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Levitation characteristics of HTS tape stacks

  • Pokrovskiy, S.V. (National Research Nuclear University MEPhI (Moscow Engineering Physics Institute)) ;
  • Ermolaev, Y.S. (National Research Nuclear University MEPhI (Moscow Engineering Physics Institute)) ;
  • Rudnev, I.A. (National Research Nuclear University MEPhI (Moscow Engineering Physics Institute))
  • Received : 2015.01.20
  • Accepted : 2015.03.17
  • Published : 2015.03.31

Abstract

Due to the considerable development of the technology of second generation high-temperature superconductors and a significant improvement in their mechanical and transport properties in the last few years it is possible to use HTS tapes in the magnetic levitation systems. The advantages of tapes on a metal substrate as compared with bulk YBCO material primarily in the strength, and the possibility of optimizing the convenience of manufacturing elements of levitation systems. In the present report presents the results of the magnetic levitation force measurements between the stack of HTS tapes containing $n=2{\div}200$ of tapes $12mm{\times}12mm$ and NdFeB permanent magnet in the FC and ZFC regimes. It was found a non- linear dependence of the levitation force from the height of the array of stack in both modes: linear growth at small thickness gives way to flattening and constant at large number of tapes in the stack. Established that the levitation force of stacks comparable to that of bulk samples. The numerical calculations using finite element method showed that without the screening of the applied field the levitation force of the bulk superconductor and the layered superconductor stack with a critical current of tapes increased by the filling factor is exactly the same, and taking into account the screening force slightly different.

Keywords

References

  1. A Patel, S C Hopkins and B A Glowacki, "Trapped fields up to 2 T in a 12 mm square stack of commercial superconducting tape using pulsed field magnetization, " Supercond. Sci. Technol., vol. 26, 032001, pp. 1-7, 2013.
  2. Yu. S. Ermolaev, I. A. Rudnev, "Calculating levitation forces in the magnet-high-temperature superconductor systems," Technical Physics Letters, vol. 31, no. 12, pp. 1065-1067, 2005. https://doi.org/10.1134/1.2150900
  3. C. P. Bean, "Magnetization of High-Field Superconductors," Rev. Mod. Phys., vol. 36, no. 1, pp. 31-39, 1964. https://doi.org/10.1103/RevModPhys.36.31
  4. M. J. Qin, G. Li, H. K. Liu, and S. X. Dou, E. H. Brandt, "Calculation of the hysteretic force between a superconductor and a magnet," Phys. Rev. B, vol. 66, 024516, pp. 1-11, 2002.
  5. S Pokrovskiy, N Mineev, A Sotnikova, Y Ermolaev, I Rudnev, "The study of relaxation characteristics of stack of HTS tapes for use in levitation systems and trapped flux magnets," Journal of Physics: Conference Series, vol. 507, 022025, pp. 1-4, 2014.

Cited by

  1. Magnetization and levitation characteristics of HTS tapes stacks in crossed magnetic fields 2016, https://doi.org/10.1109/TASC.2016.2533573
  2. Magnetometry Diagnostics of Defects in High-Temperature Superconducting Tapes in a Gradient Magnetic Field vol.64, pp.4, 2015, https://doi.org/10.1134/s1063784219040170