Cryocooler Cooled Superconducting Magnet. 4T Class(Nb, Ti)3Sn Superconducting Magnet System with Room Temperature Bore of 38mm
冷凍機冷却型超電導マグネットの開発 室温ボア38mmをもつ4T級(Nb, Ti)3Sn超電導マグネット・システム

Junji SAKURABA, Yutaka YAMADA, Fumiaki HATA, Chin Kung CHONG, Tsuginori HASEBE, Mamoru ISHIHARA, Kazuo WATANABE
1993 TEION KOGAKU (Journal of Cryogenics and Superconductivity Society of Japan)  
We demonstrated a conduction cooled (Nb, Ti)3Sn superconducting magnet using Bismuth based oxide superconducting current leads. The superconducting coil, current leads and heat radiation shield are cooled by a double stage Gifford-McMahon cycle refrigerator without liquid helium and liquid nitrogen. The cool down time from room temperature to 11K was 56 hours. This magnet was operated at 11K in vacuum and generated a magnetic field of 4T in a 38mm room temperature bore at current of 400A. The
more » ... ximum field at 11K was 4.6T at quenching current of 465A.
doi:10.2221/jcsj.28.519 fatcat:2o2sjd3s3bdjfbhj5zae25brde