Title :
Operation of a 920-MHz high-resolution NMR magnet at TML
Author :
Kiyoshi, Tsukasa ; Yoshikawa, Masatoshi ; Sato, Akio ; Itoh, Kikuo ; Matsumoto, Shinji ; Wada, Hitoshi ; Ito, Satoshi ; Miki, Takashi ; Miyazaki, Takayoshi ; Kamikado, Takeshi ; Ozaki, Osamu ; Hase, Takashi ; Hamada, Mamoru ; Hayashi, Seiji ; Kawate, Yosh
Author_Institution :
Tsukuba Magnet Lab., Nat. Inst. for Mater. Sci., Ibaraki, Japan
fDate :
6/1/2003 12:00:00 AM
Abstract :
As a milestone in the 1-GHz NMR magnet project that is being carried out at the Tsukuba Magnet Laboratory (TML), a 920-MHz high-resolution NMR magnet was successfully manufactured. It 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 in diameter. All the coils are cooled with pressurized superfluid helium at 1.55 K. The magnet was moved to a new building of the TML in December 2001. A persistent operation at 920 MHz started in April 2002. The field homogeneity after correcting with superconducting shim coils was less than 0.1 ppm in a sample volume. Field decay decreased to below 1.3 Hz/h at the beginning of July. NMR measurements using this magnet started in July.
Keywords :
nuclear magnetic resonance; superconducting coils; superconducting magnets; (NbTi)3Sn; 1.55 K; 27 mm; 920 MHz; NMR magnet project; NbTi; TML; Tsukuba Magnet Laboratory; cryostat; field homogeneity; high-resolution NMR magnet; pressurized superfluid helium; superconducting shim coils; Boring; Conductors; Laboratories; Manufacturing; Niobium compounds; Nuclear magnetic resonance; Superconducting coils; Superconducting magnets; Tin; Titanium compounds;
Journal_Title :
Applied Superconductivity, IEEE Transactions on
DOI :
10.1109/TASC.2003.812675
