Fast plasma dilution in ITER with pure Deuterium Shattered Pellet Injection

Eric Nardon (1) , D Hu (2) , M Hoelzl (3) , D Bonfiglio (4)

1 IRFM - Institut de Recherche sur la Fusion par confinement Magnétique
2 BUAA - Beihang University
3 IPP-MPG - Max Planck Institute for Plasma physics
4 Consorzio RFX - Ricerca Formazione Innovazione

JOREK 3D non-linear MagnetoHydroDynamic (MHD) simulations of pure Deuterium Shattered Pellet Injection in ITER are presented. Considering a 15 MA L-mode plasma with a thermal energy content of 36 MJ from the non-activation phase of ITER operation, it is shown that such a scheme could allow diluting the plasma by more than a factor 10 without immediately triggering large MHD activity, provided the background impurity density is low enough. This appears as a promising strategy to reduce the risk of hot tail Runaway Electron (RE) generation and to avoid RE beams altogether in ITER, motivating further studies in this direction.

Domains: Physics [physics]

Eric Nardon, D Hu, M Hoelzl, D Bonfiglio. Fast plasma dilution in ITER with pure Deuterium Shattered Pellet Injection. Nuclear Fusion, 2020. ⟨cea-02981009⟩