Stellarators with Permanent Magnets

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, t...

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Bibliographic Details
Published inPhysical review letters Vol. 124; no. 9; p. 095001
Main Authors Helander, P, Drevlak, M, Zarnstorff, M, Cowley, S C
Format Journal Article
LanguageEnglish
Published United States 06.03.2020
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Summary: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.
ISSN:1079-7114
DOI:10.1103/PhysRevLett.124.095001