37 citations · 112 across the 9 of their papers we have counts for
10 papers
Runaway Electrons in Stellarators: Unlikely or Unavoidable?
Ida Ekmark, Matt Landreman
Generation of relativistic runaway electrons has historically not been considered a possible problem in stellarators, but this may not hold in reactor-scale stellarators despite th…
Bayesian optimization of stellarator alpha-particle confinement using data-informed parameter spaces and dimensionality reduction
Matt Landreman, Michael Czekanski, Andrew Giuliani +2
Modern stellarators are typically designed by optimizing the shape of the plasma boundary surface, with the parameters taken to be Fourier amplitudes. Many promising optimization a…
Machine-learning Closure for Vlasov-Poisson Dynamics in Fourier-Hermite Space
Nathaniel Barbour, William Dorland, Ian G. Abel +1
Accurate reduced models of turbulence are desirable to facilitate the optimization of magnetic-confinement fusion reactor designs. As a first step toward higher-dimensional turbule…
Optimization of passive superconductors for shaping stellarator magnetic fields
Alan A. Kaptanoglu, Matt Landreman, Michael C. Zarnstorff
We consider the novel problem of optimizing a large set of passive superconducting coils (PSCs) with currents induced by a background magnetic field rather than power supplies. In…
A family of quasi-axisymmetric stellarators with varied rotational transform
Stefan Buller, Matt Landreman, John Kappel +1
We apply a continuation method to recently optimized stellarator equilibria with excellent quasi-axisymmetry (QA) to generate new equilibria with a wide range of rotational transfo…
Grad-Shafranov equilibria via data-free physics informed neural networks
Byoungchan Jang, Alan A. Kaptanoglu, Rahul Gaur +3
A large number of magnetohydrodynamic (MHD) equilibrium calculations are often required for uncertainty quantification, optimization, and real-time diagnostic information, making M…
Energetic particle transport in optimized stellarators
A Bader, D T Anderson, M Drevlak +7
Nine stellarator configurations, three quasiaxisymmetric, three quasihelically symmetric and three non-quasisymmetric are scaled to ARIES-CS size and analyzed for energetic particl…
Near-Axis Expansion of Stellarator Equilibrium at Arbitrary Order in the Distance to the Axis
R. Jorge, W. Sengupta, M. Landreman
A direct construction of equilibrium magnetic fields with toroidal topology at arbitrary order in the distance from the magnetic axis is carried out, yielding an analytical framewo…
The Parallel Boundary Condition for Turbulence Simulations in Low Magnetic Shear Devices
Mike F. Martin, Matt Landreman, Pavlos Xanthopoulos +2
Flux tube simulations of plasma turbulence in stellarators and tokamaks typically employ coordinates which are aligned with the magnetic field lines. Anisotropic turbulent fluctuat…
Parallel impurity dynamics in the TJ-II stellarator
J A Alonso, J L Velasco, I Calvo +12
We review in a tutorial fashion some of the causes of impurity density variations along field lines and radial impurity transport in the moment approach framework. An explicit and…