Cryogenic current comparator designed for current dependence measurement of 1Ωresistor up to 1A and for superconduction current measurement

摘要

We developed a cryogenic current comparator, to which current of up to 1 A can be supplied. It was designed to be used for a resistance ratio bridge to measure current dependence of a 1Ω resistor from 50 mA to 1 A by comparing it to a 100Ω resistor with small power coefficiency. It was also designed to be inserted in a superconducting coil to measure superconducting current.