| Original Articles |
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A Signature of Self-Organized Criticality in the HT-6M Edge Plasma Turbulence |
| WANG Wen-Hao1;YU Chang-Xuan1;WEN Yi-Zhi1;XU Yu-Hong2;LING Bi-Li2;GONG Xian-Zu2; LIU Bao-Hua2;WAN Bao-Nian2 |
| 1Department of Modern Physics, University of Science and Technology of China, Hefei 230027
2Institute of Plasma Physics, Chinese Academy of Sciences, Hefei 230031
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| Cite this article: |
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WANG Wen-Hao, YU Chang-Xuan, WEN Yi-Zhi et al 2001 Chin. Phys. Lett. 18 396-398 |
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Abstract Power spectra of electron density and floating potential fluctuations in the velocity shear layer of the HT-6M edge region have been measured and analysed. All the spectra have three distinct frequency regions with the spectral decay indices typical of self-organized criticality systems (0, -1 and -4) when Doppler shift effects induced by the plasma E x B flow velocity have been taken into account. These results are consistent with the predictions of the self-organized criticality models, which may be an indication of edge plasma turbulence in the HT-6M tokamak evolving into a critical state independent of local plasma parameters.
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| Keywords:
52.40.Hf
52.25.Gj
52.55.Fa
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Published: 01 March 2001
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| PACS: |
52.40.Hf
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(Plasma-material interactions; boundary layer effects)
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52.25.Gj
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(Fluctuation and chaos phenomena)
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52.55.Fa
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(Tokamaks, spherical tokamaks)
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