Effects of Cu stabilizer configuration on thermal stability of Nb 3Sn composite superconductors under cryocooling condition

Kenji Watanabe, T. Mitsuhashi, Nozomu Nanato, S. B. Kim, S. Murase, G. Nishijima, Kazuo Watanabe, K. Miyoshi

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)


It is known that current sharing effects of the stabilizer are limited in cryocooling conditions being different from poolboiling. Therefore we have studied stability under it, focusing on minimum quench energy (MQE) of Nb 3Sn superconductors under various conditions of the applied magnetic field, temperature, and the transport current, for various volume fractions and configurations of Cu stabilizer. From the experimental results, the larger the external Cu volume fraction, the higher the MQE was obtained. All MQE data were summarized by only one line in characteristics of normalized MQE and normalized B (B/B c2). The obtained MQE behavior was to be characterized by only one empirical equation. It is thought that the obtained formula is useful for a standard of designing the Nb 3Sn superconductor and its coil under cryocooled condition.

Original languageEnglish
Pages (from-to)3410-3413
Number of pages4
JournalIEEE Transactions on Applied Superconductivity
Issue number2 PART III
Publication statusPublished - Jun 2005


  • Cryocooling
  • MQE
  • Nb Sn wire
  • Thermal stability

ASJC Scopus subject areas

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


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