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AssigneeGeneral Electric Company
InventorsKenneth G. Herd, Evangelos T. Laskaris, Paul S. Thompson
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A superconducting magnet lead assembly for a cryocooler-cooled superconducting magnet having a design current of between generally 50 and 250 amperes. A DBCO (Dysprosium Barium Copper Oxide), YBCO (Yttrium Barium Copper Oxide), or BSCCO (Bismuth Strontium Calcium Copper Oxide) superconducting lead has its ends flexibly, dielectrically, and thermally connected, one end to the generally 30 to 50 Kelvin first stage and the other end to the generally 8 to 30 Kelvin second stage of the cryocooler coldhead. The superconducting lead has a generally constant cross-sectional area along its length. The design current, the lead's length, and the lead's cross-sectional area are chosen such that the design current times the lead's length divided by the lead's cross-sectional area is between generally 720 and 880 amperes per centimeter for a DBCO or YBCO lead and is between generally 180 and 220 amperes per centimeter for a BSCCO lead. The superconducting lead will not itself precipitate a magnet quench (i.e., the superconducting lead does not conduct significant heat between the coldhead stages during the superconductive mode), and the superconducting lead will survive a lead quench from other causes (i.e., the superconducting lead does conduct the resistive heat buildup to the coldhead stages during a lead quench) and thus be acceptable for commercial applications.
A superconducting lead assembly for a superconducting magnet, said superconducting magnet having a design current between generally 50 and 250 amperes, said superconducting magnet cooled by a cryocooler coldhead having a first stage with a first stage design temperature of between generally 30 and 50 Kelvin and having a second stage with a second stage design temperature of between generally 8 and 30 Kelvin, said superconducting lead assembly comprising:
A superconducting lead assembly for a superconducting magnet, said superconducting magnet having a design current between generally 50 and 250 amperes, said superconducting magnet cooled by a cryocooler coldhead having a first stage with a first stage design temperature of between generally 30 and 50 Kelvin and having a second stage with a second stage design temperature of between generally 8 and 30 Kelvin, said superconducting lead assembly comprising:
A superconducting lead assembly for a superconducting magnet, said superconducting magnet having a design current between generally 50 and 250 amperes, said superconducting magnet cooled by a cryocooler coldhead having a first stage with a first stage design temperature of between generally 30 and 50 Kelvin and having a second stage with a second stage design temperature of between generally 8 and 30 Kelvin, said superconducting lead assembly comprising:
Dependencies are inferred from the claim text.