TY - JOUR
T1 - Reduction of irregular magnetic field generated by screening current in REBCO coil
AU - Ueda, Hiroshi
AU - Saito, Jun
AU - Ariya, Yuta
AU - Mochida, Ayumu
AU - Wang, Tao
AU - Wang, Xudong
AU - Agatsuma, Koh
AU - Ishiyama, Atsushi
N1 - Publisher Copyright:
© 2002-2011 IEEE.
PY - 2015/6/1
Y1 - 2015/6/1
N2 - In REBCO coils, the screening current flows in the tape in response to the normal component of the linkage flux to the tape's wide face. Generally, the radial component of the magnetic field is large at both ends of the coil winding. Therefore, changes in the winding arrangement may be expected to reduce screening current induction. Furthermore, multifilamentary or narrow REBCO tapes with widths of a few millimeters can be also expected to reduce the magnitude of the screening current. Based on the above considerations, in this paper, we numerically investigated the reduction effect on a magnetic field generated by a screening current in a REBCO coil, due to thinning tape width and varying coil winding arrangements. It was found that the screening field is inversely proportional to the number of tape filaments, whereas a smaller coil winding aspect ratio leads to a decrease in the screening field.
AB - In REBCO coils, the screening current flows in the tape in response to the normal component of the linkage flux to the tape's wide face. Generally, the radial component of the magnetic field is large at both ends of the coil winding. Therefore, changes in the winding arrangement may be expected to reduce screening current induction. Furthermore, multifilamentary or narrow REBCO tapes with widths of a few millimeters can be also expected to reduce the magnitude of the screening current. Based on the above considerations, in this paper, we numerically investigated the reduction effect on a magnetic field generated by a screening current in a REBCO coil, due to thinning tape width and varying coil winding arrangements. It was found that the screening field is inversely proportional to the number of tape filaments, whereas a smaller coil winding aspect ratio leads to a decrease in the screening field.
KW - High-temperature superconductors
KW - irregular magnetic field
KW - screening current
KW - superconducting coils
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U2 - 10.1109/TASC.2014.2375953
DO - 10.1109/TASC.2014.2375953
M3 - Article
AN - SCOPUS:84923872998
VL - 25
JO - IEEE Transactions on Applied Superconductivity
JF - IEEE Transactions on Applied Superconductivity
SN - 1051-8223
IS - 3
M1 - 6971179
ER -