49 citations · 133 across the 8 of their papers we have counts for
8 papers
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…
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…
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…
A three-dimensional reduced MHD model consistent with full MHD
Nikita Nikulsin, Matthias Hoelzl, Alessandro Zocco +2
Within the context of a viscoresistive magnetohydrodynamic (MHD) model with anisotropic heat transport and cross-field mass diffusion, we introduce novel three-term representations…
Magnetic flux pumping in 3D nonlinear magnetohydrodynamic simulations
I. Krebs, S. C. Jardin, S. Günter +4
A self-regulating magnetic flux pumping mechanism in tokamaks that maintains the core safety factor at , thus preventing sawteeth, is analyzed in nonlinear 3D magnetohy…
Double-resonant fast particle-wave interaction
Mirjam Schneller, Philipp Lauber, Michael Brüdgam +2
In future fusion devices fast particles must be well confined in order to transfer their energy to the background plasma. Magnetohydrodynamic instabilities like Toroidal Alfvén Eig…