2016 Fiscal Year Final Research Report
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(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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| 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 |
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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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| Free Research Field |
磁場閉じ込め核融合におけるプラズマ‐壁相互作用
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