METHOD FOR MEASURING THE CRITICAL PARAMETERS OF FLEXIBLE SAMPLES OF A SUPERCONDUCTOR AND APPARATUS FOR IMPLEMENTATION THEREOF Russian patent published in 2022 - IPC G01R31/00 

FIELD: measuring.

SUBSTANCE: invention relates to methods and apparatus for measuring magnetic and mechanical quantities. Proposed to achieve the technical result is a method for measuring the critical parameters of flexible samples of a superconductor, consisting in passing transport current in a direction perpendicular to the field through the superconductor sample, the ends whereof are connected to the current leads, located in an external magnetic field, and measuring the critical current at the time of voltage drop, wherein the current leads are rigidly fixed on a mandrel with an arc-shaped surface with an arc radius R, or on a rod; the superconductor sample is shaped as an arc with a radius R; the sample is placed in the external magnetic field so that the plane of the arc is perpendicular to the vector of strength of the external magnetic field; a transport current is passed, wherein the direction of the transport current passed through the sample is selected so that the Ampere force is directed towards the convex part of the arc; then, based on the value of induction of the external magnetic field B, the value of transport current I, the radius of the arc R, and the cross section of the sample s, mechanical stresses from the effect of the Ampere force are additionally determined by the formula BTR/s. Also proposed is an apparatus for measuring the critical parameters of flexible samples of a superconductor, containing a magnetic system, installed in the field whereof is the superconductor sample; current leads connected to the ends of the sample; a superconductor sample securing system, and containing a rod with a mandrel rigidly secured thereon with an arc-shaped surface with an arc radius R, whereto the flexible superconductor sample abuts, made in in the form of an arc of the same radius with clamped ends, connected whereto are the current leads fixed rigidly on the mandrel or the rod; wherein the plane of the arc of the superconductor sample is perpendicular to the vector of strength of the external magnetic field, and the current leads have a rounding radius smaller than the radius R at the points of connection with the ends of the superconductor sample.

EFFECT: possibility of simultaneously determining the interdependency of three parameters: the critical current, the external magnetic field, and the tensile mechanical stresses acting on the superconductor.

1 cl