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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.

- Publication
- IEICE TRANSACTIONS on Electronics Vol.E82-C No.5 pp.766-773

- Publication Date
- 1999/05/25

- Publicized

- Online ISSN

- DOI

- Type of Manuscript
- PAPER

- Category
- Superconductive Electronics

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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},}

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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 -