Eddy currents in a gradient coil, modeled by rings and patches

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Abstract

The gradient coils of an MRI-scanner can be modeled by a surface current on a cylinder. A good approximation of the surface current in the z-coil is obtained from a set of rings and patches on the cylinder. In this paper, an integral equation is derived for the current distribution. To solve this integral equation, the Galerkin method is applied, using global expansion functions. We show that Legendre polynomials are an appropriate choice for the expansion functions. They provide fast convergence. So, only a restricted number of Legendre polynomials is needed. Moreover, an analytical solution is derived, which results in efficient simulations.
Original languageEnglish
Title of host publicationProceedings 2005 IEEE/ACES International Conference on Wireless Communications and Applied Computational Electromagnetics
Place of PublicationPiscataway
PublisherInstitute of Electrical and Electronics Engineers
Pages341-344
Number of pages4
ISBN (Print)0-7803-9068-7
DOIs
Publication statusPublished - 2005
EventInternational Conference on Wireless Communications and Applied Computational Electromagnetics - Honolulu, United States
Duration: 3 Apr 20057 Apr 2005

Conference

ConferenceInternational Conference on Wireless Communications and Applied Computational Electromagnetics
CountryUnited States
CityHonolulu
Period3/04/057/04/05

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  • Cite this

    Kroot, J. M. B., van Eijndhoven, S. J. L., & van de Ven, A. A. F. (2005). Eddy currents in a gradient coil, modeled by rings and patches. In Proceedings 2005 IEEE/ACES International Conference on Wireless Communications and Applied Computational Electromagnetics (pp. 341-344). Institute of Electrical and Electronics Engineers. https://doi.org/10.1109/WCACEM.2005.1469596