Chin. Phys. Lett.  2001, Vol. 18 Issue (3): 396-398    DOI:
Original Articles |
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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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.
Keywords: 52.40.Hf      52.25.Gj      52.55.Fa     
Published: 01 March 2001
PACS:  52.40.Hf (Plasma-material interactions; boundary layer effects)  
  52.25.Gj (Fluctuation and chaos phenomena)  
  52.55.Fa (Tokamaks, spherical tokamaks)  
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https://cpl.iphy.ac.cn/       OR      https://cpl.iphy.ac.cn/Y2001/V18/I3/0396
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WANG Wen-Hao
YU Chang-Xuan
WEN Yi-Zhi
XU Yu-Hong
LING Bi-Li
GONG Xian-Zu
LIU Bao-Hua
WAN Bao-Nian
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