Practical Use of a Liquid Helium-Free Superconducting Magnet(Magnet Technology)

概要

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A cryocooler-cooled 4.6 T superconducting magnet with a 38 mm room temperature bore, which consists of a low-T_c Nb_3Sn coil and high-T_c Bi_2Sr_2Ca_2Cu3O_<10> current leads, has been working in vacuum for about 18000 cooling hours without trouble, It is found that the high-T_c current leads can hold excellent superconducting properties for a long enough time to be practically used. As a next step, we have succeeded in the construction of a l0.7 T-52 mm room temperature bore and a 5.7 T-220 mm room temperature bore liquid helium-free superconducting magnet.liquid helium freecryocoolerhigh temperature superconducting current leadsuperconducting magnet
東北大学の論文
1996-07-15