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 articlepeer-review

13 Citations (Scopus)

Abstract

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
Volume11
Issue number1 III
DOIs
Publication statusPublished - 2001 Mar
Event2000 Applied Superconductivity Conference - Virginia Beach, VA, United States
Duration: 2000 Sep 172000 Sep 22

Keywords

  • 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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