Collisional transport and poloidal asymmetry distribution of impurities in tokamak plasmas, with application to WEST

P Maget (1) , P Manas (1) , R Dumont (1) , J-F Artaud (1) , C Bourdelle (1) , L Colas (1) , M Goniche (1) , X Garbet (1) , J Frank (2, 1) , O Agullo (2) , T Nicolas (3) , 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]

We report in this contribution on the development of an analytic model for a selfconsistent determination of the poloidal asymmetry, collisional flux and steady state profile of heavy impurities [1]. The model is compared with nonlinear axisymmetric simulations with the XTOR code [2, 3, 4], and with computations using the drift-kinetic code NEO [5]. An application to Tungsten peaking in the WEST tokamak under Ion Cyclotron Resonance Heating (ICRH) exemplifies the complex balance between accumulation and expulsion forces at play.

Domains: Physics [physics]; Plasma Physics [physics.plasm-ph]

P Maget, P Manas, R Dumont, J-F Artaud, C Bourdelle, et al.. Collisional transport and poloidal asymmetry distribution of impurities in tokamak plasmas, with application to WEST. IAEA FEC 2020 - 28th IAEA Fusion Energy Conference, May 2021, Nice (E-Conference), France. ⟨cea-03249460⟩