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Abstract #4845

Sequencial Abnormal Events in High-Temperature Superconducting MRI Magnet

Shin-ichi Urayama 1 , Yasuyuki Terao 2 , Osamu Ozaki 2 , Hitoshi Kitaguchi 3 , Shinya Kawashima 2 , Takashi Hase 2 , Ken-ichi Sato 4 , and Hidenao Fukuyama 1

1 Human Brain Research Center, Kyoto University, Kyoto, Kyoto, Japan, 2 Kobe Steel, Ltd., Kobe, Japan, 3 National Institute for Materials Science, Ibaraki, Japan, 4 Sumitomo Electric Industries, Ltd., Osaka, Japan

Because of recent deficit of liquid helium, helium-free MRI magnets with high temperature superconducting (HTS) materials have been expected as one of the solutions. We have developed a 3T HTS-MRI system for human brain research with Bi-2223 tapes and showed its feasibilities at 1.5T. However, in spite that we succeeded energizing to 3T three times, sequencial abnormal events were happened for longer than ten minutes during the ramp-down at the third trial to 3T. Here, we show these unique events specific to HTS magnets.

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