High-current cryogenic leads

Details High-current cryogenic leads High-current cryogenic leads

1982-04-09

1984-05-08

Tolin, G. P.

Electricity: conductors and insulators

With fluids or vacuum

With cooling or fluid feeding, circulating or distributing

138 40, 336 62, H01F 508

Patent

active

044476701

ABSTRACT:
A cryogenic lead is described which comprises a plurality of tubular conductors arranged in parallel association and connected to two conductive blocks. Each tubular conductor is a laminar assembly of an inner conductive sleeve and an outer sleeve which acts as a thermal mass to absorb heat from the inner sleeve during thermal perturbations. A fluid refrigerant is directed through the tubular conductors. Each tubular conductor has at least one flow restrictor disposed within its inner sleeve to reduce the relative effect of changes of refrigerant viscosity on pressure drop within the tubular conductor and to block the transmission of thermal radiation through the tubular conductor.

REFERENCES:
patent: 3427815 (1969-02-01), Pitlor
patent: 3611227 (1971-10-01), Trabut
patent: 3693648 (1972-09-01), Sassin
patent: 3835239 (1974-09-01), Schmidt
patent: 3849589 (1974-11-01), Schmidt et al.
patent: 4369636 (1983-01-01), Porcell et al.
Hilal, M. A. et al, "A Method for Preventing Pressure Oscillations in Tubes Connecting Liquid Helium Reservoirs to Room Temperature", Cryogenics, vol. 16, No. 2, Feb. 1976, p. 122.

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