Quench Detection Performance of Lowerature Superconducting Quench Detectors for REBCO Tape in Magnetic Fields

Shin Hasegawa, Satoshi Ito, Gen Nishijima, Hidetoshi Hashizume

Research output: Contribution to journalArticlepeer-review

Abstract

A quench detection method using a lowerature superconducting quench detector (QD) has been proposed to protect rare-earth barium copper oxide (REBCO) coils at temperatures below 20 K in magnetic fields. In this study, we first conducted an experiment at 4.2 K in 0-9 T using a locally- degraded REBCO tape and Nb-Ti QDs (Nb-Ti/Cu, Nb-Ti/Cu-Ni). Quick quench detection before thermal runaway of the REBCO tape was demonstrated by the Nb-Ti/Cu-Ni QD in 0-9 T, whereas Nb-Ti/Cu QD exhibited quick quench detection only at 9 T. Furthermore, we numerically evaluated the quench detection time of Nb-Ti QDs attached to a REBCO tape with local degradation at 4.2 K in 0-9 T. The simulation reproduced the experimental results. Moreover, the contact resistance between the REBCO tape and QD should be lower than 1.0 × 10-3 m2K/W for quick quench detection.

Original languageEnglish
Article number9368969
JournalIEEE Transactions on Applied Superconductivity
Volume31
Issue number5
DOIs
Publication statusPublished - 2021 Aug
Externally publishedYes

Keywords

  • Nb-Ti
  • Quench detection
  • REBCO coil
  • REBCO tape
  • quench detector
  • thermal runaway

ASJC Scopus subject areas

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

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