Pulsed Field Magnetization of Composite HTS-Structures for Autonomous Magnetic Systems

Abstract

The pulsed field magnetization (PFM) of drilled along c-axis stacks and laser cut tape-slit magnets (TSM) made of high-temperature superconducting tapes of the second generation (HTS-2G) was researched at boiling point of liquid nitrogen. The change of electromagnetic properties at variation of bore’s diameter in the stack of tapes drilled along c-axis was examined. The results of measurement of the screening current evolution during the magnetization and the relaxation of residual magnetic fields are presented. The curves of the induced current dependence on the applied field are presented. The trapped field dependence on the applied field amplitude was examined for both cases. The distribution of the residual field after the magnetization of the stack is measured. The problem of heating of composite structures by a pulsed magnetic field and heat transfer between composite layers was considered. A comparative analysis with the results of experiments on pulsed magnetization of single-domain HTS bulk annuli was performed.