41 citations · 165 across the 12 of their papers we have counts for
12 papers
Identification of MHD equilibrium limits for CFQS plasmas
Jian Zhang, Ping Zhu, Haifeng Liu +3
The magnetohydrodynamic (MHD) equilibrium limits in the Chinese First QuasiAxisymmetric Stellarator (CFQS) are investigated using the NTEC code, for both the standard and the m…
Numerical solutions of resistive finite-pressure magnetohydrodynamic equilibria for non-axisymmetric toroidal plasmas
Jian Zhang, Ping Zhu, Chris C. Hegna
A hybrid spectral/finite-element code is developed to numerically solve the resistive finite-pressure magnetohydrodynamic equilibria without the necessity of postulating nested mag…
Suppressing Trapped-Electron-Mode-Driven Turbulence via Optimization of Three-Dimensional Shaping
J. M. Duff, B. J. Faber, C. C. Hegna +2
Turbulent transport driven by trapped electron modes (TEMs) is believed to drive significant heat and particle transport in quasihelically symmetric stellarators. Two three-dimensi…
On the effect of flux-surface shaping on trapped-electron modes in quasi-helically symmetric stellarators
M. J. Gerard, M. J. Pueschel, B. Geiger +5
Using a novel optimization procedure it has been shown that the Helically Symmetric eXperiment (HSX) stellarator can be optimized for reduced trapped-electron-mode (TEM) instabilit…
Enhanced transport at high plasma pressure and sub-threshold kinetic ballooning modes in Wendelstein 7-X
P. Mulholland, K. Aleynikova, B. J. Faber +5
High-performance fusion plasmas, requiring high pressure , are not well-understood in stellarator-type experiments. Here, the effect of on ion-temperature-gradient-driven (I…
Bounce-averaged drifts: Equivalent definitions, numerical implementations, and example cases
R. J. J. Mackenbach, J. M. Duff, M. J. Gerard +3
In this article we provide various analytical and numerical methods for calculating the average drift of magnetically trapped particles across field lines in complex geometries, an…
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…
Importance of theory, computation and predictive modeling in the US magnetic fusion energy strategic plan
Fatima Ebrahimi, Gary Staebler, Paul Bonoli +5
Based on the community input at the National Academy of Sciences (NAS) Madison and Austin workshops in July and December 2017, respectively, this whitepaper was prepared and submit…
A New Optimized Quasihelically SymmetricStellarator
A. Bader, B. J. Faber, J. C. Schmitt +12
A new optimized quasihelically symmetric configuration is described that has the desir-able properties of improved energetic particle confinement, reduced turbulent transportby 3D…
Field-line localized destabilization of ballooning modes in 3D tokamaks
M. Willensdorfer, T. B. Cote, C. C. Hegna +10
Field-line localized ballooning modes have been observed at the edge of high confinement mode plasmas in ASDEX Upgrade with rotating 3D perturbations induced by an externally appli…
Controlling Tokamak Geometry with 3D Magnetic Perturbations
Thomas M Bird, Chris C Hegna
It is shown that small externally applied magnetic perturbations can significantly alter important geometric properties of magnetic flux surfaces in tokamaks. Through 3D shaping, e…
A model for microinstability destabilization and enhanced transport in the presence of shielded 3-D magnetic perturbations
Thomas Bird, Chris Hegna
A mechanism is presented that suggests shielded 3-D magnetic perturbations can destabilize microinstabilities and enhance the associated anomalous transport. Using local 3-D equili…