超電導接合を用いた永久電流1.3 GHz NMRに向けて（２）〜400 MHz (9.39 T)磁石用REBCO内層コイルの単体試験特性〜
(Towards a persistent current 1.3 GHz NMR using superconducting joints (2) - Test results of a REBCO inner coil with superconducting joints for a 400 MHz (9.39 T) LTS/REBCO NMR -)