Angular momentum transport modeling: achievements of a gyrokinetic quasi-linear approach

P. Cottier (1) , C. Bourdelle (1) , Y. Camenen (2) , Özgür D. Gürcan (3) , F.J. Casson (4) , Xavier Garbet (5) , P. Hennequin (3) , T. Tala (6)

1 IRFM - Institut de Recherche sur la Fusion par confinement Magnétique
2 PIIM - Physique des interactions ioniques et moléculaires
3 LPP - Laboratoire de Physique des Plasmas
4 IPP - Max-Planck-Institut für Plasmaphysik [Garching]
5 CEA/DSM/DRFC - Association EURATOM-CEA
6 Technical Research Centre of Finland

QuaLiKiz, a model based on a local gyrokinetic eigenvalue solver is expanded to include momentum flux modeling in addition to heat and particle fluxes. Essential for accurate momentum flux predictions, the parallel asymmetrization of the eigenfunctions is successfully recovered by an analytical fluid model. This is tested against self-consistent gyrokinetic calculations and allows for a correct prediction of the E×B shear impact on the saturated potential amplitude by means of a mixing length rule. Hence, the effect of the E×B shear is recovered on all the transport channels including the induced residual stress. Including these additions, QuaLiKiz remains ∼10 000 faster than non-linear gyrokinetic codes allowing for comparisons with experiments without resorting to high performance computing. The example is given of momentum pinch calculations in NBI modulation experiments.

Domaines: Physique des plasmas [physics.plasm-ph]

P. Cottier, C. Bourdelle, Y. Camenen, Özgür D. Gürcan, F.J. Casson, et al.. Angular momentum transport modeling: achievements of a gyrokinetic quasi-linear approach. Plasma Physics and Controlled Fusion, 2013, 56, pp.015011. ⟨10.1088/0741-3335/56/1/015011⟩. ⟨hal-00926719⟩