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Macroscopic numerical evaluation of heat generation in a bulk high Tc superconductor during pulsed field magnetization

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2 Author(s)
M. Tsuchimoto ; Graduate Sch. of Eng., Hokkaido Univ. Sapporo, Japan ; K. Morikawa

Pulsed-field magnetization of a bulk high Tc superconductor (HTS) is evaluated by using a macroscopic numerical simulation code. Local heat generation in the HTS during the pulsed-field magnetization is discussed to clarify the dynamic magnetization process. Nonlinear dependence of shielding current on the dynamic magnetic field is considered by using the flux flow-creep model. Dependence of flow resistivity on the magnetic field and temperature are also evaluated with the Bardeen-Stephen and the Tinkham models. It is numerically confirmed that reported experimental results are due to a decrease of the shielding current caused by local heat generation.

Published in:

IEEE Transactions on Applied Superconductivity  (Volume:9 ,  Issue: 1 )