TY - JOUR

T1 - Finite element analysis of pulsed field magnetization process in a cylindrical bulk superconductor

AU - Kajikawa, Kazuhiro

AU - Yokoo, R.

AU - Tomachi, K.

AU - Enpuku, Keiji

AU - Funaki, K.

AU - Hayashi, H.

AU - Fujishiro, H.

PY - 2008/9/15

Y1 - 2008/9/15

N2 - The magnetization properties in a cylindrical superconductor with an infinite length exposed to a pulsed external magnetic field are numerically evaluated by means of a coupled finite element method. In order to estimate the distributions of magnetic field and temperature inside the superconductor, magnetic diffusion and heat balance equations are alternately and iteratively solved at each time step. It is assumed that the superconductor has a transport property represented by the power-law model, where the critical current density depends on the local temperature. The adiabatic condition for the thermal analysis is also used, so that the temperature rise comes from the local energy dissipation due to the magnetic flux motion. The influences of the strength of external applied field and the initial temperature in the superconductor on the final trapped magnetic field are investigated toward an optimal design of bulk superconductor magnet.

AB - The magnetization properties in a cylindrical superconductor with an infinite length exposed to a pulsed external magnetic field are numerically evaluated by means of a coupled finite element method. In order to estimate the distributions of magnetic field and temperature inside the superconductor, magnetic diffusion and heat balance equations are alternately and iteratively solved at each time step. It is assumed that the superconductor has a transport property represented by the power-law model, where the critical current density depends on the local temperature. The adiabatic condition for the thermal analysis is also used, so that the temperature rise comes from the local energy dissipation due to the magnetic flux motion. The influences of the strength of external applied field and the initial temperature in the superconductor on the final trapped magnetic field are investigated toward an optimal design of bulk superconductor magnet.

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U2 - 10.1016/j.physc.2008.05.062

DO - 10.1016/j.physc.2008.05.062

M3 - Article

AN - SCOPUS:50349103364

VL - 468

SP - 1494

EP - 1497

JO - Physica C: Superconductivity and its Applications

JF - Physica C: Superconductivity and its Applications

SN - 0921-4534

IS - 15-20

ER -