Multipole shimming of permanent magnets using harmonic corrector rings

TitleMultipole shimming of permanent magnets using harmonic corrector rings
Publication TypeJournal Article
Year of Publication2007
AuthorsJachmann R.C, Trease D.R, Bouchard L.S, Sakellariou D., Martin R.W, Schlueter R.D, Budinger T.F, Pines A
JournalReview of Scientific Instruments
Volume78
Issue3
Date PublishedMar
ISBN Number0034-6748
Accession NumberWOS:000245320800056
Keywordsfield
Abstract

Shimming systems are required to provide sufficient field homogeneity for high resolution nuclear magnetic resonance (NMR). In certain specialized applications, such as rotating-field NMR and mobile ex situ NMR, permanent magnet-based shimming systems can provide considerable advantages. We present a simple two-dimensional shimming method based on harmonic corrector rings which can provide arbitrary multipole order shimming corrections. Results demonstrate, for example, that quadrupolar order shimming improves the linewidth by up to an order of magnitude. An additional order of magnitude reduction is in principle achievable by utilizing this shimming method for z-gradient correction and higher order xy gradients. (c) 2007 American Institute of Physics.

URL<Go to ISI>://WOS:000245320800056
DOI10.1063/1.2713438
Short TitleMultipole shimming of permanent magnets using harmonic corrector rings
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