1. Operation of a 920-MHz High-Resolution NMR Magnet at TML.
- Author
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Kiyoshi, Tsukasa, Yoshikawa, Masatoshi, Sato, Akio, Itoh, Kikuo, Matsumoto, Shinji, Wada, Hitoshi, Ito, Satoshi, Miki, Takashi, Miyazaki, Takayoshi, Kamikado, Takeshim, Ozaki, Osamu, Hase, Takashi, Hamada, Mamoru, Hayashi, Seiji, Kawate, Yoshio, and Hirose, Ryoichi
- Subjects
SUPERCONDUCTING magnets ,NUCLEAR magnetic resonance ,NIOBIUM ,TIN ,CRYOSTATS - 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)aSh, Ta-reinforced (Nb, Ti)[sub 3]Sn, 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. [ABSTRACT FROM AUTHOR]
- Published
- 2003
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