Vapor cooled current lead for cryogenic electrical equipment

Electricity: magnetically operated switches – magnets – and electr – Magnets and electromagnets – Superconductive type

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174 15CA, H01F 722

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active

043946348

ABSTRACT:
Apparatus and method are provided for conducting electric current to cryogenic electrical equipment devices. A combination of inner and outer tubes together form a plurality of hollow composite tubes housed in a sheath. Top and bottom block mounting means are fitted to hold the composite tubes and are affixed to the ends of the sheath. This combination forms a current lead. The current lead is attached to a cryogenic device housing a fluid coolant which moves through the current lead, cooling the current lead as the fluid travels.

REFERENCES:
patent: 3527873 (1970-09-01), Brechna et al.
patent: 3946142 (1976-03-01), Kellow et al.
I.E.E.E. Transactions on Magnetics, vol. MAG-11, No. 2, Mar. 1975, "Flow Instabilities in Gas-Cooled Cryogenic Current Leads".
Cryogenics, Mar. 1976, entitled "Negative Differential Flow Resistance in Super Critical Helium", by V. Arg.

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