The Direct Current Transformer
Among numerous problems of cryogenic engineering there is the one of electrical conduction from an external room temperature source into a low temperature environment. For currents over a few amperes the problem is one of providing electrical conductors of suitable current carrying capacity without introducing excessive thermal conduction. In working at temperatures of liquid helium, the thermal losses quickly result in substantial boil-off, To conduct currents of several hundred amperes would appear totally impractical.
KeywordsCritical Field Critical Magnetic Field Secondary Current Leakage Flux Secondary Circuit
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