Validating a quasi-linear transport model versus nonlinear simulations

被引：77

作者：

Casati, A. ^{[1
]}

Bourdelle, C. ^{[1
]}

Garbet, X. ^{[1
]}

Imbeaux, F. ^{[1
]}

Candy, J. ^{[2
]}

Clairet, F. ^{[1
]}

Dif-Pradalier, G. ^{[1
]}

Falchetto, G. ^{[1
]}

Gerbaud, T. ^{[1
]}

Grandgirard, V. ^{[1
]}

Guercan, Oe. D. ^{[3
]}

Hennequin, P. ^{[3
]}

Kinsey, J. ^{[2
]}

Ottaviani, M. ^{[1
]}

Sabot, R. ^{[1
]}

Sarazin, Y. ^{[1
]}

Vermare, L. ^{[3
]}

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

机构：

[1] IRFM, CEA, F-13108 St Paul Les Durance, France

[2] Gen Atom Co, San Diego, CA 92186 USA

[3] Ecole Polytech, CNRS, Lab Phys Plasmas, F-91128 Palaiseau, France

来源：

NUCLEAR FUSION | 2009年 / 49卷 / 08期

关键词：

STRONG PLASMA TURBULENCE; TORE-SUPRA; PARTICLE-TRANSPORT; STATISTICAL THEORY; SCALING LAWS; CONFINEMENT; EQUATIONS; TOKAMAKS;

D O I：

10.1088/0029-5515/49/8/085012

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：

In order to gain reliable predictions on turbulent fluxes in tokamak plasmas, physics based transport models are required. Nonlinear gyrokinetic electromagnetic simulations for all species are still too costly in terms of computing time. On the other hand, interestingly, the quasi-linear approximation seems to retain the relevant physics for fairly reproducing both experimental results and nonlinear gyrokinetic simulations. Quasi-linear fluxes are made of two parts: (1) the quasi-linear response of the transported quantities and (2) the saturated fluctuating electrostatic potential. The first one is shown to follow well nonlinear numerical predictions; the second one is based on both nonlinear simulations and turbulence measurements. The resulting quasi-linear fluxes computed by QuaLiKiz (Bourdelle et al 2007 Phys. Plasmas 14 112501) are shown to agree with the nonlinear predictions when varying various dimensionless parameters, such as the temperature gradients, the ion to electron temperature ratio, the dimensionless collisionality, the effective charge and ranging from ion temperature gradient to trapped electron modes turbulence.

引用

页数：10

共 46 条

[1] Collisionality dependence of density peaking in quasilinear gyrokinetic calculations [J].