2014 Fiscal Year Final Research Report
Experimental study on statistical properties of intermittent electron flux in an ECR plasma
| Project/Area Number |
24540544
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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 |
Plasma science
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| Research Institution | National Institute for Fusion Science |
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Principal Investigator |
YOSHIMURA Shinji 核融合科学研究所, ヘリカル研究部, 助教 (50311204)
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| Co-Investigator(Kenkyū-buntansha) |
TERASAKA Kenichiro 九州大学, 総合理工学研究院, 助教 (50597127)
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| Project Period (FY) |
2012-04-01 – 2015-03-31
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| Keywords | ECRプラズマ / 間欠性 / 電子流束 / 浮遊電位揺動 / 統計解析 / ポアソン過程 / 2次元分布計測 |
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| Outline of Final Research Achievements |
Plasmas exhibit various intermittent behaviors, where the words “intermittent behaviors” indicate irregularly repeated abrupt changes of the plasma. We have observed an intermittent increase of local electron temperature in a laboratory cylindrical plasma. Electrical and optical 2D measurements and statistical analyses have revealed that the region of electron temperature increase has a finite size of about 1/10 of the plasma diameter and the phenomenon is characterized by a stationary Poisson process, which is a random process that the occurrence probability is constant over whole period of time.
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| Free Research Field |
プラズマ理工学
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