A Signature of Self-Organized Criticality in the HT-6M Edge Plasma Turbulence  

作　　者：WANG Wen-Hao YU Chang-Xuan WEN Yi-Zhi XU Yu-Hong LING Bi-Li GONG Xian-Zu LIU Bao-Hua WAN Bao-Nian 王文浩;俞昌旋;闻一之;许宇鸿;凌必利;龚先祖;刘保华;万宝年(Department of Modern Physics,University of Science and Technology of China,Hefei 230027;Institute of Plasma Physics,Chinese Academy of Sciences,Hefei 230031)

机构地区：[1]Department of Modern Physics,University of Science and Technology of China,Hefei 230027 [2]Institute of Plasma Physics,Chinese Academy of Sciences,Hefei 230031

出　　处：《Chinese Physics Letters》2001年第3期396-398,共3页中国物理快报（英文版）

基　　金：Sponsored by the National Natural Science Foundation of China under Grant Nos.19675036 and 19635020;the Research Fund for the Doctoral Programme of Higher Education under Grant No.1999035809;the Chinese Academy of China.

摘　　要：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.

关 键 词：SIGNATURE PLASMA TURBULENCE 

分 类 号：TL6[核科学技术—核技术及应用]