Optimized quasisymmetric stellarators are consistent with the Garren-Boozer construction
Plasma Physics
2019-06-26 v2
Abstract
Most quasisymmetric stellarators to date have been designed by numerically optimizing the plasma boundary shape to minimize symmetry-breaking Fourier modes of the magnetic field strength . At high aspect ratio, a faster approach is to directly construct the plasma shape from the equations of quasisymmetry near the magnetic axis derived by Garren and Boozer [Phys Fluids B 3, 2805 (1991)]. Here we show that the core shape and rotational transform of many optimization-based configurations can be accurately described by this direct-construction approach. This consistency supports use of the near-axis construction as an accurate analytical model for modern stellarator configurations.
Cite
@article{arxiv.1902.01672,
title = {Optimized quasisymmetric stellarators are consistent with the Garren-Boozer construction},
author = {Matt Landreman},
journal= {arXiv preprint arXiv:1902.01672},
year = {2019}
}