Work

Conefield approach to identifying regions without flux surfaces for magnetic fields

Year: 2025

Type: article

Abstract: The conefield variant of a Converse KAM method for 3D vector fields, identifying regions through which no invariant 2-tori pass transverse to a specified direction field is tested on some helical perturbations of an axisymmetric magnetic field in toroidal geometry. This implementation computes the bounds on the slopes of invariant tori of a given class and allows us to apply a subsidiary criterion to extend the non-existence region, saving significant computation time. The method finds regions corresponding to magnetic islands and chaos for the fieldline flow.

Source: Plasma Physics and Controlled Fusion

DOI: 10.1088/1361-6587/adc59b

Authors: D Martínez-del-Río, R S MacKay

Institution: University of Warwick

Language: English

Topic: Magnetic confinement fusion research

Subfield: Nuclear and High Energy Physics

Field: Physics and Astronomy

Domain: Physical Sciences

Open Access status: hybrid

Estimated APC paid: $3,325

Funder: Simons Foundation