Experimental evidence for self-organized criticality in tokamak plasma turbulence

被引：54

作者：

Rhodes, TL ^{[1
]}

Moyer, RA ^{[1
]}

Groebner, R ^{[1
]}

Doyle, EJ ^{[1
]}

Lehmer, R ^{[1
]}

Peebles, WA ^{[1
]}

Rettig, CL ^{[1
]}

机构：

[1] Univ Calif Los Angeles, Inst Plasma & Fus Res, Los Angeles, CA 90095 USA

来源：

PHYSICS LETTERS A | 1999年 / 253卷 / 3-4期

关键词：

plasma; turbulence; turbulent transport; self-organized criticality; self-similarity;

D O I：

10.1016/S0375-9601(99)00034-1

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Measurements of plasma turbulence spectra and particle flux from the DIII-D tokamak exhibit significant agreement with predictions of self-organized criticality (SOC) modeling. Power spectra of density (n) over tilde, potential <(phi)over tilde>, and particle flux Gamma, are observed to have three regions of frequency dependence: f(0), f(-1) and f(-4). In addition, the particle flux probability distribution displays a Gamma(-1) scaling over two decades in Gamma. These results provide the first evidence that the plasma is in a state consistent with SOC models and place a constraint on plasma transport models. (C) 1999 Elsevier Science B.V.

引用

页码：181 / 186

页数：6

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