76 citations · 259 across the 15 of their papers we have counts for
17 papers
Controlling writhe in stellarator optimization
Tobias M. Schuett, Sophia A. Henneberg
The writhe of a closed curve measures its coiling, and for a ribbon along it, writhe is the contribution to the linking number not due to twist. In stellarators, large writhe impli…
A New Degree of Freedom in Stellarator Coil Design
Sophia A. Henneberg, Annika Zettl
Reversed toroidal field (RTF) coils introduce a new degree of freedom in stellarator coil design. While the total plasma-linked current is fixed by Ampere's law, compensating RTF c…
Understanding and Quantifying Banana Coil Magnetic Fields and Forces for Enhanced Optimisation
Annika Zettl, Tobias Schuett, Sophia Henneberg
The optimised tokamak-stellarator hybrid concept (Henneberg and Plunk 2024) has the potential to combine tokamak and stellarator advantages to achieve magnetically confined fusion.…
How Does The Magnetic Gradient Scale Length Influence Complexity of Filamentary Coils in Stellarators?
John Kappel, Matt Landreman, Philipp Jurašić +1
The distance between the last closed flux surface (LCFS) and the nearest electromagnetic coils is a dominating factor in the cost, size, and engineering difficulty of stellarators.…
Characterisation of X- and O-points in Wendelstein 7-X with respect to coil currents
Robert Davies, Christopher B. Smiet, Charlotte Batzdorf +3
This work analyses vacuum magnetic field topology in Wendelstein 7-X (W7-X) with respect to changes in the current in the superconducting coils. We develop a fast automated scheme…
The topology of non-resonant stellarator divertors
Robert Davies, Christopher B. Smiet, Alkesh Punjabi +2
We 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 th…
Exploring novel compact quasi-axisymmetric stellarators
Tobias M. Schuett, Sophia A. Henneberg
The new class of compact quasi-axisymmetric stellarators with a wide range of field periods offers the unique potential to combine the advantages of the two leading magnetic confin…
A compact stellarator-tokamak hybrid
S. A. Henneberg, G. G. Plunk
Tokamaks and stellarators are the leading two magnetic confinement devices for producing fusion energy, begging the question of whether the strengths of the two could be merged int…
Quasi-isodynamic stellarators with low turbulence as fusion reactor candidates
Alan G. Goodman, Pavlos Xanthopoulos, Gabriel G. Plunk +7
The stellarator is a type of fusion energy device that - if properly designed - could provide clean, safe, and abundant energy to the grid. To generate this energy, a stellarator m…
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…
Critical gradient turbulence optimization toward a compact stellarator reactor concept
G. T. Roberg-Clark, G. G. Plunk, P. Xanthopoulos +3
Integrating turbulence into stellarator optimization is shown by targeting the onset for the ion-temperature-gradient mode, highlighting effects of parallel connection length, loca…
Constructing precisely quasi-isodynamic magnetic fields
Alan Goodman, Katia Camacho Mata, Sophia A Henneberg +6
We present a novel method for numerically finding quasi-isodynamic stellarator magnetic fields with excellent fast-particle confinement and extremely small neoclassical transport.…
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…
Representing the boundary of stellarator plasmas
Sophia A. Henneberg, Per Helander, Michael Drevlak
In stellarator optimization studies, the boundary of the plasma is usually described by Fourier series that are not unique: several sets of Fourier coefficients describe approximat…
Combined plasma-coil optimization algorithms
Sophia A. Henneberg, Stuart R. Hudson, David Pfefferlé +1
Combined plasma-coil optimization approaches for designing stellarators are discussed and a new method for calculating free-boundary equilibria is proposed. Four distinct categorie…
Properties of a new quasi-axisymmetric configuration
S. A. Henneberg, M. Drevlak, C. Nührenberg +4
A novel, compact, quasi-axisymmetric configuration is presented which exhibits low fast-particle losses and is stable to ideal MHD instabilities. The design has fast-particle loss…
Explosive Instability and Erupting Flux Tubes in a Magnetised Plasma Atmosphere
S. C. Cowley, B. Cowley, S. A. Henneberg +1
The eruption of multiple flux tubes in a magnetised plasma atmosphere is proposed as a mechanism for explosive release of energy in plasmas. Linearly stable isolated flux tubes are…