Speedup of Shielding Current Analysis in High-Temperature Superconducting Film: Implementation of H-Matrix Method

• KAMITANI Atsushi

  Yamagata University

• TAKAYAMA Teruou

  Yamagata University

• SAITOH Ayumu

  Yamagata University

• NAKAMURA Hiroaki

  National Institute of Fusion Science

Abstract

Numerical techniques are proposed for accelerating a linear-system solver appearing in the virtual-voltage method. After the proposed techniques are implemented to a numerical code for analyzing the shielding current density in a high-temperature superconducting film, their performance is numerically evaluated. The results of computations show that, if GMRES is incorporated as a linear-system solver, the speed of the virtual-voltage method will be remarkably enhanced. Moreover, it is also found that the implementation of the H-matrix method to matrix-vector multiplications in GMRES will further improve the speed of the virtual voltage method.

Journal

• Plasma and Fusion Research

  Plasma and Fusion Research 11 (0), 2405041-2405041, 2016

  The Japan Society of Plasma Science and Nuclear Fusion Research

Keywords

• high-temperature superconductor
• H-matrix method
• Newton method

Details

• CRID: 1390282680229609984
• NII Article ID: 130005243446
• NII Book ID: AA12346675
• DOI: 10.1585/pfr.11.2405041
• ISSN: 18806821
• HANDLE: 10655/00013334
• Web Site: https://nifs-repository.repo.nii.ac.jp/records/11406
• Web Site: https://www.jstage.jst.go.jp/article/pfr/11/0/11_2405041/_pdf
• Text Lang: en
• Data Source:
  • JaLC
  • IRDB
  • Crossref
  • CiNii Articles
  • KAKEN
• Abstract License Flag: Disallowed