Progress in Superconductivity and Cryogenics (한국초전도ㆍ저온공학회논문지)

The Korean Society of Superconductivity and Cryogenics (한국초전도저온학회)
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Fabrication of 6-superconducting layered HTS wire for high engineering critical current density

  • Kim, Gwantae (Superconductivity Research Center, Korea Electrotechnology Research Institute) ;
  • Ha, Hongsoo (Superconductivity Research Center, Korea Electrotechnology Research Institute) ;
  • Kim, Hosup (Superconductivity Research Center, Korea Electrotechnology Research Institute) ;
  • Oh, Sangsoo (Superconductivity Research Center, Korea Electrotechnology Research Institute) ;
  • Lee, Jaehun (SuNAM Co. Ltd.) ;
  • Moon, Seunghyun (SuNAM Co. Ltd.)
  • Received : 2021.11.22
  • Accepted : 2021.12.01
  • Published : 2021.12.31
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Abstract

Recently, cable conductors composed of numerous coated conductors have been developed to transport huge current for large-scale applications, for example accelerators and fusion reactors. Various cable conductors such as CORC (Conductor on round core), Roebel Cable, and TSTC (Twisted stacked tape cable) have been designed and tested to apply for large-scale applications. But, these cable conductors cannot improve the engineering critical current density (Je) because they are made by simple stacking of coated conductors. In this study, multi-HTS (High temperature superconductor) layers on one substrate (MHOS) wire was fabricated to increase the engineering critical current density by using the exfoliation of superconducting layer from substrate and silver diffusion bonding method. By the repetition of these processes, the 10 m long 6-layer MHOS conductor was successfully fabricated without any intermediate layers like buffer or solder. 6-layer MHOS conductor exhibited a high critical current of 2,460A/12mm-w. and high engineering critical current density of 1,367A/mm2 at liquid nitrogen temperature.

Keywords

Acknowledgement

This research was supported by Korea Electro technology Research Institute (KERI) primary research program through the National Research Council of Science & Technology (NST) funded by the Ministry of Science and ICT (MSIT) (No. 21A01019).

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