X2019
Author(s)
Dinklage A., McCarthy K.J., Suzuki C., Tamura N., Wegner Th., Yamada H., Baldzuhn J., Brunner K.J., Buttenschoen B., Damm H., Drewelow P., Fuchert G., Hirsch M., Hoefel U., Kasahara H., Knauer J., Maier D., Miyazawa J., Motojima G., Oishi T., Rahbarnia K., Sunn Pedersen T., Sakamoto R., Wolf R.C., Zhang D.
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Journal Title
Nuclear Fusion
Volume: 59
Issue: 7
Pages: 076010-076010
DOI
Related Report
Peer Reviewed / Int'l Joint Research
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