Brunner, S.

Camenen, Y.

Dannert, T.

Lapillonne, X.

Marinoni, A.

Pochelon, A.

Sauter, O.

Villard, L.

Infoscience - École polytechnique fédérale de Lausanne

Gyrokinetic simulations of shaping effects on turbulent heatand particle transport observed on the TCV tokamakX. Lapillonne, T. Dannert, O. Sauter, A. Marinoni, Y. Camenen,A. Pochelon, L. Villard and S. BrunnerEcole Polytechnique Fe´de´rale de Lausanne (EPFL)Centre de Recherches en Physique des PlasmasAssociation Euratom-Confe´de´ration SuisseCH-1015 Lausanne, SwitzerlandExperimental results from the ”Tokamak a` Configuration Variable ” (TCV) experiment[1, 2] have shown a heat transport coefficient χe two times greater with a triangularityδ = +0.4 than in a case with δ = −0.4 in L-mode plasma. These results were themotivation for a systematic study of shaping effects, and especially triangularity, onturbulent transport using the flux-tube gyrokinetic code GENE [3, 4]. In order to enablesimulations of realistic tokamak plasma conditions and geometry, the code is extendedfrom the s-alpha approximation to general axisymmetric geometry using an interface withan ideal MHD equilibrium code, CHEASE [5].In a second stage the code will be used to compare numerical results with experimentaldata from Electron Internal Transport Barriers (eITBs) studies conducted at TCV in afully non-inductive discharge. The relative importance of Trapped Electron Modes andElectron Temperature Gradient modes will be investigated. The current status of thiswork will be presented.References[1] Y. Camenen and A. Pochelon, et al., Plasma Phys. Control. Fusion, 47 (2005) 1971.[2] Y. Camenen and A. Pochelon, et al., to be published in Nuclear Fusion, Impact ofplasma triangularity and collisionality on electron heat transport in TCV L-modeplasmas.[3] F. Jenko, W. Dorland, M. Kotschenreuther, and B.N. Rogers, Phys. Plasmas, 7 (2000)1904.[4] T. Dannert and F. Jenko ,Phys. Plasmas , 12 (2005) 1.[5] H. Lu¨tjens, A. Bondeson, and O. Sauter, Comp. Phys. Com. , 97 (1996) 219.

Gyrokinetic simulations of shaping effects on turbulent heat and particle transport observed on the TCV tokamak

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Gyrokinetic simulations of shaping effects on turbulent heat and particle transport observed on the TCV tokamak

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Infoscience - École polytechnique fédérale de Lausanne