Numerical Evaluation of Electromagnetic Behavior of Multi-Stacked No-Insulation REBCO Coil System for Whole-Body MRIs and Medical Cyclotrons

Ui Nemoto; Kyoka Tsuyoshi; Mayu Kitamura; Atsushi Ishiyama; So Noguchi

doi:10.1109/TASC.2022.3170324

Numerical Evaluation of Electromagnetic Behavior of Multi-Stacked No-Insulation REBCO Coil System for Whole-Body MRIs and Medical Cyclotrons

Ui Nemoto, Kyoka Tsuyoshi, Mayu Kitamura, Atsushi Ishiyama, So Noguchi

School of Advanced Science and Engineering

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

Abstract

We have been developing a no-insulation (NI) REBCO pancake coil technology for applications in medical cyclotrons and high-field whole-body MRI. The thermal and electromagnetic behaviors of multi-stacked NI-REBCO double pancake coils are numerically analyzed in this study when a local defect occurs in one coil using coil diameter and operating temperature parameters. Based on changes in voltage at both ends of the coil and the magnetic field at the center, we present a numerical study of the possibility of continuous operation after the occurrence of a local defect. In the numerical analysis, a new simplified model based on the PEEC model (Partial Element Equivalent Circuit model) is suggested and used for current distribution analysis, and the results are compared.

Original language	English
Journal	IEEE Transactions on Applied Superconductivity
DOIs	https://doi.org/10.1109/TASC.2022.3170324
Publication status	Accepted/In press - 2022

Keywords

Analytical models
cyclotron
defect
Equivalent circuits
Integrated circuit modeling
Magnetic fields
Magnetic resonance imaging
Mixture models
MRI
no-insulation coil
REBCO-coated conductor
thermal stability
Voltage

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics
Electrical and Electronic Engineering

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10.1109/TASC.2022.3170324

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title = "Numerical Evaluation of Electromagnetic Behavior of Multi-Stacked No-Insulation REBCO Coil System for Whole-Body MRIs and Medical Cyclotrons",

abstract = "We have been developing a no-insulation (NI) REBCO pancake coil technology for applications in medical cyclotrons and high-field whole-body MRI. The thermal and electromagnetic behaviors of multi-stacked NI-REBCO double pancake coils are numerically analyzed in this study when a local defect occurs in one coil using coil diameter and operating temperature parameters. Based on changes in voltage at both ends of the coil and the magnetic field at the center, we present a numerical study of the possibility of continuous operation after the occurrence of a local defect. In the numerical analysis, a new simplified model based on the PEEC model (Partial Element Equivalent Circuit model) is suggested and used for current distribution analysis, and the results are compared.",

keywords = "Analytical models, cyclotron, defect, Equivalent circuits, Integrated circuit modeling, Magnetic fields, Magnetic resonance imaging, Mixture models, MRI, no-insulation coil, REBCO-coated conductor, thermal stability, Voltage",

author = "Ui Nemoto and Kyoka Tsuyoshi and Mayu Kitamura and Atsushi Ishiyama and So Noguchi",

note = "Publisher Copyright: IEEE",

year = "2022",

doi = "10.1109/TASC.2022.3170324",

language = "English",

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AU - Nemoto, Ui

AU - Tsuyoshi, Kyoka

AU - Kitamura, Mayu

AU - Ishiyama, Atsushi

AU - Noguchi, So

N1 - Publisher Copyright: IEEE

PY - 2022

Y1 - 2022

N2 - We have been developing a no-insulation (NI) REBCO pancake coil technology for applications in medical cyclotrons and high-field whole-body MRI. The thermal and electromagnetic behaviors of multi-stacked NI-REBCO double pancake coils are numerically analyzed in this study when a local defect occurs in one coil using coil diameter and operating temperature parameters. Based on changes in voltage at both ends of the coil and the magnetic field at the center, we present a numerical study of the possibility of continuous operation after the occurrence of a local defect. In the numerical analysis, a new simplified model based on the PEEC model (Partial Element Equivalent Circuit model) is suggested and used for current distribution analysis, and the results are compared.

AB - We have been developing a no-insulation (NI) REBCO pancake coil technology for applications in medical cyclotrons and high-field whole-body MRI. The thermal and electromagnetic behaviors of multi-stacked NI-REBCO double pancake coils are numerically analyzed in this study when a local defect occurs in one coil using coil diameter and operating temperature parameters. Based on changes in voltage at both ends of the coil and the magnetic field at the center, we present a numerical study of the possibility of continuous operation after the occurrence of a local defect. In the numerical analysis, a new simplified model based on the PEEC model (Partial Element Equivalent Circuit model) is suggested and used for current distribution analysis, and the results are compared.

KW - Analytical models

KW - cyclotron

KW - defect

KW - Equivalent circuits

KW - Integrated circuit modeling

KW - Magnetic fields

KW - Magnetic resonance imaging

KW - Mixture models

KW - MRI

KW - no-insulation coil

KW - REBCO-coated conductor

KW - thermal stability

KW - Voltage

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Numerical Evaluation of Electromagnetic Behavior of Multi-Stacked No-Insulation REBCO Coil System for Whole-Body MRIs and Medical Cyclotrons

Abstract

Keywords

ASJC Scopus subject areas

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