Reduced kinetic modelling of shattered pellet injection in ASDEX upgrade
Journal article, 2025
Plasma-Terminating disruptions represent a critical outstanding issue for reactor-relevant tokamaks. ITER will use shattered pellet injection (SPI) as its disruption mitigation system to reduce heat loads, vessel forces and to suppress the formation of runaway electrons. In this paper we demonstrate that reduced kinetic modelling of SPI is capable of capturing the major experimental trends in ASDEX Upgrade SPI experiments, such as dependence of the radiated energy fraction on neon content, or the current quench dynamics. Simulations are also consistent with the experimental observation of no runaway electron generation with neon and mixed deuterium-neon pellet composition. We also show that statistical variations in the fragmentation process only have a notable impact on the disruption dynamics at intermediate neon doping, as was observed in experiments.
plasma simulation
plasma dynamics
Author
P. Halldestam
Max Planck Society
P. Heinrich
Max Planck Society
Gergely Papp
Max Planck Society
Mathias Hoppe
Chalmers, Physics, Subatomic, High Energy and Plasma Physics
Royal Institute of Technology (KTH)
M. Hoelzl
Max Planck Society
Istvan Pusztai
Subatomic, High Energy and Plasma Physics
Oskar Vallhagen
Chalmers, Physics, Subatomic, High Energy and Plasma Physics
R. Fischer
Max Planck Society
Frank Jenko
Max Planck Society
Journal of Plasma Physics
0022-3778 (ISSN) 1469-7807 (eISSN)
Vol. 91 4 E104Subject Categories (SSIF 2025)
Fusion, Plasma and Space Physics
Other Physics Topics
DOI
10.1017/S0022377825100470