258 citations · 1.6k across the 62 of their papers we have counts for
6 papers · 2 filters
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.…
Reduction of electrostatic turbulence in a quasi-helically symmetric stellarator via critical gradient optimization
G. T. Roberg-Clark, P. Xanthopoulos, G. G. Plunk
We present a stellarator configuration optimized for a large threshold (``critical gradient'') for the onset of the ion temperature gradient (ITG) driven mode, which achieves the l…
Coarse-grained gyrokinetics for the critical ion temperature gradient in stellarators
G. T. Roberg-Clark, G. G. Plunk, P. Xanthopoulos
We present a modified gyrokinetic theory to predict the critical gradient that determines the linear onset of the ion temperature gradient (ITG) mode in stellarator plasmas. A coar…
Direct construction of stellarator-symmetric quasi-isodynamic magnetic configurations
Katia Camacho Mata, Gabriel G. Plunk, Rogerio Jorge
We develop the formalism of the first order near-axis expansion of the MHD equilibrium equations described in Garren & Boozer (1991), Plunk et al. (2019) and Plunk et al. (2021), f…
A single-field-period quasi-isodynamic stellarator
R. Jorge, G. G. Plunk, M. Drevlak +4
A single-field-period quasi-isodynamic stellarator configuration is presented. This configuration, which resembles a twisted strip, is obtained by the method of direct construction…
Energetic bounds on gyrokinetic instabilities. Part II. Modes of optimal growth
G. G. Plunk, Per Helander
We introduce modes of instantaneous optimal growth of free energy for the fully electromagnetic gyrokinetic equations. We demonstrate how these "optimal modes" arise naturally from…