| 摘要 |
PROBLEM TO BE SOLVED: To reduce a vacuum space in the inside of a cryostat so that a normal temperature workspace can be expanded in its outside, and heat infiltrating into the cryostat by radiation can be reduced. SOLUTION: In this superconductive magnet device 10 having a very low temperature structure 16 containing a plurality of superconductive coils 15, a radiation shield 17 which covers the very low temperature structure, and a cryostat 18 which stores these very low temperature structure and radiation shield, the cryostat is equipped with an outer cylinder 20, an inner cylinder 21, and a top plate 22 which connects the upper parts of these outer cylinder and inner cylinder, at least one of the outer cylinder 20 and the inner cylinder 21, the outer cylinder 20 for example, is molded, and the respective lower parts of these outer cylinder and inner cylinder are directly and airtightly bonded. COPYRIGHT: (C)2009,JPO&INPIT |
