Impurity transport and its modification by MHD in tokamak plasmas, with application to tungsten in WEST

P. Maget (1) , J Frank (2, 1) , O. Agullo (2) , X. Garbet (1) , H. Lütjens (3)

1 IRFM - Institut de Recherche sur la Fusion par confinement Magnétique
2 PIIM - Physique des interactions ioniques et moléculaires
3 CPHT - Centre de Physique Théorique [Palaiseau]

Neoclassical impurity transport & poloidal asymmetry -Can be determined analytically in a self-consistent way -Natural asymmetry (no torque) has already a large impact A magnetic island suppresses thermal screening above a critical size -Verified numerically on a typical WEST plasma equilibrium -When impurity transport is predominantly turbulent (as on WEST) Poloidal asymmetry remains essentially neoclassical

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

P. Maget, J Frank, O. Agullo, X. Garbet, H. Lütjens. Impurity transport and its modification by MHD in tokamak plasmas, with application to tungsten in WEST. EPS 2019 - 46th European Physical Society Conference on Plasma Physics, Jul 2019, Milan, Italy. ⟨cea-02555124⟩