Particle pinch and collisionality in gyrokinetic simulations of tokamak plasma turbulence

被引：53

作者：

Angioni, C. ^{[1
]}

Candy, J. ^{[2
]}

Fable, E. ^{[3
]}

Maslov, M. ^{[3
]}

Peeters, A. G. ^{[4
]}

Waltz, R. E. ^{[2
]}

Weisen, H. ^{[3
]}

机构：

[1] Max Planck Inst Plasma Phys, EURATOM Assoc, IPP, D-85748 Garching, Germany

[2] Gen Atom Co, San Diego, CA 92121 USA

[3] Ecole Polytech Fed Lausanne, Assoc Euratom Confederat Suisse, Ctr Rech Phys Plasmas, CH-1015 Lausanne, Switzerland

[4] Univ Warwick, Dept Phys, Ctr Fus Space & Astrophys, Coventry CV4 7AL, W Midlands, England

来源：

PHYSICS OF PLASMAS | 2009年 / 16卷 / 06期

基金：

英国工程与自然科学研究理事会;

关键词：

pinch effect; plasma collision processes; plasma simulation; plasma transport processes; plasma turbulence; Tokamak devices; PROFILE PEAKING; DENSITY PEAKING; ASDEX UPGRADE; MODE PLASMAS; TRANSPORT; HEAT;

D O I：

10.1063/1.3155498

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 generic problem of how, in a turbulent plasma, the experimentally relevant conditions of a particle flux very close to the null are achieved, despite the presence of strong heat fluxes, is addressed. Nonlinear gyrokinetic simulations of plasma turbulence in tokamaks reveal a complex dependence of the particle flux as a function of the turbulent spatial scale and of the velocity space as collisionality is increased. At experimental values of collisionality, the particle flux is found close to the null, in agreement with the experiment, due to the balance between inward and outward contributions at small and large scales, respectively. These simulations provide full theoretical support to the prediction of a peaked density profile in a future nuclear fusion reactor.

引用

页数：4

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