Simulation of Contactless Crack Detection in HTS Films: Application of <i>H</i>-Matrix Method to Fast Matrix-Vector Multiplication

• TAKAYAMA Teruou

  Department of Informatics, Yamagata University

• SAITOH Ayumu

  Graduate School of Science and Engineering, Yamagata University

• KAMITANI Atsushi

  Graduate School of Science and Engineering, Yamagata University

• NAKAMURA Hiroaki

  National Institute for Fusion Science

Bibliographic Information

Other Title

• Simulation of Contactless Crack Detection in HTS Films: Application of H-Matrix Method to Fast Matrix-Vector Multiplication

Abstract

Detectability of the multiple cracks in a high-temperature superconducting (HTS) film by a scanning permanent magnet method has been investigated numerically. To this end, a numerical code has been developed for performing a shielding current analysis in an HTS film with cracks. Furthermore, the GMRES(k) method and the H-matrix method are adopted in the code. By using the code, the scanning permanent magnet method can be simulated successfully. The results of the computations show that the x-coordinate of the crack endpoint cannot be estimated with increasing the magnet radius. On the other hand, the y-coordinate of the crack endpoint can be detected accurately.

Journal

• Plasma and Fusion Research

  Plasma and Fusion Research 11 (0), 2401043-2401043, 2016

  The Japan Society of Plasma Science and Nuclear Fusion Research

Keywords

• crack detection
• FEM
• high-temperature superconductor
• permanent magnet
• simulation

Details

• CRID: 1390282680231579648
• NII Article ID: 130005330471
• NII Book ID: AA12346675
• DOI: 10.1585/pfr.11.2401043
• ISSN: 18806821
• HANDLE: 10655/00013336
• Web Site: https://nifs-repository.repo.nii.ac.jp/records/11408
• Web Site: https://www.jstage.jst.go.jp/article/pfr/11/0/11_2401043/_pdf
• Text Lang: en
• Data Source:
  • JaLC
  • IRDB
  • Crossref
  • CiNii Articles
  • KAKEN
• Abstract License Flag: Disallowed