Origin and turbulence spreading of plasma blobs

被引：60

作者：

Manz, P. ^{[1
,2
]}

Ribeiro, T. T. ^{[2
]}

Scott, B. D. ^{[2
]}

Birkenmeier, G. ^{[1
,2
]}

Carralero, D. ^{[2
]}

Fuchert, G. ^{[3
]}

Mueller, S. H. ^{[2
]}

Mueller, H. W. ^{[2
]}

Stroth, U. ^{[1
,2
]}

Wolfrum, E. ^{[2
]}

机构：

[1] Tech Univ Munich, Phys Dept E28, Garching, Germany

[2] EURATOM, Max Planck Inst Plasmaphys, D-14476 Garching, Germany

[3] Univ Lorraine, CNRS UMR 7198, IJL, F-40239 Vandoeuvre Les Nancy, France

来源：

PHYSICS OF PLASMAS | 2015年 / 22卷 / 02期

关键词：

SCRAPE-OFF LAYER; TRANSPORT; DYNAMICS; EDGE;

D O I：

10.1063/1.4908272

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 formation of plasma blobs is studied by analyzing their trajectories in a gyrofluid simulation in the vicinity of the separatrix. Most blobs arise at the maximum radial electric field outside the separatrix. In general, blob generation is not bound to one particular radial position or instability. A simple model of turbulence spreading for the scrape-off layer is derived. The simulations show that the blob dynamics can be represented by turbulence spreading, which constitutes a substantial energy drive for far scrape-off layer turbulence and is a more suitable quantity to study blob generation compared to the skewness. (C) 2015 AIP Publishing LLC.

引用

页数：6

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