Self-organized criticality in MHD driven plasma edge turbulence

被引：6

作者：

dos Santos Lima, G. Z. ^{[1
]}

Iarosz, K. C. ^{[2
]}

Batista, A. M. ^{[2
]}

Caldas, I. L. ^{[3
]}

Guimaraes-Filho, Z. O. ^{[4
]}

Viana, R. L. ^{[5
]}

Lopes, S. R. ^{[5
]}

Nascimento, I. C. ^{[3
]}

Kuznetsov, Yu K. ^{[3
]}

机构：

[1] Univ Fed Rio Grande do Norte, Escola Ciencias & Tecnol, BR-59014615 Natal, RN, Brazil

[2] Univ Estadual Ponta Grossa, Programa Posgrad Fis, BR-84030900 Ponta Grossa, PR, Brazil

[3] Univ Sao Paulo, Inst Fis, BR-05508090 Sao Paulo, Brazil

[4] Univ Aix Marseille 1, IIFS PIIM, F-13331 Marseille 3, France

[5] Univ Fed Parana, Dept Fis, BR-81531990 Curitiba, Parana, Brazil

来源：

PHYSICS LETTERS A | 2012年 / 376卷 / 05期

基金：

巴西圣保罗研究基金会;

关键词：

Plasma; Turbulence; Self-organized criticality; MHD activity; MAGNETICALLY CONFINED PLASMAS; TCABR TOKAMAK; TRANSPORT; MODEL; RECURRENCE; ELECTRODE; PARADIGM; DYNAMICS;

D O I：

10.1016/j.physleta.2011.12.026

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We analyze long-range time correlations and self-similar characteristics of the electrostatic turbulence at the plasma edge and scrape-off layer in the Tokamak Chauffage Alfven Bresillien (TCABR), with low and high Magnetohydrodynamics (MHD) activity. We find evidence of self-organized criticality (SOC), mainly in the region near the tokamak limiter. Comparative analyses of data before and during the MHD activity reveals that during the high mHD activity the Hurst parameter decreases. Finally, we present a cellular automaton whose parameters are adjusted to simulate the analyzed turbulence SOC change with the MHD activity variation. (C) 2011 Published by Elsevier B.V.

引用

页码：753 / 757

页数：5

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