| Project/Area Number |
25630420
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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 | Shimane University |
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Principal Investigator |
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| Co-Investigator(Kenkyū-buntansha) |
TOKITANI Masayuki 核融合科学研究所, ヘリカル研究部, 助教 (30455208)
FUNAKI Shuhei 島根大学, 総合理工学研究科, 助教 (00602880)
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| Project Period (FY) |
2013-04-01 – 2016-03-31
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| Project Status |
Completed (Fiscal Year 2015)
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| Budget Amount *help |
¥3,900,000 (Direct Cost: ¥3,000,000、Indirect Cost: ¥900,000)
Fiscal Year 2015: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000)
Fiscal Year 2014: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000)
Fiscal Year 2013: ¥2,470,000 (Direct Cost: ¥1,900,000、Indirect Cost: ¥570,000)
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| Keywords | プラズマ・壁相互作用 / 表面分析 / 照射損傷 / 不純物堆積 / 透明導電膜 / 微細組織 / ＬＨＤ / LHD / 光反射率スペクトル / インピーダンス / プラズマ表面相互作用 |
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| Outline of Final Research Achievements |
The diagnostics of plasma facing materials (PFMs) is a primary issue for maintenance of the high performance plasma in fusion devices. In this study, optical reflectivity measurement is proposed as a convenient diagnostics method of surface modifications in PFMs and its applicability to a plasma confinement device is evaluated. The dependence of the reflectivity on the amount of the ion-induced damages and the depositions thickness on the near-surface region of the samples was examined from the laboratory experiments. Since the detectable change of the reflectivity was also observed for the samples exposed to the plasmas in LHD, the optical property measurement was considered to be a possible method for convenient in-situ diagnostics for PFMs. The use of the transparent conductive film and the impedance measurement in a high-frequency band were suggested as a more accurate diagnostics method.
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