Stellarators with permanent magnets *

Publication Year
2020
Abstract

It is shown that the magnetic-field coils of a stellarator can, at least in principle, be substantially simplified by the use of permanent magnets. Such magnets cannot create toroidal magnetic flux but they can be used to shape the plasma and thus to create poloidal flux and rotational transform, thereby easing the requirements on the magnetic-field coils. As an example, a quasiaxisymmetric stellarator configuration is constructed with only 8 circular coils (all identical) and permanent magnets.

Journal
Physical Review Letters
Volume
124
Issue
9
Date Published
03/2020
ISSN Number
1079-7114
Other Numbers
https://arxiv.org/abs/1907.01363