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Stability of YBCO coated conductor according to Cu stabilizer thickness for cryogenic applications.

Number: pap. n. 016

Author(s) : YOONHAN B., BEOMYONG E., HAEJONG K., et al.

Summary

The studies on the conduction-cooled superconducting magnets are actively underway with rapid advancement in refrigeration technology recently. YBCO coated conductor (CC) is one of the promising conductor for conduction-cooled superconducting magnets because of increasing the operation temperature of magnets and being able to have cost competiveness with conventional copper conductor in the future. However, it is known that quench propagation velocity in high-temperature superconductor (HTS) is two or three orders of magnitude slower than that in low-temperature superconductor (LTS) because of its large heat capacity and the high operating temperature. The hot spot will emerge in local region if the critical current is non-uniform along the length of HTS tape and eventually, it causes permanent destroy for the whole HTS tape. Based on the protection of YBCO CC, it is necessary to determine a suitable copper stabilizer thickness for YBCO CC so that the temperature of hot spot in local area does not exceed the permissible temperature. In this study, the authors analyzed the thermal properties of YBCO CC in the adiabatic condition. Also, they measured minimum quench energy (MQE) of the three kinds of YBCO CC samples with different copper stabilizer thickness fabricated by Superpower Incorporated.

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Pages: 328-332

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Details

  • Original title: Stability of YBCO coated conductor according to Cu stabilizer thickness for cryogenic applications.
  • Record ID : 30006949
  • Languages: English
  • Source: Cryogenics 2012. Proceedings of the 12th IIR International Conference: Dresden, Germany, September 11-14, 2012.
  • Publication date: 2012/09/11

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