On the validity of the local diffusive paradigm in turbulent plasma transport

被引：157

作者：

Dif-Pradalier, G. ^{[1
]}

Diamond, P. H. ^{[1
]}

Grandgirard, V. ^{[2
]}

Sarazin, Y. ^{[2
]}

Abiteboul, J. ^{[2
]}

Garbet, X. ^{[2
]}

Ghendrih, Ph. ^{[2
]}

Strugarek, A. ^{[2
]}

Ku, S. ^{[3
]}

Chang, C. S. ^{[3
]}

机构：

[1] Univ Calif San Diego, Ctr Astrophys & Space Sci, La Jolla, CA 92093 USA

[2] IRFM, CEA, F-13108 St Paul Les Durance, France

[3] NYU, Courant Inst Math Sci, New York, NY 10012 USA

来源：

PHYSICAL REVIEW E | 2010年 / 82卷 / 02期

基金：

新加坡国家研究基金会;

关键词：

DIII-D; DYNAMICS; ENERGY;

D O I：

10.1103/PhysRevE.82.025401

中图分类号：

O35 [流体力学]; O53 [等离子体物理学];

学科分类号：

070204 ; 080103 ; 080704 ;

摘要：

A systematic, constructive and self-consistent procedure to quantify nonlocal, nondiffusive action at a distance in plasma turbulence is exposed and applied to turbulent heat fluxes computed from the state-of-the-art full-f, flux-driven gyrokinetic GYSELA and XGC1 codes. A striking commonality is found: heat transport below a dynamically selected mesoscale has the structure of a Levy distribution, is strongly nonlocal, nondiffusive, scale-free, and avalanche mediated; at larger scales, we report the observation of a self-organized flow structure which we call the "EXB staircase" after its planetary analog.

引用

页数：4

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