Development of 1 GHz superconducting NMR magnet at TML/NRIM

Author

Kiyoshi, T. ; Sato, A. ; Wada, H. ; Hayashi, S. ; Shimada, M. ; Kawate, Y.

Author_Institution

Tsukuba Labs., Nat. Res. Inst. for Metals, Ibaraki, Japan

Volume

9

Issue

2

fYear

1999

fDate

6/1/1999 12:00:00 AM

Firstpage

559

Lastpage

562

Abstract

Development of a 1 GHz superconducting NMR magnet is in progress at the Tsukuba Magnet Laboratory of the National Research Institute for Metals. The magnet will consist of two parts. The outer magnet of LTS coils is designed to generate a field of 21.1 T (900 MHz) in persistent current mode. The inner coil is designed to generate an additional 2.4 T, resulting in a central field of 23.5 T (1 GHz) in a 54 mm diameter bore at room temperature. As a high-resolution NMR magnet, field stability as well as field homogeneity is very important, which is especially difficult to achieve in the inner coil when exposed to extremely high magnetic fields that superconducting magnets have not yet encountered. The engineering design is complete and fabrication of the superconductors has begun. This report presents the results of the engineering design and R&D studies on the candidate superconductors for the inner coil, such as BSCCO, and improved Nb/sub 3/Al and Nb/sub 3/Sn.

Keywords

NMR spectrometers; high-temperature superconductors; superconducting coils; superconducting magnets; 1 GHz; 2.4 T; 21.1 T; 23.5 T; 54 mm; 900 MHz; BiSrCaCuO; HTSC inner coil; Japan; LTS outer coils; Nb/sub 3/Al; Nb/sub 3/Sn; R&D studies; candidate superconductors; central field; engineering design; fabrication; field homogeneity; field stability; persistent current mode; superconducting NMR magnet; Boring; Design engineering; Laboratories; Niobium; Nuclear magnetic resonance; Persistent currents; Superconducting coils; Superconducting magnets; Superconductivity; Temperature;

fLanguage

English

Journal_Title

Applied Superconductivity, IEEE Transactions on

Publisher

ieee

ISSN

1051-8223

Type

jour

DOI

10.1109/77.783357

Filename

783357