The original paper is in English. Non-English content has been machine-translated and may contain typographical errors or mistranslations. ex. Some numerals are expressed as "XNUMX".
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The original paper is in English. Non-English content has been machine-translated and may contain typographical errors or mistranslations. Copyrights notice
Les performances de blindage magnétique de la plaque supraconductrice à haute Tc (HTS) dans un état mixte ont été étudiées numériquement. En tenant compte de l'anisotropie cristallographique de la plaque HTS, la plaque de blindage axisymétrique est supposée avoir une structure à couches minces multiples. Sous ces hypothèses, les équations régissant la densité de courant de blindage peuvent être exprimées en termes de fonction scalaire. Le code numérique pour intégrer l'équation a été développé et, grâce à l'utilisation du code, la densité de courant de blindage et le coefficient d'amortissement sont calculés pour la plaque HTS axisymétrique dans un état mixte. Les résultats des calculs montrent que la densité de courant de blindage se localise autour du bord sous le champ magnétique haute fréquence. Avec une fréquence croissante du champ magnétique appliqué, la localisation devient remarquable et la densité de courant de blindage augmente jusqu'à ce que le flux de flux se produise. De plus, les performances de blindage magnétique de la plaque HTS changent considérablement avec le temps sous le champ magnétique basse fréquence inférieur à 100 Hz, alors qu'elles sont presque indépendantes du temps sous le champ magnétique haute fréquence. De plus, il s’avère que la plaque HTS peut protéger les champs magnétiques alternatifs à haute fréquence même si elle reste dans un état mixte.
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Atsushi KAMITANI, Shigetoshi OHSHIMA, "Magnetic Shielding Analysis of Axisymmetric HTS Plates in Mixed State" in IEICE TRANSACTIONS on Electronics,
vol. E82-C, no. 5, pp. 766-773, May 1999, doi: .
Abstract: The magnetic shielding performance of the high-Tc superconducting (HTS) plate in a mixed state has been investigated numerically. By taking account of the crystallographic anisotropy of the HTS plate, the axisymmetric shielding plate is assumed to have a multiple thin-layer structure. Under the assumptions, the governing equations of the shielding current density can be expressed in terms of a scalar function. The numerical code to integrate the equation has been developed and, by use of the code, the shielding current density and the damping coefficient are calculated for the axisymmetric HTS plate in a mixed state. The results of computations show that the shielding current density localizes around the edge under the high-frequency magnetic field. With an increasing frequency of the applied magnetic field, the localization becomes remarkable and the shielding current density becomes larger until the flux flow occurs. In addition, the magnetic shielding performance of the HTS plate drastically changes with time under the low-frequency magnetic field below 100 Hz, whereas it is almost time-independent under the high-frequency magnetic field. Moreover, it turns out that the HTS plate can shield ac magnetic fields with a high frequency even if it remains in a mixed state.
URL: https://global.ieice.org/en_transactions/electronics/10.1587/e82-c_5_766/_p
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@ARTICLE{e82-c_5_766,
author={Atsushi KAMITANI, Shigetoshi OHSHIMA, },
journal={IEICE TRANSACTIONS on Electronics},
title={Magnetic Shielding Analysis of Axisymmetric HTS Plates in Mixed State},
year={1999},
volume={E82-C},
number={5},
pages={766-773},
abstract={The magnetic shielding performance of the high-Tc superconducting (HTS) plate in a mixed state has been investigated numerically. By taking account of the crystallographic anisotropy of the HTS plate, the axisymmetric shielding plate is assumed to have a multiple thin-layer structure. Under the assumptions, the governing equations of the shielding current density can be expressed in terms of a scalar function. The numerical code to integrate the equation has been developed and, by use of the code, the shielding current density and the damping coefficient are calculated for the axisymmetric HTS plate in a mixed state. The results of computations show that the shielding current density localizes around the edge under the high-frequency magnetic field. With an increasing frequency of the applied magnetic field, the localization becomes remarkable and the shielding current density becomes larger until the flux flow occurs. In addition, the magnetic shielding performance of the HTS plate drastically changes with time under the low-frequency magnetic field below 100 Hz, whereas it is almost time-independent under the high-frequency magnetic field. Moreover, it turns out that the HTS plate can shield ac magnetic fields with a high frequency even if it remains in a mixed state.},
keywords={},
doi={},
ISSN={},
month={May},}
Copier
TY - JOUR
TI - Magnetic Shielding Analysis of Axisymmetric HTS Plates in Mixed State
T2 - IEICE TRANSACTIONS on Electronics
SP - 766
EP - 773
AU - Atsushi KAMITANI
AU - Shigetoshi OHSHIMA
PY - 1999
DO -
JO - IEICE TRANSACTIONS on Electronics
SN -
VL - E82-C
IS - 5
JA - IEICE TRANSACTIONS on Electronics
Y1 - May 1999
AB - The magnetic shielding performance of the high-Tc superconducting (HTS) plate in a mixed state has been investigated numerically. By taking account of the crystallographic anisotropy of the HTS plate, the axisymmetric shielding plate is assumed to have a multiple thin-layer structure. Under the assumptions, the governing equations of the shielding current density can be expressed in terms of a scalar function. The numerical code to integrate the equation has been developed and, by use of the code, the shielding current density and the damping coefficient are calculated for the axisymmetric HTS plate in a mixed state. The results of computations show that the shielding current density localizes around the edge under the high-frequency magnetic field. With an increasing frequency of the applied magnetic field, the localization becomes remarkable and the shielding current density becomes larger until the flux flow occurs. In addition, the magnetic shielding performance of the HTS plate drastically changes with time under the low-frequency magnetic field below 100 Hz, whereas it is almost time-independent under the high-frequency magnetic field. Moreover, it turns out that the HTS plate can shield ac magnetic fields with a high frequency even if it remains in a mixed state.
ER -