213 citations · 290 across the 8 of their papers we have counts for
8 papers
Energetic particle loss mechanisms in reactor-scale equilibria close to quasisymmetry
E. J. Paul, A. Bhattacharjee, M. Landreman +3
Collisionless physics primarily determines the transport of fusion-born alpha particles in 3D equilibria. Several transport mechanisms have been implicated in stellarator configura…
Adjoint methods for quasisymmetry of vacuum fields on a surface
Richard Nies, Elizabeth J. Paul, Stuart R. Hudson +1
Adjoint methods can speed up stellarator optimisation by providing gradient information more efficiently compared to finite-difference evaluations. Adjoint methods are herein appli…
On the stabilisation of locked tearing modes in ITER and other large tokamaks
Richard Nies, Allan H. Reiman, Nathaniel J. Fisch
Tearing modes in tokamaks typically rotate while small and then lock at a fixed location when larger. Research on present-day devices has focused almost exclusively on stabilisatio…
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…
Disruption Avoidance via RF Current Condensation in Magnetic Islands Produced by Off-Normal Events
A. H. Reiman, N. Bertelli, P. T. Bonoli +5
As tokamaks are designed and built with increasing levels of stored energy in the plasma, disruptions become increasingly dangerous. It has been reported that 95% of the disruption…
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…
Calculating RF current condensation with self-consistent ray-tracing
Richard Nies, Allan H. Reiman, Eduardo Rodriguez +2
By exploiting the nonlinear amplification of the power deposition of RF waves, current condensation promises new pathways to the stabilisation of magnetic islands. We present a num…
Testing performance with and without Block Low Rank Compression in MUMPS and the new PaStiX 6.0 for JOREK nonlinear MHD simulations
Richard Nies, Matthias Hoelzl
The interface to the MUMPS solver was updated in the JOREK MHD code to support Block Low Rank (BLR) compression and an interface to the new PaStiX solver version 6 has been impleme…