| Observation of intermittency in edge plasma of SUNIST tokamak |
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| 作者姓名： | 王文浩 何也熙 高喆 曾立 张国平 解丽凤 冯春华 |
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| 作者单位： | Department of Engineering Physics, Tsinghua University, Beijing 100084, China;Department of Engineering Physics, Tsinghua University, Beijing 100084, China;Department of Engineering Physics, Tsinghua University, Beijing 100084, China;Department of Engineering Physics, Tsinghua University, Beijing 100084, China;Department of Engineering Physics, Tsinghua University, Beijing 100084, China;Department of Engineering Physics, Tsinghua University, Beijing 100084, China;Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100080, China |
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| 基金项目： | Project supported by the National Natura1 Science Foundation of China (Grants Nos 10275041, 10235010 and 10375089) and by China Postdoctoral Science Foundation. |
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| 摘 要： | The temporal intermittency of the fluctuation-driven particle transport fluxes is analysed by using data obtained from Langmuir probe array in the edge of the Sino-United Spherical Tokamak (SUNIST). The conditional statistics analysis indicates that the intermittent structures have a characteristic time width of about 30μs, which is the typical fluctuation time scaling. It is also found that the transport fluxes have a multifractal character over the fluctuation time scales, and exhibit a long-time-range correlation character with self-similar parameter H>0.5 in the plasma confinement time scales. Furthermore, the analyses show that the level of the intermittency and the long-range correlation of the fluxes vary with increasing plasma density. These observations are consistent with the prediction of the avalanche-like model.
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| 关 键 词： | 间歇性 球形托卡马克装置 等离子体 激震传输 |
| 收稿时间： | 2004-06-21 |
Observation of intermittency in edge plasma of SUNIST tokamak |
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| Wang Wen-Hao,He Ye-Xi,Gao Zhe,Zeng Li,Zhang Guo-Ping,Xie Li-Feng and Feng Chun-Hua.Observation of intermittency in edge plasma of SUNIST tokamak[J].Chinese Physics B,2004,13(12):2091-2096. |
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| Authors: | Wang Wen-Hao He Ye-Xi Gao Zhe Zeng Li Zhang Guo-Ping Xie Li-Feng and Feng Chun-Hua |
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| Institution: | Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100080, China; Department of Engineering Physics, Tsinghua University, Beijing 100084, China |
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| Abstract: | The temporal intermittency of the fluctuation-driven particle transport fluxes is analysed by using data obtained from Langmuir probe array in the edge of the Sino-United Spherical Tokamak (SUNIST). The conditional statistics analysis indicates that the intermittent structures have a characteristic time width of about 30μs, which is the typical fluctuation time scaling. It is also found that the transport fluxes have a multifractal character over the fluctuation time scales, and exhibit a long-time-range correlation character with self-similar parameter H>0.5 in the plasma confinement time scales. Furthermore, the analyses show that the level of the intermittency and the long-range correlation of the fluxes vary with increasing plasma density. These observations are consistent with the prediction of the avalanche-like model. |
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| Keywords: | intermittency spherical tokamak edge plasma turbulence transport |
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