Title :
Persistent-mode operation of a 920 MHz high-resolution NMR magnet
Author :
Kiyoshi, Tsukasa ; Sato, Akio ; Takeuchi, Takao ; Itoh, Kikuo ; Matsumoto, Shinji ; Ozaki, Osamu ; Fukushima, Keiji ; Wada, Hitoshi ; Yoshikawa, Masatoshi ; Kamikado, Takeshi ; Ito, Satoshi ; Miki, Takashi ; Hase, Takashi ; Hamada, Mamoru ; Hayashi, Seiji
Author_Institution :
Tsukuba Magnet Lab., Nat. Inst. for Mater. Sci., Ibaraki, Japan
fDate :
3/1/2002 12:00:00 AM
Abstract :
Development of a high-field NMR magnet has been underway at the Tsukuba Magnet Laboratory of the National Institute for Materials Science. The magnet succeeded in a persistent-mode operation at 21.17 T in December 1999. A 283-day long-term operation was carried out from October 2000 to August 2001. It included a persistent operation at 21.6 T (920 MHz) for 108 days. This was the highest field that the superconducting magnets have ever achieved in a persistent operation. Field decay was less than 2 Hz/h. Field homogeneity after correcting with superconducting shim coils were less than 0.1 ppm in a sample volume. These results confirmed that this magnet had been successfully developed as a high-resolution NMR magnet.
Keywords :
NMR spectrometers; nuclear magnetic resonance; superconducting coils; superconducting magnets; 108 day; 21.17 T; 21.6 T; 283 day; 920 MHz; field decay; field homogeneity; high-resolution NMR magnet; persistent-mode operation; superconducting magnets; superconducting shim coils; Indium tin oxide; Laboratories; Magnetic fields; Magnetic resonance; Materials science and technology; Nuclear magnetic resonance; Proteins; Spectroscopy; Superconducting coils; Superconducting magnets;
Journal_Title :
Applied Superconductivity, IEEE Transactions on
DOI :
10.1109/TASC.2002.1018500
