Exploration of the parameter space of piecewise omnigenous stellarator magnetic fields
Abstract
Piecewise omnigenous fields are stellarator magnetic fields that are optimized with respect to radial neoclassical transport thanks to a second adiabatic invariant that is piecewisely constant on the flux-surface. They are qualitatively different from omnigenous fields (including quasi-isodynamic or quasisymmetric fields), for which the second adiabatic invariant is a flux-surface constant. Piecewise omnigenous fields thus open an alternative path towards stellarator reactors. In this work, piecewise omnigenous fields are characterized and parametrized in a systematic manner. This is a step towards including piecewise omnigenity as an explicit design criterion in stellarator optimization, and towards a systematic study of the properties of nearly piecewise omnigenous stellarator configurations.
Keywords
Cite
@article{arxiv.2412.14871,
title = {Exploration of the parameter space of piecewise omnigenous stellarator magnetic fields},
author = {J. L. Velasco and E. Sánchez and I. Calvo},
journal= {arXiv preprint arXiv:2412.14871},
year = {2024}
}