| 摘要 |
A superconducting magnet system with a superconducting magnet coil system disposed in a cryogenic fluid tank (2) of a cryostat (1), and a refrigerator (6) for cooling the cryogenic fluid that cools the magnet, is characterized in that a radiation shield (5; 21; 31; 41; 51) is provided which separates a refrigerator space (4) from the cryogenic fluid tank (2), wherein the entire cooling region (9) of the refrigerator (6) is disposed in the refrigerator space (4), and wherein the radiation shield (5; 21; 31; 41; 51) has openings (11; 22; 44, 45; 53) for gas or fluid exchange between the refrigerator space (4) and the cryogenic fluid tank (2). Should the refrigerator fail, the thermal input into the cryostat is reduced, and the safety of the maintenance staff is improved in case of a quench.
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