Title :
Development and operation of superconducting NMR magnet beyond 900 MHz
Author :
Kiyoshi, Tsukasa ; Sato, Akio ; Takeuchi, Takao ; Itoh, Kikuo ; Matsumoto, Shinji ; Ozaki, Osamu ; Wada, Hitoshi ; Yoshikawa, Masatoshi ; Kamikado, Takeshi ; Ito, Satoshi ; Miki, Takashi ; Hase, Takashi ; Hamada, Mamoru ; Hayashi, Seiji ; Kawate, Yoshio ;
Author_Institution :
Tsukuba Magnet Lab., Nat. Res. Inst. for Metals, Ibaraki, Japan
fDate :
3/1/2001 12:00:00 AM
Abstract :
As a milestone in the 1-GHz NMR magnet project being carried out at the Tsukuba Magnet Laboratory, a 900-MHz class NMR magnet was successfully manufactured and operated in December 1999. The developed magnet is made of 15%Sn-bronze-processed (Nb,Ti)3Sn, Ta-reinforced (Nb,Ti)3Sn, and NbTi conductors. The room temperature bore of the cryostat is 54 mm is diameter. All the coils are cooled with pressurized superfluid helium. The magnet generated a field of 21.20 T in a driven mode and then operated in a persistent mode at 21.17 T corresponding to a proton NMR frequency of 902 MHz. The field may be raised to the range of 21.6 T (920 MHz) in the near future
Keywords :
niobium alloys; nuclear magnetic resonance; superconducting coils; superconducting magnets; tin alloys; (Nb,Ti)3Sn; (NbTi)3Sn; 1 GHz; 21.17 T; 21.2 T; 21.6 T; 54 mm; 900 MHz; 902 MHz; 920 MHz; NbTi; NbTi conductors; Ta; Ta-reinforced (Nb,Ti)3Sn; Tsukuba Magnet Laboratory; coils; cryostat; driven mode; magnetic field; persistent mode; pressurized superfluid helium; room temperature bore; superconducting NMR magnet; Boring; Conductors; Laboratories; Manufacturing; Niobium compounds; Nuclear magnetic resonance; Superconducting magnets; Temperature; Tin; Titanium compounds;
Journal_Title :
Applied Superconductivity, IEEE Transactions on
