Energetic particle optimization of quasi-axisymmetric stellarator equilibria
Nuclear Fusion, 2022 An important goal of stellarator optimization is to achieve good confinement of energetic particles such as, in the case of a reactor, alphas created by deuterium–tritium fusion. In this work, a fixed-boundary stellarator equilibrium was re-optimized for
Alexandra LeViness +6 more
doaj +2 more sources
Stellarator fusion systems enabled by arrays of planar coils
Nuclear FusionWe present an overview of a novel electromagnetic coil configuration for stellarators and its application to two near-term fusion systems. The novel coil configuration is the planar coil stellarator, able to implement precisely-quasisymmetric 3D magnetic
D.A. Gates +18 more
doaj +2 more sources
Coil optimization methods for a planar coil stellarator
Nuclear FusionThe planar coil stellarator design is a novel approach to producing the confining magnetic field of a stellarator plasma. The work presented here details the optimization of the two types of planar coils that are used in the planar coil design: the ...
T.G. Kruger +3 more
doaj +2 more sources
The topology of non-resonant stellarator divertors
Nuclear FusionWe apply topological methods to better understand how the magnetic field in the stellarator edge can be diverted away from the confined region. Our primary method is calculating the winding numbers of closed contours, which gives information on the ...
Robert Davies +4 more
doaj +2 more sources
Precise stellarator quasi-symmetry can be achieved with electromagnetic coils. [PDF]
Proc Natl Acad Sci U S A, 2022 Magnetic fields with quasi-symmetry are known to provide good confinement of charged particles and plasmas, but the extent to which quasi-symmetry can be achieved in practice has remained an open question. Recent work [M. Landreman and E. Paul, Phys. Rev.
Wechsung F +4 more
europepmc +2 more sources
Global gyrokinetic simulations of ITG turbulence in the configuration space of the Wendelstein 7-X stellarator [PDF]
Plasma Physics and Controlled Fusion, 2020 We study the effect of turbulent transport in different magnetic configurations of the Weldenstein 7-X stellarator. In particular, we performed direct numerical simulations with the global gyrokinetic code GENE-3D, modeling the behavior of Ion ...
Di Siena, A. +9 more
core +2 more sources
Single-stage stellarator optimization: combining coils with fixed boundary equilibria [PDF]
Plasma Physics and Controlled Fusion, 2023 We introduce a novel approach for the simultaneous optimization of plasma physics and coil engineering objectives using fixed-boundary equilibria that is computationally efficient and applicable to a broad range of vacuum and finite plasma pressure ...
R. Jorge +4 more
semanticscholar +1 more source
Direct stellarator coil design using global optimization: application to a comprehensive exploration of quasi-axisymmetric devices [PDF]
Journal of Plasma Physics, 2023 Many stellarator coil design problems are plagued by multiple minima, where the locally optimal coil sets can sometimes vary substantially in performance.
Andrew Giuliani
semanticscholar +1 more source
Robust stellarator optimization via flat mirror magnetic fields [PDF]
Nuclear Fusion, 2023 Stellarator magnetic configurations need to be optimized in order to meet all the required properties of a fusion reactor. In this work, it is shown that a flat-mirror quasi-isodynamic (QI) configuration (i.e.
J. Velasco +3 more
semanticscholar +1 more source
Direct microstability optimization of stellarator devices. [PDF]
Physical Review E, 2023 Turbulent transport is regarded as one of the key issues in magnetic confinement nuclear fusion, both for tokamaks and stellarators. In this work, we show that a significant decrease in a microstability-based proxy, as opposed to a geometric one, for the
R. Jorge +6 more
semanticscholar +1 more source