6 papers
Flux pumping and bifurcated relaxations of helical core in 3D magnetohydrodynamic modelling of ASDEX Upgrade plasmas
H. Zhang, M. Hoelzl, I. Krebs +12
Flux pumping was achieved in recent hybrid scenario experiments in the ASDEX Upgrade (AUG) tokamak, which is characterized by a sawtooth-free helical quiescent state and the anomal…
JOREK simulations of the X-point radiator formation and its movement in ASDEX Upgrade
Y. C. Liang, A. Cathey, M. Hoelzl +7
Future large-scale magnetic confinement fusion reactors require operational regimes that can avoid extreme heat fluxes onto the plasma-facing components. One promising regime is th…
Comparison of MHD and gyrokinetic simulations of linear instabilities at the q = 1 surface
F. N. Antlitz, X. Wang, M. Hoelzl +10
Accurate modeling of core instabilities in tokamak plasmas is essential to understand the underlying physical mechanisms and their impact on plasma confinement. The ideal stability…
Self-consistent full MHD coupling of JOREK and STARWALL for advanced plasma free boundary simulation
Raffaele Sparago, Francisco Javier Artola, Matthias Hoelzl
An adequate modelling of the electromagnetic interaction of the plasma with the surrounding conductors is paramount for the correct reproduction of 3D plasma dynamics. Simulations…
Nonlinear MHD simulations of external kinks in quasi-axisymmetric stellarators using an axisymmetric external rotational transform approximation
Rohan Ramasamy, Matthias Hoelzl, Erika Strumberger +2
Reduced magnetohydrodynamic (MHD) equations are used to study the nonlinear dynamics of external kinks in a quasi-axisymmetric (QA) stellarator with varying fractions of external r…
Axisymmetric simulations of vertical displacement events in tokamaks: A benchmark of M3D-C, NIMROD and JOREK
I. Krebs, F. J. Artola, C. R. Sovinec +4
A benchmark exercise for the modeling of vertical displacement events (VDEs) is presented and applied to the 3D nonlinear magneto-hydrodynamic codes M3D-C, JOREK and NIMROD. Th…