Experimental and numerical investigation of screening currents induced in a Bi-2223/Ag double pancake coil for space applications

Y. Nagasaki; T. Nakamura; I. Funaki; Y. Ashida; H. Yamakawa

doi:10.1088/0953-2048/27/11/115005

Experimental and numerical investigation of screening currents induced in a Bi-2223/Ag double pancake coil for space applications

Y. Nagasaki, T. Nakamura, I. Funaki, Y. Ashida, H. Yamakawa

Research output: Contribution to journal › Article › peer-review

4 Citations (Scopus)

Abstract

We modelled the screening currents (I_s) induced in high-temperature superconducting (HTS) coils to develop a method for the characterization and design of HTS magnets for space applications. The analysis made use of so-called percolation depinning and flux creep models to describe the current density versus the electric field in HTS tapes. We compared the model results with the experimental data obtained from a Bi-2223/Ag double pancake coil. The experimental residual magnetization due to the I_sin the Bi-2223/Ag coil can be effectively modelled, assuming an equivalent loop length of approximately 9 mm for the I_sin the coil. The values calculated from the method quantitatively agreed with the results for various experimental conditions. We also successfully modelled the hysteresis of the magnetization due to the I_s. These results demonstrate the validity of our model for the I_s, which considers the effects of flux creep and smaller I_sloops in the multi-filamentary Bi-2223/Ag tape.

Original language	English
Article number	115005
Journal	Superconductor Science and Technology
Volume	27
Issue number	11
DOIs	https://doi.org/10.1088/0953-2048/27/11/115005
Publication status	Published - 2014 Nov 1
Externally published	Yes

Keywords

Bi-2223/Ag coil
flux creep
percolation model
screening current
space application

ASJC Scopus subject areas

Ceramics and Composites
Condensed Matter Physics
Metals and Alloys
Electrical and Electronic Engineering
Materials Chemistry

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10.1088/0953-2048/27/11/115005

Cite this

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title = "Experimental and numerical investigation of screening currents induced in a Bi-2223/Ag double pancake coil for space applications",

abstract = "We modelled the screening currents (Is) induced in high-temperature superconducting (HTS) coils to develop a method for the characterization and design of HTS magnets for space applications. The analysis made use of so-called percolation depinning and flux creep models to describe the current density versus the electric field in HTS tapes. We compared the model results with the experimental data obtained from a Bi-2223/Ag double pancake coil. The experimental residual magnetization due to the Isin the Bi-2223/Ag coil can be effectively modelled, assuming an equivalent loop length of approximately 9 mm for the Isin the coil. The values calculated from the method quantitatively agreed with the results for various experimental conditions. We also successfully modelled the hysteresis of the magnetization due to the Is. These results demonstrate the validity of our model for the Is, which considers the effects of flux creep and smaller Isloops in the multi-filamentary Bi-2223/Ag tape.",

keywords = "Bi-2223/Ag coil, flux creep, percolation model, screening current, space application",

author = "Y. Nagasaki and T. Nakamura and I. Funaki and Y. Ashida and H. Yamakawa",

note = "Publisher Copyright: {\textcopyright} 2014 IOP Publishing Ltd.",

year = "2014",

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day = "1",

doi = "10.1088/0953-2048/27/11/115005",

language = "English",

volume = "27",

journal = "Superconductor Science and Technology",

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T1 - Experimental and numerical investigation of screening currents induced in a Bi-2223/Ag double pancake coil for space applications

AU - Nagasaki, Y.

AU - Nakamura, T.

AU - Funaki, I.

AU - Ashida, Y.

AU - Yamakawa, H.

PY - 2014/11/1

Y1 - 2014/11/1

N2 - We modelled the screening currents (Is) induced in high-temperature superconducting (HTS) coils to develop a method for the characterization and design of HTS magnets for space applications. The analysis made use of so-called percolation depinning and flux creep models to describe the current density versus the electric field in HTS tapes. We compared the model results with the experimental data obtained from a Bi-2223/Ag double pancake coil. The experimental residual magnetization due to the Isin the Bi-2223/Ag coil can be effectively modelled, assuming an equivalent loop length of approximately 9 mm for the Isin the coil. The values calculated from the method quantitatively agreed with the results for various experimental conditions. We also successfully modelled the hysteresis of the magnetization due to the Is. These results demonstrate the validity of our model for the Is, which considers the effects of flux creep and smaller Isloops in the multi-filamentary Bi-2223/Ag tape.

AB - We modelled the screening currents (Is) induced in high-temperature superconducting (HTS) coils to develop a method for the characterization and design of HTS magnets for space applications. The analysis made use of so-called percolation depinning and flux creep models to describe the current density versus the electric field in HTS tapes. We compared the model results with the experimental data obtained from a Bi-2223/Ag double pancake coil. The experimental residual magnetization due to the Isin the Bi-2223/Ag coil can be effectively modelled, assuming an equivalent loop length of approximately 9 mm for the Isin the coil. The values calculated from the method quantitatively agreed with the results for various experimental conditions. We also successfully modelled the hysteresis of the magnetization due to the Is. These results demonstrate the validity of our model for the Is, which considers the effects of flux creep and smaller Isloops in the multi-filamentary Bi-2223/Ag tape.

KW - Bi-2223/Ag coil

KW - flux creep

KW - percolation model

KW - screening current

KW - space application

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DO - 10.1088/0953-2048/27/11/115005

M3 - Article

AN - SCOPUS:84907907261

VL - 27

JO - Superconductor Science and Technology

JF - Superconductor Science and Technology

SN - 0953-2048

IS - 11

M1 - 115005

ER -

Experimental and numerical investigation of screening currents induced in a Bi-2223/Ag double pancake coil for space applications

Abstract

Keywords

ASJC Scopus subject areas

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