Superconducting trapped-field magnets: Temperature and field distributions during pulsed field activation

Details Superconducting trapped-field magnets: Temperature and field distributions during pulsed field activation Superconducting trapped-field magnets: Temperature and field distributions during pulsed field activation

2002-05-10

arxiv.org/abs/cond-mat/0205229v1

J. Appl. Phys. v.92, No. 10, pp.6235-6240 (2002)

Physics

Condensed Matter

Superconductivity

6 pages, 6 figures, submitted to J.Appl.Phys., will be presented at ASC-2002

Scientific paper

10.1063/1.1515098

We calculate the temperature and magnetic field distributions in a bulk superconductor during the process of pulsed-field magnetic activation. The calculations are based on the heat diffusion equation with account of the heat produced by flux motion, and the critical state model with temperature dependent critical current density. For a given activation time the total amount of trapped flux is maximum for an optimal value B_opt of the maximal applied field. We analyze how B_opt and the trapped flux depend on the material parameters and the field ramp rate.

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