Validation of gyrokinetic modelling of light impurity transport including rotation in ASDEX Upgrade

被引：51

作者：

Casson, F. J. ^{[1
]}

McDermott, R. M. ^{[1
]}

Angioni, C. ^{[1
]}

Camenen, Y. ^{[2
]}

Dux, R. ^{[1
]}

Fable, E. ^{[1
]}

Fischer, R. ^{[1
]}

Geiger, B. ^{[1
]}

Manas, P. ^{[2
]}

Menchero, L. ^{[1
,3
]}

Tardini, G. ^{[1
]}

机构：

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

[2] Aix Marseille Univ, CNRS, PIIM UMR 7345, F-13397 Marseille, France

[3] Univ Strathclyde, Dept Phys, ADAS, Glasgow G4 0NG, Lanark, Scotland

来源：

NUCLEAR FUSION | 2013年 / 53卷 / 06期

基金：

欧盟地平线“2020”;

关键词：

TURBULENCE; TOKAMAK; CODE; SIMULATIONS; PARTICLE;

D O I：

10.1088/0029-5515/53/6/063026

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：

Upgraded spectroscopic hardware and an improved impurity concentration calculation allow accurate determination of boron density in the ASDEX Upgrade tokamak. A database of boron measurements is compared to quasilinear and nonlinear gyrokinetic simulations including Coriolis and centrifugal rotational effects over a range of H-mode plasma regimes. The peaking of the measured boron profiles shows a strong anti-correlation with the plasma rotation gradient, via a relationship explained and reproduced by the theory. It is demonstrated that the rotodiffusive impurity flux driven by the rotation gradient is required for the modelling to reproduce the hollow boron profiles at higher rotation gradients. The nonlinear simulations validate the quasilinear approach, and, with the addition of perpendicular flow shear, demonstrate that each symmetry breaking mechanism that causes momentum transport also couples to rotodiffusion. At lower rotation gradients, the parallel compressive convection is required to match the most peaked boron profiles. The sensitivities of both datasets to possible errors is investigated, and quantitative agreement is found within the estimated uncertainties. The approach used can be considered a template for mitigating uncertainty in quantitative comparisons between simulation and experiment.

引用

页数：15

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