Constructing precisely quasi-isodynamic magnetic fields
Abstract
We present a novel method for numerically finding quasi-isodynamic stellarator magnetic fields with excellent fast-particle confinement and extremely small neoclassical transport. The method works particularly well in configurations with only one field period. We examine the properties of these newfound quasi-isodynamic configurations, including their bootstrap currents, particle confinement, and available energy for trapped-electron driven turbulence, as well as the degree to which they change when a finite pressure profile is added. We finally discuss the differences between the magnetic axes of the optimized solutions and their respective initial conditions, and conclude with the prospects for future quasi-isodynamic optimization.
Cite
@article{arxiv.2211.09829,
title = {Constructing precisely quasi-isodynamic magnetic fields},
author = {Alan Goodman and Katia Camacho Mata and Sophia A Henneberg and Rogerio Jorge and Matt Landreman and Gabriel Plunk and Hakan Smith and Ralf Mackenbach and Per Helander},
journal= {arXiv preprint arXiv:2211.09829},
year = {2023}
}
Comments
25 pages, 10 figures