A novel scheme for error field correction in permanent magnet stellarators

Journal Article · Tue Jan 17 00:00:00 EST 2023 · Nuclear Fusion

DOI:https://doi.org/10.1088/1741-4326/aca98d· OSTI ID:1957521

Rutkowski, A. ^[1]; Hammond, K.  ^[2]; Zhu, C.  ^[2]; Gates, D.  ^[2]; Chambliss, A.  ^[2]

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1. Princeton Univ., NJ (United States)
2. Princeton Plasma Physics Lab. (PPPL), Princeton, NJ (United States)

Stellarators offer a promising path towards fusion reactors, but their design and construction are complicated by stringent tolerance requirements on highly complex 3D coils. A potential way to simplify the engineering requirements for stellarators is to use simple planar toroidal field coils along with permanent magnet arrays to generate shaping fields. In order to ensure sufficient field accuracy while minimizing engineering complexity and system cost, new techniques are required to correct the field produced by the permanent magnet arrays to within requirements set by plasma physics. This work describes a novel correction method developed for this purpose. This analysis is applied to the design of a quasi-axisymmetric stellarator that employs a combination of permanent magnets and planar toroidal field coils to generate its magnetic field. Analysis techniques and initial results using the method for error correction on a proposed permanent magnet stellarator are shown, and it is demonstrated that the method successfully meets the design requirements of the project.

• Research Organization: Princeton Plasma Physics Laboratory (PPPL), Princeton, NJ (United States)
• Sponsoring Organization: USDOE
• Grant/Contract Number: AC02-09CH11466
• OSTI ID: 1957521
• Journal Information: Nuclear Fusion, Vol. 63, Issue 2; ISSN 0029-5515
• Publisher: IOP Science
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
stellarator
permanent magnets
error correction
fusion