Generation of Intermittent Turbulent Events at the Transition from Closed to Open Field Lines in a Toroidal Plasma

被引：41

作者：

Happel, T. ^{[1
]}

Greiner, F. ^{[3
]}

Mahdizadeh, N. ^{[4
]}

Nold, B. ^{[2
]}

Ramisch, M. ^{[2
]}

Stroth, U. ^{[2
]}

机构：

[1] Asociac EURATOM CIEMAT, Lab Nacl Fus, Madrid, Spain

[2] Univ Stuttgart, Inst Plasmaforsch, D-70569 Stuttgart, Germany

[3] Univ Kiel, IEAP, D-24098 Kiel, Germany

[4] ABB Switzerland Ltd Corp Res, CH-5405 Baden, Switzerland

来源：

PHYSICAL REVIEW LETTERS | 2009年 / 102卷 / 25期

关键词：

SCRAPE-OFF LAYER; LOW-TEMPERATURE PLASMA; TORSATRON TJ-K; EDGE TURBULENCE; TRANSPORT; FLUCTUATIONS; STELLARATOR; TOKAMAK; DEVICES; WAKE;

D O I：

10.1103/PhysRevLett.102.255001

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Turbulent transport at the transition from closed to open field lines has been investigated in the stellarator experiment TJ-K. It is found that drift-wave turbulence in the confined region is responsible for the generation of intermittent structures (so-called blobs) in the unconfined region. There the character of turbulence changes and a decoupling of density and potential fluctuations is observed. The poloidal propagation of the intermittent events can be understood in the framework of background flows caused by gradients in the equilibrium plasma pressure and potential profiles.

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页数：4

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