Pulsed plasma heat flow to tungsten material surface and its effect on melting and evaporation
| Project/Area Number |
26420855
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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 | Aichi Institute of Technology |
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Principal Investigator |
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| Co-Investigator(Kenkyū-buntansha) |
上杉 喜彦 金沢大学, 電子情報学系, 教授 (90213339)
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| Co-Investigator(Renkei-kenkyūsha) |
OHNO Noriyasu 名古屋大学, 工学研究科, 教授 (60203890)
KAJITA Shin 名古屋大学, エコトピア科学研究所, 准教授 (00455297)
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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 |
¥4,940,000 (Direct Cost: ¥3,800,000、Indirect Cost: ¥1,140,000)
Fiscal Year 2016: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000)
Fiscal Year 2015: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Fiscal Year 2014: ¥2,600,000 (Direct Cost: ¥2,000,000、Indirect Cost: ¥600,000)
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| Keywords | プラズマ・核融合 / プラズマ対向壁 / タングステン材料 / プラズマ熱負荷 / プラズマ運動量流入 / 繊維状ナノ構造 / 溶融・蒸発 / 高融点金属表面の皺構造出現 / ダイバータ / タングステン / 希ガス / 高融点添加物 / プラズマ運動量注入 / ナノ皺構造 / 溶融 / 蒸発 / 重水素 / 運動量注入 |
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| Outline of Final Research Achievements |
Melting, evaporation and tungsten atomic invasion into deuterium plasmas have been investigated by reaching 3000 degree C at tungsten surface with plasma heat pulse. Concerning the plasma heat flow to the surface, power transmission factor was studied in the experiment as well as numerical analysis, clarifying the importance of thermo-electron emission from the tungsten surfaces and a change in ion energy reflection coefficient due to its surface morphology. On the other hand, plasma momentum input to plasma-facing material surface was observed experimentally, and the analytical formulation was given. In addition, physical mechanism for fiber-form nanostructure formation on refractory metal surfaces are discussed in terms of shear modulus of metals containing helium atoms as a function of surface temperature and a mobility of helium atoms in metals.
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Report
(4 results)
Research Products
(43 results)
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[Journal Article] Molecular dynamics and Monte Carlo hybrid simulation for fuzzy tungsten nanostructure formation2015
Author(s)
A.M. Ito, A. Takamyama, Y. Oda, T. Tamura, R. Kobayashi, T. Hattori, S. Ogata, N. Ohno, S. Kajita, M. Yajima, Y. Nojiri, Y. Yoshimoto, S. Saito, S. Takamura, T. Murashima, M. Miyamoto, H. Nakamura
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Journal Title
Nuclear Fusion
Volume: 55
Issue: 7
Pages: 073013-073013
DOI
Related Report
Peer Reviewed
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[Journal Article] Hybrid simulation research on formation mechanism of tungsten nanostructure induced by helium plasma irradiation2015
Author(s)
A. M. Ito, A. Takayama, Y. Oda, T. Tamura, R. Kobayashi, T. Hattori, S. Ogata, N. Ohno, S. Kajita, M. Yajima, Y. Noiri, Y. Yoshimoto, S. Saito, S. Takamura, T. Murashima, M. Miyamoto, and H. Nakamura
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Journal Title
Journal of Nuclear Material
Volume: 印刷中
Pages: 109-115
DOI
Related Report
Peer Reviewed / Acknowledgement Compliant
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[Presentation] Microwrinkle Structures on Refractory Metal Surfaces irradiated by Noble Gass Plasmas2016
Author(s)
S. Takamura, Y. Uesugi, M. Yajima, A.M. Ito, T. Kobayashi, S. Maenaka, K. Yamada, K. Fujita
Organizer
IAEA-FEC 2016, PDP-7
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] Molecular dynamics and Monte-Carlo hybrid simulation for fuzzy tungsten nanostructure formation2014
Author(s)
Ito, Atsushi; Takayama, Arimichi; Oda, Yasuhiro; Tamura, Tomoyuki; Kobayashi, Ryo; Hattori, Tatsunori; Ogata, Shuji; Ohno, Noriyasu; Kajita, Shin; Yajima, Miyuki; Noiri, Yasuyuki; Yoshimoto, Yoshihide; Saito, Seiki; Takamura, Shuichi; Murashima, Takahiro; Miyamoto, M; Nakamura, Hiroaki,
Organizer
25th Fusion Energy Conference
Place of Presentation
Saint Petersburg, Russia
Year and Date
2014-10-13 – 2014-10-18
Related Report
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[Presentation] Molecular dynamics research on formation mechnism of tungsten nanostructure induced by helium plasma irradiation2014
Author(s)
A.M. Ito, A. Takayama, Y. Oda, T. Tamura, R. Kobayashi, T. Hattori, S. Ogata, N. Ohno, S. Kajita, M. Yajima, Y. Noiri, Y. Yoshimoto, S. Saito, S. Takamura and H. Nakamura
Organizer
21st International Conference on Plasma Surface Intractions in Controlled Fusion Devices
Place of Presentation
Kanazawa, Japan
Year and Date
2014-05-26 – 2014-05-30
Related Report
Invited
