高温超伝導材料を利用した次世代NMR技術の開発；高電流密度コイル化技術の構築（３）－接続部を有するREBCOコイルの耐電磁力試験－
(Development of the next-generation NMR technology using HTS materials; For achievement of HTS coil with high operating current density (3) - Experimental results of REBCO coil including a joint between conductors under electro-magnetic forces -)