Intermittency of the density fluctuations and its influence on the radial transport in the boundary of J-TEXT

doi:10.1088/1674-1056/20/2/025204

Abstract To improve the understanding of the turbulence intermittency, a detailed investigation of the intermittency of the density fluctuations has been performed in the boundary of J-TEXT. The intermittency of the density fluctuations and its influence on the radial transport are reported. The probability distribution functions of the density fluctuations are not scale-invariant, being inconsistent with the self-organized criticality hypothesis. The underlying dynamics of the intermittency are detected using the quiet-time statistical method. The probability distribution function of the quiet times shows double-power-law regions, indicating the existence of correlations between the successive burst events.

Keywords: intermittency radial transport J-TEXT

Received: 17 August 2010
Revised: 06 September 2010
Accepted manuscript online:

PACS:	52.70.Ds	(Electric and magnetic measurements)
	52.25.Gj	(Fluctuation and chaos phenomena)
	52.55.Fa	(Tokamaks, spherical tokamaks)

Fund: Project supported in part by the National Basic Research Program of China (Grant No. 2008CB717805) and the National Natural Science Foundation of China (Grant No. 50907029).

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Zhu Meng-Zhou(朱孟周), Zhuang Ge(庄革), Wang Zhi-Jiang(王之江), and Pan Yuan(潘垣) Intermittency of the density fluctuations and its influence on the radial transport in the boundary of J-TEXT 2011 Chin. Phys. B 20 025204

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Intermittency of the density fluctuations and its influence on the radial transport in the boundary of J-TEXT

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