Work

The permanent magnet hypothesis: an intuitive approach to designing non-circular magnet arrays with high field homogeneity

Year: 2023

Type: article

Abstract: Does the Halbach magnetization rotation rule that is used for designing circular magnet arrays for achieving the best homogeneity hold also for an elliptical or other non-circular cross-section? In this article, it is shown that a new numerically optimized magnetization rotation rule can provide more than three orders of magnitude improvement in field homogeneity as compared to a Halbach configuration for elliptical systems. Further it is demonstrated that such optimized magnetization rules can be easily derived in an intuitive way by studying virtual permanent magnets of a similar cross-section as the desired magnet array. This is coined as a permanent magnet hypothesis. Finally, it is shown that the applicability of this technique is not limited to circular or elliptical systems but can be applied to any arbitrarily shaped cross-section.

Source: Scientific Reports

DOI: 10.1038/s41598-023-29533-9

Authors: Sumit Tewari, Andrew Webb

Institution: Leiden University Medical Center

Language: English

Topic: Magnetic Properties of Alloys

Subfield: Electronic, Optical and Magnetic Materials

Field: Materials Science

Domain: Physical Sciences

Open Access status: gold

Estimated APC paid: $2,390

Funder: Nederlandse Organisatie voor Wetenschappelijk Onderzoek