TY - JOUR
T1 - Measurement and Simulation of Magnetic Field Generated by Screening Currents in HTS Coil
AU - Ueda, Hiroshi
AU - Fukuda, Mitsuhiro
AU - Hatanaka, Kichiji
AU - Michitsuji, Kenta
AU - Karino, Hiraku
AU - Wang, Tao
AU - Wang, Xudong
AU - Ishiyama, Atsushi
AU - Noguchi, So
AU - Yanagisawa, Yoshinori
AU - Maeda, Hideaki
PY - 2014/6/1
Y1 - 2014/6/1
N2 - In coils wound with high-temperature superconducting (HTS) tapes, large screening currents are induced in the tape by the radial component of the magnetic field. Furthermore, when a transport current is supplied to the HTS tape under a magnetic field, the total current (which consists of the transport and screening currents) flows inhomogeneously. The magnetic field generated by the screening currents affects the magnetic field distribution in cyclotron applications. Investigating the effects of the screening currents on the reduction, hysteresis, and drift of the magnetic field in the HTS coil is therefore necessary. In our previous studies, we have developed a novel simulation code for a three-dimensional electromagnetic field with the aim of clarifying these effects. In the present study, we measured the reduction and hysteresis of the magnetic field generated by the screening currents for a small model of HTS pancake coil. Additionally, we numerically investigated the influence of the screening current in the HTS coil on the spatial and temporal behavior of the magnetic field using our developed simulation code, which considers the nonlinear voltage - current characteristics.
AB - In coils wound with high-temperature superconducting (HTS) tapes, large screening currents are induced in the tape by the radial component of the magnetic field. Furthermore, when a transport current is supplied to the HTS tape under a magnetic field, the total current (which consists of the transport and screening currents) flows inhomogeneously. The magnetic field generated by the screening currents affects the magnetic field distribution in cyclotron applications. Investigating the effects of the screening currents on the reduction, hysteresis, and drift of the magnetic field in the HTS coil is therefore necessary. In our previous studies, we have developed a novel simulation code for a three-dimensional electromagnetic field with the aim of clarifying these effects. In the present study, we measured the reduction and hysteresis of the magnetic field generated by the screening currents for a small model of HTS pancake coil. Additionally, we numerically investigated the influence of the screening current in the HTS coil on the spatial and temporal behavior of the magnetic field using our developed simulation code, which considers the nonlinear voltage - current characteristics.
KW - HTS coil
KW - hysteresis
KW - magnetic field distribution
KW - screening current
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U2 - 10.1109/TASC.2014.2299537
DO - 10.1109/TASC.2014.2299537
M3 - Article
AN - SCOPUS:84921330894
VL - 24
JO - IEEE Transactions on Applied Superconductivity
JF - IEEE Transactions on Applied Superconductivity
SN - 1051-8223
IS - 3
M1 - 6709817
ER -