Ic enhancement effect in Nb3Sn coils fabricated by the react-and-wind method

K. Miyoshi, Satoshi Awaji, Hidetoshi Oguro, G. Nishijima, Kazuo Watanabe

Research output: Chapter in Book/Report/Conference proceedingConference contribution

3 Citations (Scopus)

Abstract

We found that critical current Ic, upper critical field B c2 and critical temperature Tc are greatly enhanced by pre-bending treatment for bronze route Nb3Sn superconductors, called the pre-bending effect. The superconducting properties of Nb3Sn superconductor are sensitive to strain. However, a pre-bending treatment of the Nb3Sn wire enhances the properties. This is because the treatment causes relaxation of the residual strain in the Nb3Sn layer in the wire. Interestingly, the pre-bending effect also makes the Nb3Sn wire stronger against strain. By using this effect, the react-and-wind (R&W) method is expected to be applicable for the fabrication of the Nb3Sn superconducting coil. In this paper, the development of Nb3Sn coils made by the R&W method with the pre-bending effect is described, and the efficiency of the cable assembled by the reacted Nb3Sn strands is discussed.

Original languageEnglish
Title of host publicationADVANCES IN CRYOGENIC ENGINEERING
Subtitle of host publicationTransactions of the International Cryogenic Materials Conference, ICMC, Volume 52B
Pages536-543
Number of pages8
DOIs
Publication statusPublished - 2006 Mar 31
EventADVANCES IN CRYOGENIC ENGINEERING: Transactions of the International Cryogenic Materials Conference, ICMC - Keystone, CO, United States
Duration: 2005 Aug 292005 Sep 2

Publication series

NameAIP Conference Proceedings
Volume824 II
ISSN (Print)0094-243X
ISSN (Electronic)1551-7616

Other

OtherADVANCES IN CRYOGENIC ENGINEERING: Transactions of the International Cryogenic Materials Conference, ICMC
CountryUnited States
CityKeystone, CO
Period05/8/2905/9/2

Keywords

  • Bending strain
  • Coil
  • Critical current
  • NbSn
  • React and wind

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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