Preferential Magnetic Flux Invasion and Heat Generation Owing to Macrostructure in HTS Bulk Magnets in Pulse Field Magnetization Processes


In order to clarify the behavior of the magnetic flux that invade into the melt-processed Dy123-based high-temperature superconducting bulk magnet, the motions of magnetic fluxes and also the phenomena of warmth generation were exactly measured during the pulsed field magnetization processes. In the experiments, we have a tendency to estimated the time evolutional profiles that were measured at two portions in the growth sector region and the expansion sector boundary. They are characterised because the areas of lower and better essential current densities than each alternative, respectively. The serial pulsed magnetic fields of five T were applied to the sample at 30 K, and the info were obtained in flip by the Hall sensor and thermometer that were place at several positions along the radial rows on the growth sector boundary and the growth sector region. The profiles of magnetic flux during the pulsed field application really proved that the magnetic flux invades the sample through the growth sector regions in shorter time and with stronger magnitude than through the growth sector boundaries. Since the low magnetic field application results in low heat generation, it's expected to attain the upper trapped field performances than ever.

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