Representing the boundary of stellarator plasmas
arXiv:2105.00768 · doi:10.1017/S0022377821000891
Abstract
In stellarator optimization studies, the boundary of the plasma is usually described by Fourier series that are not unique: several sets of Fourier coefficients describe approximately the same boundary shape. A simple method for eliminating this arbitrariness is proposed and shown to work well in practice.