公开(公告)号：US5258573A

公开(公告)日：1993-11-02

申请号：US884442

申请日：1992-05-18

申请人： Takao Sugioka ,  Yoshiro Saji ,  Hiroaki Toda ,  Tetsuo Takagi ,  Masaru Inoue ,  Kohei Otani ,  Manabu Sato

发明人： Takao Sugioka ,  Yoshiro Saji ,  Hiroaki Toda ,  Tetsuo Takagi ,  Masaru Inoue ,  Kohei Otani ,  Manabu Sato

IPC分类号： H01L39/00 ,  H05K9/00 ,  H04B3/28

CPC分类号： H05K9/0077 ,  Y10S505/872

摘要： A large-area superconductor magnetic shield comprising a plurality of small superconductor unit layers stuck onto the surface of a large-area substrate, wherein the external peripheral sections of the adjacent unit layers are overlapped mutually or the end sections of the adjacent unit layers are abutted mutually such that the adjacent unit layers do not make contact with one another. Compared with conventional magnetic shields, the magnetic shielding amount at the overlapping sections of the magnetic shield of the present invention is substantially greater.

公开(公告)号：US5156003A

公开(公告)日：1992-10-20

申请号：US788100

申请日：1991-11-05

申请人： Saji Yoshiro ,  Hiroaki Toda ,  Tetsuo Takagi ,  Takao Sugioka ,  Masaru Inoue ,  Kohei Otani ,  Manabu Sato

发明人： Saji Yoshiro ,  Hiroaki Toda ,  Tetsuo Takagi ,  Takao Sugioka ,  Masaru Inoue ,  Kohei Otani ,  Manabu Sato

IPC分类号： F25B21/00

CPC分类号： F25B21/00 ,  F25B2321/0021 ,  F25B2321/0023 ,  Y02B30/66 ,  Y10S505/891

摘要： A magnetic refrigerator comprising a magnet generating a high-intensity magnetic field, a tube-shaped superconducting magnetic shield, a magnetic working material and a reciprocating means for reciprocatively moving the superconducting magnetic shield or the magnetic working material, the magnetic refrigerator being arranged such that a magnetization process wherein the magnetic working material is magnetized in the high-intensity magnetic field and a demagnetization process wherein the magnetic working material is demagnetized by being accommodated in the hollow section of the magnetic shield are repeated by the reciprocating means so that the magnetic working material generates coldness.By using the property of a tube-shaped superconductor which can shield the magnetism of an external magnetic field passing through the hollow section of the tube and can generate a zero-intensity magnetic field in the hollow section, the magnetic working material magnetized in the high-intensity magnetic field generated by the magnet is inserted into the hollow section of the tube-shaped superconducting shield and is demagnetized in an adiabatic condition to generate coldness. This coldness is used to cool the target cold bath.