GB/T 39843-2021 Active National standards

GB/T 39843-2021 Electronic characteristic measurements—Local critical current density and its distribution in large-area superconducting films

Publish Date: 2021-03-09 Implement Date: 2021-10-01 For services related to genuine standard inquiry, procurement, translation, and other related services in China, please Contact Us

Basic Information

Standard Code: GB/T 39843-2021

Standard Type: National standards

Standard Status: Active

is_force_gb: no

CCS Name: Electrician's materials and general parts

ICS Name: The measurement of electrical and magnetic quantities

Publish Date: 2021-03-09

Implement Date: 2021-10-01

Pages: 37 pages

Scope

This standard specifies the method of measuring the local critical current density (Jc) and its distribution of large-area high-temperature superconducting (HTS) films using the three-harmonic voltage induction method. The most important factors in accurate measurement are determining the Jc value in the liquid nitrogen temperature zone by the electric field strength criterion and obtaining the current-voltage characteristics through the frequency dependence of Jc. Although Jc can be measured in the presence of a DC magnetic field [20,21], this standard only applies to cases without a DC magnetic field.
Essentially, this standard measures the critical surface current of the superconducting film, which is the product of Jc and the thickness d of the superconducting film. The measurement range and resolution of Jcd for high-temperature superconducting films are as follows:
——Jcd: from 200 A/m to 32 kA/m (based on experimental results, not limited to);
——Resolution: 100 A/m (based on experimental results, not limited to).