| Original Articles |
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Self-Organized Criticality Properties of the Turbulence-Induced
Particle Flux at the Plasma Edge of the HT-6M Tokamak
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| 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. 18 793-795 |
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Abstract Power spectrum and the probability distribution function (PDF) of the turbulence-induced particle flux Γ in the velocity shear layer of the HT-6M edge region have been measured and analysed. Three regions of frequency dependence (f0, f-1, f-4) have been observed in the spectrum of the flux. The PDF of the flux displays a Γ-1 scaling over one decade in Γ. Using the rescaled-range statistical technique, we find that the degree of the self-similarity (Hurst exponent) of the particle flux in the measured region ranges from 0.64 to 0.83. All of these results may mean that the plasma transport is in a state characterized by the self-organized criticality.
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| Keywords:
52.40.Hf
52.25.Gj
52.55.Fa
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Published: 01 June 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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