METHOD FOR MAGNETIZING A SUPERCONDUCTOR BULK MAGNET, WITH GENERATING AN AUXILIARY MAGNETIC FIELD IN THE SUPERCONDUCTOR BORE

摘要

A superconductor bulk magnet magnetizing method providing a more homogenous trapped magnetic field includes: placing the bulk magnet inside a charger bore of an electrical charger magnet; placing a field correction unit inside a superconductor bore of the bulk magnet; applying an electrical current (I₀) to the charger magnet, to generate an externally applied magnetic field, wherein a temperature T_bulk of the bulk magnet exceeds a bulk magnet critical temperature T_c; applying an auxiliary electrical current (I₁, . . . ) to the field correction unit, thus generating an auxiliary magnetic field applied to the bulk magnet from within the superconductor bore, wherein T_bulkT_c; lowering T_bulk below T_c; turning off the electrical current at the charger magnet, wherein T_bulkT_c, and turning off the auxiliary electrical current at the field correction unit, wherein T_bulkT_c; and removing the bulk magnet from the charger bore while T_bulkT_c.