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Development of Advanced Numerical Techniques for Electromagnetic Field Computations for Design of Engineering Application Using High-Temperature Superconductor

Research Project

Project/Area Number 21K04016
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 21010:Power engineering-related
Research InstitutionYamagata University

Principal Investigator

Kamitani Atsushi  山形大学, 大学院理工学研究科, 教授 (00224668)

Project Period (FY) 2021-04-01 – 2024-03-31
Project Status Completed (Fiscal Year 2023)
Budget Amount *help
¥4,160,000 (Direct Cost: ¥3,200,000、Indirect Cost: ¥960,000)
Fiscal Year 2023: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2022: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2021: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Keywords高温超伝導体 / 遮蔽電流密度 / 有限要素法 / 高速多重極法 / H-行列法 / 前処理技術 / 高性能計算 / 鞍点問題 / Krylov空間法
Outline of Research at the Start

本研究では,高温超伝導体中の遮蔽電流密度を評価するための高速・高精度解析技術を開発し,同技術を用いて超伝導応用機器の設計支援ツールを製作する.本研究で開発される技術は数理モデルと数値解析法の2種類に大きく分かれる.

まず,遮蔽電流密度解析には,超伝導状態を記述するための数理モデルが必要となる.本研究の電磁界解析では,数100Hz以下の周波数領域で有効な数理モデルを提案し,その妥当性を数値的に実証する.

次に,遮蔽電流密度方程式を高速に解く数値解析技術を開発する.この技術が実現すれば,複雑形状をした超伝導応用機器中の遮蔽電流密度を高速・高精度に評価することが可能となる.

Outline of Final Research Achievements

For the case where cracks are contained in a high-temperature superconducting thin film, the shielding current analysis in the film reduces to a generalized saddle-point problem. However, it is well known that the problem is difficult to solve numerically. In the present study, four types of methods for solving a generalized saddle-point problem have been developed and they are collectively called a special AiVRM. In addition, it is numerically demonstrated that a special AiVRM can be a powerful tool for a large-scale shielding current analysis.
By implementing a special AiVRM, a numerical code has been developed for shielding current analysis. An acceleration performance of the Superconducting Linear Acceleration (SLA) system is investigated by means of the code. As a result, it is numerically found that the SLA system with a realistic acceleration distance can be realized.

Academic Significance and Societal Importance of the Research Achievements

2050 年までにカーボンニュートラルで持続可能な新しい世界を実現するためには,高温超伝導を含めた革新的科学技術を社会実装する必要がある.特に,高温超伝導体の応用技術は,低炭素社会に対応するためのキーテクノロジーの一つである.近年,高温超伝導応用機器に対してはICT技術の進展に伴うスマート化に対応した高い制御性能も要求される.この意味から,高温超伝導応用機器の設計開発に際しては,超伝導体中を流れる遮蔽電流密度や超伝導体周辺の電磁界の解析が不可欠となっている.本研究は,大規模遮蔽電流密度解析を高速・高精度で実現するための本質的な基礎技術を開発した.

Report

(4 results)
  • 2023 Annual Research Report   Final Research Report ( PDF )
  • 2022 Research-status Report
  • 2021 Research-status Report
  • Research Products

    (33 results)

All 2023 2022 2021

All Journal Article (9 results) (of which Int'l Joint Research: 3 results,  Peer Reviewed: 9 results,  Open Access: 7 results) Presentation (24 results) (of which Int'l Joint Research: 15 results,  Invited: 1 results)

  • [Journal Article] Numerical Investigations on Superconducting Linear Acceleration System by Using Finite Element Method: Influence of Magnet Current on Pellet Velocity2023

    • Author(s)
      TAKAYAMA Teruou、SAITOH Ayumu、KAMITANI Atsushi、NAKAMURA Hiroaki
    • Journal Title

      Plasma and Fusion Research

      Volume: 18 Issue: 0 Pages: 2405055-2405055

    • DOI

      10.1585/pfr.18.2405055

    • ISSN
      1880-6821
    • Year and Date
      2023-07-14
    • Related Report
      2023 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Improved Variable-Reduction Method and Its Variant for Solving Asymmetric EFG-Type Saddle-Point Problem2023

    • Author(s)
      KAMITANI Atsushi、SHINDO Yuito、TAKAYAMA Teruou、NAKAMURA Hiroaki
    • Journal Title

      Plasma and Fusion Research

      Volume: 18 Issue: 0 Pages: 2403039-2403039

    • DOI

      10.1585/pfr.18.2403039

    • ISSN
      1880-6821
    • Year and Date
      2023-05-12
    • Related Report
      2023 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Numerical Approach to Enhanced-Performance of Superconducting Linear Accelerator Using Multiple-Electromagnets2023

    • Author(s)
      Takayama Teruou、Saitoh Ayumu、Kamitani Atsushi
    • Journal Title

      Journal of Advanced Simulation in Science and Engineering

      Volume: 10 Issue: 1 Pages: 21-30

    • DOI

      10.15748/jasse.10.21

    • ISSN
      2188-5303
    • Related Report
      2023 Annual Research Report 2022 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Improved Variable-Reduction Method and Its Variant for Solving Asymmetric EFG-Type Saddle-Point Problem2023

    • Author(s)
      KAMITANI Atsushi、TAKAYAMA Teruou
    • Journal Title

      Plasma and Fusion Research

      Volume: 18

    • Related Report
      2022 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Linear-System Solver for EFG-Type Saddle-Point Problem without Using <i>QR </i>Decomposition2022

    • Author(s)
      KAMITANI Atsushi、TAKAYAMA Teruou、SAITOH Ayumu、NAKAMURA Hiroaki
    • Journal Title

      Plasma and Fusion Research

      Volume: 17 Issue: 0 Pages: 2403014-2403014

    • DOI

      10.1585/pfr.17.2403014

    • ISSN
      1880-6821
    • Year and Date
      2022-03-18
    • Related Report
      2022 Research-status Report 2021 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Numerical Optimization of Electromagnet Current Distribution in Superconducting Linear Acceleration System2022

    • Author(s)
      Takayama T.、Yamaguchi T.、Saitoh A.、Kamitani A.
    • Journal Title

      IEEE Transactions on Applied Superconductivity

      Volume: 32 Issue: 6 Pages: 1-5

    • DOI

      10.1109/tasc.2022.3158374

    • Related Report
      2022 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Multi-Objective Optimization of Superconducting Linear Acceleration System for Pellet Injection by Using Finite Element Method2021

    • Author(s)
      TAKAYAMA Teruou、YAMAGUCHI Takazumi、SAITOH Ayumu、KAMITANI Atsushi、NAKAMURA Hiroaki
    • Journal Title

      Plasma and Fusion Research

      Volume: 16 Issue: 0 Pages: 2401025-2401025

    • DOI

      10.1585/pfr.16.2401025

    • NAID

      130008000730

    • ISSN
      1880-6821
    • Year and Date
      2021-02-19
    • Related Report
      2021 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Improvement of Superconducting Linear Acceleration System for Pellet Injection: Optimization of Current Profile2021

    • Author(s)
      Takayama Teruou、Yamaguchi Takazumi、Saitoh Ayumu、Kamitani Atsushi
    • Journal Title

      IEEE Transactions on Applied Superconductivity

      Volume: 31 Issue: 5 Pages: 1-5

    • DOI

      10.1109/tasc.2021.3064795

    • Related Report
      2021 Research-status Report
    • Peer Reviewed
  • [Journal Article] Acceleration Techniques for Linear-System Solver in Shielding Current Analysis of Cracked HTS Film2021

    • Author(s)
      KAMITANI Atsushi、TAKAYAMA Teruou、SAITOH Ayumu、NAKAMURA Hiroaki
    • Journal Title

      Plasma and Fusion Research

      Volume: 16 Issue: 0 Pages: 2405005-2405005

    • DOI

      10.1585/pfr.16.2405005

    • NAID

      130008000725

    • Related Report
      2021 Research-status Report
    • Peer Reviewed / Open Access
  • [Presentation] High-Performance Linear-System Solver for Asymmetric Saddle- Point Problem Obtained by Discretization with Extended Element-Free Galerkin Method2023

    • Author(s)
      Atsushi Kamitani, Teruou Takayama
    • Organizer
      COMPUMAG2023
    • Related Report
      2023 Annual Research Report
    • Int'l Joint Research
  • [Presentation] FEM Analysis on Performance Improvement of Superconducting Linear Acceleration System2023

    • Author(s)
      Teruou Takayama, Ayumu Saitoh, Atsushi Kamitani
    • Organizer
      COMPUMAG2023
    • Related Report
      2023 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Linear System Solvers for Large-Scale Asymmetric EFG-Type Saddle-Point Problem: Are There Any Variants of AiVRM?2023

    • Author(s)
      Atsushi Kamitani and Teruou Takayama
    • Organizer
      JSST2023
    • Related Report
      2023 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Current profile optimization for improving performance of superconducting linear acceleration system2023

    • Author(s)
      Teruou Takayama, Ayumu Saitoh and Atsushi Kamitani
    • Organizer
      JSST2023
    • Related Report
      2023 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Four Types of Improved Variable-Reduction Methods for Solving Asymmetric EFG-Type Saddle-Point Problem2023

    • Author(s)
      Atsushi Kamitani and Teruou Takayama
    • Organizer
      ISEM2023
    • Related Report
      2023 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Numerical Verification of Performance Improvement for Superconducting Linear Acceleration System2023

    • Author(s)
      Teruou TAKAYAMA, Ayumu SAITOH, Atsushi KAMITANI
    • Organizer
      ISEM2023
    • Related Report
      2023 Annual Research Report
    • Int'l Joint Research
  • [Presentation] FEM による超伝導リニア加速システムの性能検証2023

    • Author(s)
      高山彰優,齋藤歩,神谷淳
    • Organizer
      MAGDA2023
    • Related Report
      2023 Annual Research Report
  • [Presentation] 非対称EFG 型鞍点問題に対する高性能ソルバーの開発:AiVRM の変種は存在 するか?2023

    • Author(s)
      神谷淳,高山彰優
    • Organizer
      MAGDA2023
    • Related Report
      2023 Annual Research Report
  • [Presentation] 超伝導リニア加速システムの数値シミュレーション:電磁石電流が加速性能に及ぼす影響2023

    • Author(s)
      高山彰優
    • Organizer
      【非線形問題の高性能解法と可視化技術に関する研究会】 2022 年度第 1 回研究会
    • Related Report
      2022 Research-status Report
  • [Presentation] X-EFG法により得られた非対称鞍点問題に対する高性能ソルバー:AiVRMとその変種2023

    • Author(s)
      神谷淳
    • Organizer
      【非線形問題の高性能解法と可視化技術に関する研究会】 2022 年度第 1 回研究会
    • Related Report
      2022 Research-status Report
  • [Presentation] High-Performance Linear-System Solver for Asymmetric EFG-Type Saddle-Point Problem2022

    • Author(s)
      Atsushi Kamitani
    • Organizer
      ISEM2022
    • Related Report
      2022 Research-status Report
    • Int'l Joint Research
  • [Presentation] Numerical Simulation of Superconducting Linear Accelerator: Enhanced-Performance of Pellet Injection2022

    • Author(s)
      Teruou Takayama
    • Organizer
      ISEM2022
    • Related Report
      2022 Research-status Report
    • Int'l Joint Research
  • [Presentation] Improved Variable-Reduction Method for Asymmetric Saddle-Point Problem2022

    • Author(s)
      Atsushi Kamitani
    • Organizer
      JSST2022
    • Related Report
      2022 Research-status Report
    • Int'l Joint Research
  • [Presentation] Numerical Approach to Enhanced-Performance of Superconducting Linear Accelerator Using Multiple-Electromagnets2022

    • Author(s)
      Teruou Takayama
    • Organizer
      JSST2022
    • Related Report
      2022 Research-status Report
    • Int'l Joint Research
  • [Presentation] Improved Variable-Reduction Method and Its Variant for Solving Asymmetric EFG-Type Saddle-Point Problem2022

    • Author(s)
      Atsushi Kamitani
    • Organizer
      ITC-31
    • Related Report
      2022 Research-status Report
    • Int'l Joint Research
  • [Presentation] Numerical Investigations on Superconducting Linear Acceleration System by Using Finite Element Method: Influence of Magnet Current on Pellet Velocity2022

    • Author(s)
      Teruou Takayama
    • Organizer
      ITC-31
    • Related Report
      2022 Research-status Report
    • Int'l Joint Research
  • [Presentation] 超伝導リニア加速システムの FEM シミュレーション:電磁石電流がペレット速度に及ぼす影響2022

    • Author(s)
      高山彰優
    • Organizer
      日本応用数理学会2022年度年会
    • Related Report
      2022 Research-status Report
  • [Presentation] 非対称 EFG 型鞍点問題への改良型変数低減法の拡張2022

    • Author(s)
      神谷淳
    • Organizer
      日本応用数理学会2022年度年会
    • Related Report
      2022 Research-status Report
  • [Presentation] High-Performance Solver for EFG-Type Saddle-Point Problem: Improved Variable-Reduction Method2021

    • Author(s)
      Atsushi Kamitani
    • Organizer
      JSST2021
    • Related Report
      2021 Research-status Report
    • Int'l Joint Research
  • [Presentation] Numerical Investigation on Superconducting Linear Acceleration System: Shape Optimization of Current Distribution in Electromagnet2021

    • Author(s)
      Teruou Takayama
    • Organizer
      JSST2021
    • Related Report
      2021 Research-status Report
    • Int'l Joint Research
  • [Presentation] Numerical Optimization of Electromagnet Current Distribution in Superconducting Linear Acceleration System2021

    • Author(s)
      Teruou Takayama
    • Organizer
      MT27
    • Related Report
      2021 Research-status Report
    • Int'l Joint Research
  • [Presentation] EFG型鞍点問題に対する改良型変数低減法の収束特性2021

    • Author(s)
      神谷淳
    • Organizer
      日本応用数理学会2021年度年会
    • Related Report
      2021 Research-status Report
  • [Presentation] 超伝導リニア加速システムの数値シミュレーション:電磁石の形状最適化2021

    • Author(s)
      高山彰優
    • Organizer
      日本応用数理学会2021年度年会
    • Related Report
      2021 Research-status Report
  • [Presentation] EFG型鞍点問題に対する高性能ソルバーの開発:改良型変数低減法2021

    • Author(s)
      神谷淳
    • Organizer
      MAGDA2021
    • Related Report
      2021 Research-status Report

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Published: 2021-04-28   Modified: 2025-01-30  

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