1Kyoto University, Kyoto, Japan, 2Toshiba corporation, Tokyo, Japan, 3Hokkaido University, Sapporo, Japan, 4Osaka University, Osaka, Japan, 5Waseda University, Tokyo, Japan
Because of the rapid rise of helium price in recent years, we started a project targeting to produce high-temperature superconducting ultra-high-field MRI systems with REBCO (Rare-earth - Barium - Copper Oxide) tapes and as the first step, we developed a middle-size 1T-REBCO magnet and evaluated its magnetic field stability and homogeneity with dedicated field camera system with 16ch NMR probes. Inhomogeneity was up to 800 ppm and stability with linear trend correction was ±1 ppm, and the causes were investigated.
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