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Low-cost, pseudo-Halbach dipole magnets for NMR

Accepted version
Peer-reviewed

Type

Article

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Authors

Tayler, MCD 
Sakellariou, D 

Abstract

We present designs for compact, inexpensive and strong dipole permanent magnets aimed primarily at magnetic resonance applications where prepolarization and detection occur at different locations. Low-homogeneity magnets with a 7.5 mm bore size and field up to nearly 2 T are constructed using low-cost starting materials, standard workshop tools and only few hours of labor – an achievable project for a student or postdoc with spare time. As an application example we show how our magnet was used to polarize the nuclear spins in approximately 1 mL of pure [13C]-methanol prior to detection of its high-resolution NMR spectrum at zero field (measurement field below 10−10 T), where signals appear at multiples of the carbon-hydrogen spin-spin coupling frequency 1JCH=140.7(1) Hz.

Description

Keywords

nuclear magnetic resonance (NMR), permanent magnets, low-field NMR, zero-field NMR

Journal Title

Journal of Magnetic Resonance

Conference Name

Journal ISSN

1090-7807
1096-0856

Volume Title

277

Publisher

Elsevier
Sponsorship
European Commission (625054)
This work has received support from the European Research Council (author DS, grant agreement FP7-205119 R-EvolutioN-MR) and from the European Commission’s Seventh Framework Program (author MCDT under the Marie Curie International Outgoing Fellowship Programme, grant agreement FP7-625054 ODMR-CHEM; author DS, 2007–2013).