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Fast plasma dilution in ITER with pure Deuterium Shattered Pellet Injection

Abstract : 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.
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Submitted on : Tuesday, October 27, 2020 - 5:26:55 PM
Last modification on : Saturday, June 25, 2022 - 8:26:31 PM
Long-term archiving on: : Thursday, January 28, 2021 - 7:25:24 PM

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

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