A signature of self-organized criticality in the HT-6M edge plasma turbulence

被引:10
作者
Wang, WH [1 ]
Yu, CX
Wen, YZ
Xu, YH
Ling, BL
Gong, XZ
Liu, BH
Wan, BN
机构
[1] Univ Sci & Technol China, Dept Modern Phys, Hefei 230027, Peoples R China
[2] Chinese Acad Sci, Inst Plasma Phys, Hefei 230031, Peoples R China
关键词
D O I
10.1088/0256-307X/18/3/329
中图分类号
O4 [物理学];
学科分类号
0702 ;
摘要
Power spectra of electron density and Boating potential fluctuations in the velocity shear layer of the HT-GM 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 how 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 ill the HT-GM tokamak evolving into a critical state independent of local plasma parameters.
引用
收藏
页码:396 / 398
页数:3
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