METHOD OF CRITICAL CURRENT DETERMINING FOR HT SUPERCONDUCTING MATERIAL Y-Ba-Cu-O

摘要

FIELD: superconducting material manufacturing and investigating. SUBSTANCE: method is based on ring-type induction current exciting at sample flat surface of superconducting material. Induction coil is feeding by alternative current with amplitude growing slowly operation at frequency 340-360 kc. Reception coil gives output quasysinusoidal signal which potential dropping section corresponds to induction coil current maximum value. Critical current value is determining as amplitude of induction coil current value at the moment when reception coil signal potential fall down bottom exceeds zero level. EFFECT: higher productivity of indestructible operating, polyfilm structure testing is possible.