Normal zone propagation and quench characteristics of Nb 3Sn wires with jelly-roll and in-situ processed CuNb reinforcements

Satoru Murase, Tomoyuki Murakami, Toshiyuki Seto, Susumu Shimamoto, Satoshi Awaji, Kazuo Watanabe, Takashi Saito, Genzo Iwaki, Shin Ichiro Meguro

Research output: Contribution to journalConference article

13 Citations (Scopus)


The stability of three types of CuNb reinforced Nb 3Sn wires has been experimentally studied in order to clarify effects of critical current density, J c, and Nb fraction in CuNb reinforcements. The stabilities, i.e., minimum quench energy, MQE, and normal zone propagation velocity, v p, were evaluated for sample wires having low J c and low Nb fraction (A) and high J c and low Nb fraction (B) with in-situ processed CuNb reinforcement and high J c and high Nb fraction with jelly-roll processed CuNb reinforcement (C). The MQE decreased with increase in transport current density normalized by J c, critical generation density, and Nb fraction, on the other hand, v p increased with increasing the transport current density, regardless of Nb fraction. We obtained basic data for the design of magnets having both a high stability and mechanical strength.

Original languageEnglish
Pages (from-to)3627-3630
Number of pages4
JournalIEEE Transactions on Applied Superconductivity
Issue number1 III
Publication statusPublished - 2001 Mar 1
Event2000 Applied Superconductivity Conference - Virginia Beach, VA, United States
Duration: 2000 Sep 172000 Sep 22


  • Composite wire
  • CuNb reinforcement
  • Nb Sn
  • Normal zone propagation
  • Quench
  • Stability
  • Superconductor

ASJC Scopus subject areas

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

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