PROJECT TITLE :
Magnetic Shielding Characteristics of Second Generation High Temperature Superconductors at Variable Temperatures Obtained by Cryogenic Helium Gas Circulation
Magnetic shielding characteristics of 40 mm wide second generation high temperature superconducting (2GHTS) materials were studied at variable temperatures. Shielding characteristics were measured in DC and variable frequency AC magnetic fields at a vary of magnitudes up to sixty mT. Magnetic shields fabricated in the shape of short cylinders were studied with magnetic field perpendicular to their axis. Shielding properties of single and double layer shields were compared at varied temperatures between fifty and 80 K. Shielding factor up to ninety eightp.c was achieved. The benefit of lower temperatures is significantly visible at higher magnetic fields. Trends of protecting characteristics modeled as a operate of external magnetic field strength with finite element models using COMSOL match with those of the experimental observations.
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