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Numerical investigations on relation between critical current density and third harmonic voltage in HTS

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3 Author(s)
Kamitani, A. ; Dept. of Informatics, Yamagata Univ., Japan ; Ikuno, S. ; Yokono, T.

The inductive method for measuring the critical current density is investigated by using the numerical simulation. When the high-temperature superconductor is exposed to the magnetic field generated by the ac coil current, the voltage induced in the coil contains not only a linear component but higher harmonics. The harmonic voltages are numerically calculated as a function of the coil current. The results of computations show that, above a certain limit of the coil current, the third harmonic voltage is suddenly excited. In addition, it is also found that the square root of the third harmonic voltage is approximately a linear function of the coil current.

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Applied Superconductivity, IEEE Transactions on  (Volume:15 ,  Issue: 2 )