213 citations · 843 across the 37 of their papers we have counts for
39 papers
Heterogeneous Acceleration of TRIMEG++ code using OpenMP for Gyrokinetic Simulations
Nicola Noventa, Giorgio Daneri, Zhixin Lu +1
Turbulent transport largely determines the performance of magnetic-confinement fusion devices such as tokamaks, and gyrokinetic particle-in-cell (PIC) simulations are a principal t…
FIREWALL: A surrogate model for the rapid assessment of tokamak wall loading and melting by runaway electrons
Victor Johan Svensson, Tommaso Rizzi, Svetlana Ratynskaia +4
Runaway electron (RE) beams generated during tokamak disruptions can deposit highly localized heat loads on plasma-facing components, posing a serious risk of melting and damage. M…
Neural-Parareal: Dynamically Training Neural Operators as Coarse Solvers for Time-Parallelisation of Fusion MHD Simulations
S. J. P. Pamela, N. Carey, J. Brandstetter +10
The fusion research facility ITER is currently being assembled to demonstrate that fusion can be used for industrial energy production, while several other programmes across the wo…
Implementation of matrix compression in the coupling of JOREK to realistic 3D conducting wall structures
Federico Cipolletta, Nina Schwarz, Matthias Hoelzl +6
JOREK is an advanced non-linear simulation code for studying MHD instabilities in magnetically confined fusion plasmas and their control and/or mitigation. A free-boundary and resi…
RMP screening in JOREK-CARIDDI
Bas Slotema, Matthias Hoelzl, Verena Mitterauer
Edge localized modes (ELMs) are instabilities at the tokamak edge that can have short outbursts of highly energetic particles and heat, which can severely damage the walls of a pla…
Towards Robust Solvers for Nuclear Fusion Simulations Using JOREK: A Numerical Analysis Perspective
Alex Quinlan, Vandana Dwarka, Ihor Holod +1
One of the most well-established codes for modeling non-linear Magnetohydrodynamics (MHD) for tokamak reactors is JOREK, which solves these equations with a Bézier surface based fi…
How well can VMEC predict the initial saturation of external kink modes in near circular tokamaks and stellarators?
Rohan Ramasamy, Matthias Hoelzl, Sophia Henneberg +3
The equilibrium code, VMEC, is used to study external kinks in low tokamaks and stellarators. The applicability of the code when modelling nonlinear MHD effects is explor…
Probing non-linear MHD stability of the EDA H-mode in ASDEX Upgrade
A Cathey, M Hoelzl, L Gil +11
Regimes of operation in tokamaks that are devoid of large ELMs have to be better understood to extrapolate their applicability to reactor-relevant devices. This paper describes non…
Filamentary plasma eruptions and the heating and acceleration of electrons
Heinz Isliker, Andres Cathey, Matthias Hoelzl +2
We present test-particle simulations of electrons during a nonlinear MHD simulation of a type-I edge localized mode (ELM) to explore the effect of an eruptive plasma filament on th…
Development and application of a hybrid MHD-kinetic model in JOREK
T. J. Bogaarts, M. Hoelzl, G. T. A. Huijsmans +1
Energetic particle (EP) driven instabilities will be of strongly increased relevance in future burning plasmas as the EP pressure will be very large compared to the thermal plasma.…
Modelling of saturated external MHD instabilities in tokamaks: a comparison of 3D free boundary equilibria and nonlinear stability calculations
Rohan Ramasamy, Guillermo Bustos Ramirez, Matthias Hoelzl +5
3D free boundary equilibrium computations have recently been used to model external kinks and edge harmonic oscillations (EHOs), comparing with linear MHD stability codes, and nonl…
JOREK3D: An extension of the JOREK nonlinear MHD code to stellarators
Nikita Nikulsin, Rohan Ramasamy, Matthias Hoelzl +4
Although the basic concept of a stellarator was known since the early days of fusion research, advances in computational technology have enabled the modelling of increasingly compl…
Complete 3D MHD simulations of the current quench phase of ITER mitigated disruptions
F. J. Artola, A. Loarte, M. Hoelzl +3
Complete 3D simulations of the current quench phase of ITER disruptions are key to predict asymmetric forces acting into the ITER wall. We present for the first time such simulatio…
An E & B Gyrokinetic Simulation Model for Kinetic Alfvén Waves inTokamak Plasmas
Maxwell Rosen, Zhixin Lu, Matthias Hoelzl
The gyrokinetic particle simulation serves as a powerful tool for the studies of transport, nonlinear phenomenon, and energetic particle physics in tokamak plasmas. While most gyro…
Collisional-radiative non-equilibrium impurity treatment for JOREK simulations
D. Hu, G. T. A. Huijsmans, E. Nardon +4
A collisional-radiative non-equilibrium impurity treatment for JOREK 3D nonlinear magneto-hydrodynamic (MHD) simulations has been developed. The impurities are represented by super…
Comparing spontaneous and pellet-triggered ELMs via non-linear extended MHD simulations
A. Cathey, M. Hoelzl, S. Futatani +8
Injecting frozen deuterium pellets into an ELMy H-mode plasma is a well established scheme for triggering edge localized modes (ELMs) before they naturally occur. Based on an ASDEX…
Simulations of COMPASS Vertical Displacement Events with a self-consistent model for halo currents including neutrals and sheath boundary conditions
F. J. Artola, A. Loarte, E. Matveeva +11
The understanding of the halo current properties during disruptions is key to design and operate large scale tokamaks in view of the large thermal and electromagnetic loads that th…
Enhanced Preconditioner for JOREK MHD Solver
I Holod, M Hoelzl, P S Verma +3
The JOREK extended magneto-hydrodynamic (MHD) code is a widely used simulation code for studying the non-linear dynamics of large-scale instabilities in divertor tokamak plasmas. D…
Testing of the new JOREK stellarator-capable model in the tokamak limit
Nikita Nikulsin, Matthias Hoelzl, Alessandro Zocco +2
In preparation for extending the JOREK nonlinear MHD code to stellarators, a hierarchy of stellarator-capable reduced and full MHD models has been derived and tested. The derivatio…
The JOREK non-linear extended MHD code and applications to large-scale instabilities and their control in magnetically confined fusion plasmas
M Hoelzl, GTA Huijsmans, SJP Pamela +50
JOREK is a massively parallel fully implicit non-linear extended MHD code for realistic tokamak X-point plasmas. It has become a widely used versatile code for studying large-scale…
Radiation asymmetry and MHD destabilization during the thermal quench after impurity Shattered Pellet Injection
D. Hu, E. Nardon, M. Hoelzl +7
The radiation response and the MHD destabilization during the thermal quench after a mixed species Shattered Pellet Injection (SPI) with impurity species neon and argon are investi…
Non-linear extended MHD simulations of type-I edge localised mode cycles in ASDEX Upgrade and their underlying triggering mechanism
Andres Cathey, M. Hoelzl, K. Lackner +9
A triggering mechanism responsible for the explosive onset of edge localised modes (ELMs) in fusion plasmas is identified by performing, for the first time, non-linear magnetohydro…
Understanding the reduction of the edge safety factor during hot VDEs and fast edge cooling events
F. J. Artola, K. Lackner, G. T. A. Huijsmans +3
In the present work a simple analytical approach is presented in order to clarify the physics behind the edge current density behaviour of a hot plasma entering in contact with a r…
First predictive simulations for deuterium shattered pellet injection in ASDEX Upgrade
M. Hoelzl, D. Hu, E. Nardon +1
First simulations of deuterium shattered pellet injection (SPI) into an ASDEX Upgrade H-Mode plasma with the JOREK MHD code are presented. Resistivity is increased by one order of…