High resolution NMR measurements using a 400MHz NMR with an (RE)Ba2Cu3O7-x high-temperature superconducting inner coil: Towards a compact super-high-field NMR

Journal of Magnetic Resonance
R PiaoYoshinori Yanagisawa

Abstract

Use of high-temperature superconducting (HTS) inner coils in combination with conventional low-temperature superconducting (LTS) outer coils for an NMR magnet, i.e. a LTS/HTS NMR magnet, is a suitable option to realize a high-resolution NMR spectrometer with operating frequency >1GHz. From the standpoint of creating a compact magnet, (RE: Rare earth) Ba2Cu3O7-x (REBCO) HTS inner coils which can tolerate a strong hoop stress caused by a Lorentz force are preferred. However, in our previous work on a first-generation 400MHz LTS/REBCO NMR magnet, the NMR resolution and sensitivity were about ten times worse than that of a conventional LTS NMR magnet. The result was caused by a large field inhomogeneity in the REBCO coil itself and the shielding effect of a screening current induced in that coil. In the present paper, we describe the operation of a modified 400MHz LTS/REBCO NMR magnet with an advanced field compensation technology using a combination of novel ferromagnetic shimming and an appropriate procedure for NMR spectrum line shape optimization. We succeeded in obtaining a good NMR line shape and 2D NOESY spectrum for a lysozyme aqueous sample. We believe that this technology is indispensable for the realization of a compact ...Continue Reading

References

Mar 1, 1984·Magnetic Resonance in Medicine : Official Journal of the Society of Magnetic Resonance in Medicine·F Roméo, D I Hoult
Mar 4, 1999·Journal of Magnetic Resonance·W C Tennant, R F Claridge
Oct 13, 2000·Physical Review Letters·Y LinW S Warren
Jan 30, 2008·Journal of Magnetic Resonance·Zhehong GanKiran Shetty
Apr 22, 2008·Journal of Magnetic Resonance·Yoshinori YanagisawaHideaki Maeda
May 16, 2015·Journal of Magnetic Resonance·Kenjiro HashiTadashi Shimizu
Jan 1, 2014·Superconductor Science & Technology·Carmine SenatoreYukikazu Iwasa

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Citations

Apr 1, 2017·Superconductor Science & Technology·A GodekeJ M White
Mar 24, 2018·Journal of the American Society for Mass Spectrometry·Yin-Hung LaiRichard N Zare
Jun 16, 2018·Dental Clinics of North America·Husniye Demirturk KocasaracDonald R Nixdorf

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