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. 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.

arXiv commentPublished in Nuclear Fusion

References in corpus (3)

• Runaway dynamics in the DT phase of ITER operations in the presence of massive material injection
• First predictive simulations for deuterium shattered pellet injection in ASDEX Upgrade
• Understanding the reduction of the edge safety factor during hot VDEs and fast edge cooling events

Cited by in corpus (10)

• The JOREK non-linear extended MHD code and applications to large-scale instabilities and their control in magnetically confined fusion plasmas
• Radiation asymmetry and MHD destabilization during the thermal quench after impurity Shattered Pellet Injection
• Effect of Two-Stage Shattered Pellet Injection on Tokamak Disruptions
• Lagrangian particle model for 3D simulation of pellets and SPI fragments in tokamaks
• The hot-tail runaway seed landscape during the thermal quench in tokamaks
• Near-field simulations of pellet ablation for disruptions mitigation in tokamaks
• Axisymmetric predictions for mitigated and vertically unstable disruptions in ITER with runaway electrons
• Reduced kinetic modelling of shattered pellet injection in ASDEX Upgrade
• Collisional-radiative non-equilibrium impurity treatment for JOREK simulations
• Stability impacts from the current and pressure profile modifications within finite sized island