Experimental evidence of coupling between local turbulent transport and large scale fluctuations in the ISTTOK edge plasma

被引：19

作者：

Silva, C. ^{[1
]}

Hidalgo, C. ^{[2
]}

Figueiredo, H. ^{[1
]}

Duarte, P. ^{[1
]}

Fernandes, H. ^{[1
]}

Nedzelskiy, I. ^{[1
]}

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

机构：

[1] Univ Tecn Lisboa, EURATOM Assoc, Inst Plasma & Fus Nucl, Inst Super Tecn, P-1049001 Lisbon, Portugal

[2] CIEMAT, EURATOM Assoc, E-28040 Madrid, Spain

来源：

PHYSICS OF PLASMAS | 2008年 / 15卷 / 12期

关键词：

plasma boundary layers; plasma fluctuations; plasma oscillations; plasma turbulence;

D O I：

10.1063/1.3042221

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：

The interplay between large scale fluctuations and the local turbulent transport has been investigated in the tokamak ISTTOK [C. A. F. Varandas , Fusion Technol. 29, 105 (1996)] plasma boundary region. It has been found that the floating potential fluctuations, dominated by low frequency oscillations, exhibit a significant toroidal correlation at large distances that can be attributed to the geodesic acoustic mode. The level of long-distance correlations is strongly bursty, showing a significant degree of coupling with the local electrostatic turbulent transport. Experimental findings show the key role of multiscale physics in the regulation of transport in the edge region of fusion plasmas.

引用

页数：4

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