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Low-cost, pseudo-Halbach dipole magnets for NMR

Michael C.D. Tayler 1 Dimitrios Sakellariou 2 
2 LSDRM - Laboratoire Structure et Dynamique par Résonance Magnétique (LCF)
NIMBE UMR 3685 - Nanosciences et Innovation pour les Matériaux, la Biomédecine et l'Energie (ex SIS2M)
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 [ 13 C]-methanol prior to detection of its high-resolution NMR spectrum at zero field (measurement field below 10 À10 T), where signals appear at multiples of the carbon-hydrogen spin-spin coupling frequency 1 J CH ¼ 140:7ð1Þ Hz.
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Submitted on : Tuesday, March 14, 2017 - 7:29:14 AM
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Michael C.D. Tayler, Dimitrios Sakellariou. Low-cost, pseudo-Halbach dipole magnets for NMR. Journal of Magnetic Resonance, Elsevier, 2017, 277, pp.143 - 148. ⟨10.1016/j.jmr.2017.03.001⟩. ⟨cea-01488897⟩



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