Multiscale coherent structures in tokamak plasma turbulence
文献类型：期刊论文
| 作者 | Xu, GS ; Wan, BN ; Zhang, W ; Yang, QW ; Wang, L ; Wen, YZ |
| 刊名 | PHYSICS OF PLASMAS
 |
| 出版日期 | 2006 |
| 卷号 | 13期号:10 |
| 关键词 | SELF-ORGANIZED CRITICALITY MAGNETICALLY CONFINED PLASMAS STANDARD TRANSPORT PARADIGM LONG-RANGE CORRELATIONS SCRAPE-OFF LAYER C-MOD TOKAMAK EDGE TURBULENCE TIME CORRELATIONS FLUCTUATIONS INTERMITTENCY |
| ISSN号 | 1070-664X |
| 通讯作者 | Xu, GS: Chinese Acad Sci, Inst Plasma Phys, Hefei 230031, Peoples R China. |
| 中文摘要 | A 12-tip poloidal probe array is used on the HT-7 superconducting tokamak [Li, Wan, and Mao, Plasma Phys. Controlled Fusion 42, 135 (2000)] to measure plasma turbulence in the edge region. Some statistical analysis techniques are used to characterize the turbulence structures. It is found that the plasma turbulence is composed of multiscale coherent structures, i.e., turbulent eddies and there is self-similarity in a relative short scale range. The presence of the self-similarity is found due to the structural similarity of these eddies between different scales. These turbulent eddies constitute the basic convection cells, so the self-similar range is just the dominant scale range relevant to transport. The experimental results also indicate that the plasma turbulence is dominated by low-frequency and long-wavelength fluctuation components and its dispersion relation shows typical electron-drift-wave characteristics. Some large-scale coherent structures intermittently burst out and exhibit a very long poloidal extent, even longer than 6 cm. It is found that these large-scale coherent structures are mainly contributed by the low-frequency and long-wavelength fluctuating components and their presence is responsible for the observations of long-range correlations, i.e., the correlation in the scale range much longer than the turbulence decorrelation scale. These experimental observations suggest that the coexistence of multiscale coherent structures results in the self-similar turbulent state. (c) 2006 American Institute of Physics. |
| 收录类别 | SCI |
| 语种 | 英语 |
| 公开日期 | 2013-09-18 |
| 源URL | [http://ir.iphy.ac.cn/handle/311004/42424]  |
| 专题 | 物理研究所_物理所公开发表论文_物理所公开发表论文_期刊论文 |
| 推荐引用方式 GB/T 7714 | Xu, GS,Wan, BN,Zhang, W,et al. Multiscale coherent structures in tokamak plasma turbulence[J]. PHYSICS OF PLASMAS,2006,13(10). |
| APA | Xu, GS,Wan, BN,Zhang, W,Yang, QW,Wang, L,&Wen, YZ.(2006).Multiscale coherent structures in tokamak plasma turbulence.PHYSICS OF PLASMAS,13(10). |
| MLA | Xu, GS,et al."Multiscale coherent structures in tokamak plasma turbulence".PHYSICS OF PLASMAS 13.10(2006). |
入库方式： OAI收割
来源：物理研究所
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