2012 Fiscal Year Final Research Report
In-situ measurement of dynamic hydrogen isotope retention under plasma exposure by using ion beam analysis
| Project/Area Number |
23656573
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| Research Category |
Grant-in-Aid for Challenging Exploratory Research
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| Allocation Type | Multi-year Fund |
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| Research Field |
Nuclear fusion studies
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| Research Institution | Nagoya University |
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Principal Investigator |
OHNO Noriyasu 名古屋大学, 工学研究科, 教授 (60203890)
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| Co-Investigator(Kenkyū-buntansha) |
MATSUNAMI Noriaki 名古屋大学, エコトピア科学研究所, 准教授 (70109304)
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| Project Period (FY) |
2011 – 2012
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| Keywords | 核融合 / 水素吸蔵 / イオンビーム解析 / プラズマ / その場計測 |
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| Research Abstract |
Control of hydrogen isotope retention in plasma-facing components (PFC) is essential to establish steady-state operation. Understanding of dynamic behavior of hydrogen isotope retention in PFC is quite important related to optimization of the timing of fueling and flux dependence of chemical sputtering, and so on. However, these phenomena have not been understood yet, primarily due to the lack of proper plasma-surface analyses under plasma exposure. In this study, we have investigated deuterium retention in graphite under and after plasma exposure by using a device of PS-DIBA (Plasma Surface Dynamics with Ion Beam Analysis), which makes it possible to carry out in-situ ion beam analysis of deuterium retention. We have clearly observed the dynamics retention in graphite material under deuterium plasma exposure, and analyzed the release time of dynamically retained deuterium particles depending on the deuterium ion flux. We also investigated dynamic behavior of hydrogen isotope exchange between deuterium and hydrogen species.
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Research Products
(16 results)
