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

被引：41

作者：

Bræck, S

Shantsev, DV

Johansen, TH

Galperin, YM

机构：

[1] Univ Oslo, Dept Phys, N-0316 Oslo, Norway

[2] AF Ioffe Phys Tech Inst, St Petersburg 194021, Russia

来源：

JOURNAL OF APPLIED PHYSICS | 2002年 / 92卷 / 10期

关键词：

D O I：

10.1063/1.1515098

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

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 Phi is maximum for an optimal value B-opt of the maximal applied field. We analyze how B-opt and Phi depend on the material parameters and the field ramp rate. (C) 2002 American Institute of Physics.

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页码：6235 / 6240

页数：6

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