Electron temperature gradient driven turbulence

被引：939

作者：

Jenko, F ^{[1
]}

Dorland, W ^{[1
]}

Kotschenreuther, M ^{[1
]}

Rogers, BN ^{[1
]}

机构：

[1] EURATOM, Max Planck Inst Plasmaphys, D-85748 Garching, Germany

来源：

PHYSICS OF PLASMAS | 2000年 / 7卷 / 05期

关键词：

D O I：

10.1063/1.874014

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：

Collisionless electron-temperature-gradient-driven (ETG) turbulence in toroidal geometry is studied via nonlinear numerical simulations. To this aim, two massively parallel, fully gyrokinetic Vlasov codes are used, both including electromagnetic effects. Somewhat surprisingly, and unlike in the analogous case of ion-temperature-gradient-driven (ITG) turbulence, we find that the turbulent electron heat flux is significantly underpredicted by simple mixing length estimates in a certain parameter regime ((s) over cap similar to 1, low alpha). This observation is directly linked to the presence of radially highly elongated vortices ("streamers") which lead to very effective cross-field transport. The simulations therefore indicate that ETG turbulence is likely to be relevant to magnetic confinement fusion experiments. (C) 2000 American Institute of Physics. [S1070-664X(00)95905-6].

引用

页码：1904 / 1910

页数：7

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