METHOD AND SYSTEM FOR MEASURING CRITICAL CURRENT PROPERTY OF SUPERCONDUCTIVE WIRE ROD

摘要

PROBLEM TO BE SOLVED: To provide a method and a system for measuring a critical current property of a superconductive wire rod, which can obtain high measurement sensitivity without damaging the surface of the wire rod when carrying out a measurement, while keeping high measurement accuracy even in the case a coil property of the wire rod is evaluated in a permanent current mode. SOLUTION: In the method, a pancake coil 1 made up by spirally winding the long superconductive wire rod 30 that is an object to be measured is arranged in relation to a cancel coil 2 made up by winding a metal wire so as to generate a mutual inductive field, and the critical current property of the superconductive wire rod 30 is determined by measuring a voltage value between both edges of the superconductive wire rod 30 in such a state that an inductance component voltage value VLoccurring in the pancake coil 1 is canceled by adding the voltage value VLto an induced voltage value V2 with a reverse polarity occurring in the cancel coil 2 when energizing the pancake coil 1. COPYRIGHT: (C)2004,JPO