Apparatus for Measuring the Critical Current of Superconducting Metal and Alloy Wire Samples in an External Magnetic Field
An apparatus for measuring IK in a transverse magnetic field at 4.2°K is described. The measurements are carried out in a “frozen” field, which eliminates the necessity of continuous supplying the solenoid with current and reduces the amount of helium evaporating as a result of the evolution of Joule heat in nonsuperconducting current leads
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