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NMR spectroscopy up to 35.2T using a series-connected hybrid magnet.

Title: NMR spectroscopy up to 35.2T using a series-connected hybrid magnet.
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Name(s): Gan, Zhehong, author
Hung, Ivan, author
Wang, Xiaoling, author
Paulino, Joana, author
Wu, Gang, author
Litvak, Ilya M, author
Gor'kov, Peter L, author
Brey, William W, author
Lendi, Pietro, author
Schiano, Jeffrey L, author
Bird, Mark D, author
Dixon, Iain R, author
Toth, Jack, author
Boebinger, Gregory S, author
Cross, Timothy A, author
Type of Resource: text
Genre: Journal Article
Text
Date Issued: 2017-11-01
Physical Form: computer
online resource
Extent: 1 online resource
Language(s): English
Abstract/Description: The National High Magnetic Field Laboratory has brought to field a Series-Connected Hybrid magnet for NMR spectroscopy. As a DC powered magnet it can be operated at fields up to 36.1T. The series connection between a superconducting outsert and a resistive insert dramatically minimizes the high frequency fluctuations of the magnetic field typically observed in purely resistive magnets. Current-density-grading among various resistive coils was used for improved field homogeneity. The 48mm magnet bore and 42mm outer diameter of the probes leaves limited space for conventional shims and consequently a combination of resistive and ferromagnetic shims are used. Field maps corrected for field instabilities were obtained and shimming achieved better than 1ppm homogeneity over a cylindrical volume of 1cm diameter and height. The magnetic field is regulated within 0.2ppm using an external Li lock sample doped with paramagnetic MnCl. The improved field homogeneity and field regulation using a modified AVANCE NEO console enables NMR spectroscopy at H frequencies of 1.0, 1.2 and 1.5GHz. NMR at 1.5GHz reflects a 50% increase in field strength above the highest superconducting magnets currently available. Three NMR probes have been constructed each equipped with an external lock rf coil for field regulation. Initial NMR results obtained from the SCH magnet using these probes illustrate the very exciting potential of ultra-high magnetic fields.
Identifier: FSU_pmch_28890288 (IID), 10.1016/j.jmr.2017.08.007 (DOI), PMC5675800 (PMCID), 28890288 (RID), 28890288 (EID), S1090-7807(17)30204-5 (PII)
Keywords: 1.5GHz NMR, Field regulation, Magic angle spinning solid-state NMR, Oriented sample solid-state NMR, Series-connected hybrid magnet
Grant Number: P41 GM122698
Publication Note: This NIH-funded author manuscript originally appeared in PubMed Central at https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5675800.
Persistent Link to This Record: http://purl.flvc.org/fsu/fd/FSU_pmch_28890288
Host Institution: FSU
Is Part Of: Journal of magnetic resonance (San Diego, Calif. : 1997).
1096-0856
Issue: vol. 284

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Gan, Z., Hung, I., Wang, X., Paulino, J., Wu, G., Litvak, I. M., … Cross, T. A. (2017). NMR spectroscopy up to 35.2T using a series-connected hybrid magnet. Journal Of Magnetic Resonance (San Diego, Calif. : 1997). Retrieved from http://purl.flvc.org/fsu/fd/FSU_pmch_28890288