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
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
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.
WANG Wen-Hao;YU Chang-Xuan;WEN Yi-Zhi;XU Yu-Hong;LING Bi-Li;GONG Xian-Zu; LIU Bao-Hua;WAN Bao-Nian. A Signature of Self-Organized Criticality in the HT-6M Edge Plasma Turbulence[J]. 中国物理快报, 2001, 18(3): 396-398.
WANG Wen-Hao, YU Chang-Xuan, WEN Yi-Zhi, XU Yu-Hong, LING Bi-Li, GONG Xian-Zu, LIU Bao-Hua, WAN Bao-Nian. A Signature of Self-Organized Criticality in the HT-6M Edge Plasma Turbulence. Chin. Phys. Lett., 2001, 18(3): 396-398.
YANG Qing-Wei;ZHOU Hang-Yu;FENG Bei-Bin;LIU Yi;PAN Yu-Dong;LI Wei;DUAN Xu-Ru;CHEN Wei;CUI Zheng-Ying;JI Xiao-Quan;DING Xuan-Tong;HL-A team. A New Criterion for Disruption Prediction on HL-2A[J]. 中国物理快报, 2006, 23(4): 891-894.
2001, Vol. 18 
