Irradiation performance of rare earth and nanoparticle enhanced high temperature superconducting films based on YBCO

K. J. Leonard; F. A. List; T. Aytug; A. A. Gapud; J. W. Geringer

doi:10.1016/j.nme.2016.03.004

Irradiation performance of rare earth and nanoparticle enhanced high temperature superconducting films based on YBCO

K. J. Leonard, F. A. List, T. Aytug, A. A. Gapud, J. W. Geringer

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Abstract

The new series of commercially produced high temperature superconducting (HTS) tapes based on the YBa₂Cu₃O₇ (YBCO) structure have attracted renewed attention for their performance under applied magnetic fields without significant loss in supercurrent compared to the earlier generation of conductors. This adaptability is achieved through rare earth substitution and dopants resulting in the formation of nanoparticles and extended defects within the superconducting film matrix. The electrical performance of Zr-(Gd_x,Y₁−_x)Ba₂Cu₃O₇ and (Y₁−_x,Dy_x)Ba₂Cu₃O₇ coated conductor tapes were tested prior to and after neutron exposures between 6.54 × 10¹⁷ and 7.00 × 10¹⁸ n/cm² (E > 0.1 MeV). Results showed a decrease in superconducting current with neutron irradiation for the range of fluences tested, with losses in the Zr-(Gd_x,Y₁ ₋ _x)Ba₂Cu₃O₇ conductor being more rapid. Post-irradiation testing was limited to evaluation at 77 K and applied fields of up to 0.5 Tesla, and therefore testing at lower temperatures and higher applied fields may result in improved superconducting properties as shown in previous ion irradiation work. Under the conditions tested, the doped conductors showed a loss in critical current at fluences lower than that of undoped YBa₂Cu₃O₇ tapes reported on in literature.

Original language	English
Pages (from-to)	251-255
Number of pages	5
Journal	Nuclear Materials and Energy
Volume	9
DOIs	https://doi.org/10.1016/j.nme.2016.03.004
State	Published - Dec 1 2016

Funding

The authors would like to thank Frank Riley and Joel McDuffee who helped with capsule preparation and A. Marie Williams for her assistance in testing the irradiated samples. This research supported by the U.S. Department of Energy, Office of Science, Fusion Energy Sciences. This manuscript has been authored by UT-Battelle, LLC, under Contract No. DE-AC05-00OR22725 with the U.S. Department of Energy. The United States Government retains and the publisher, by accepting the article for publication, acknowledges that the United States Government retains a non-exclusive, paid-up, irrevocable, world-wide license to publish or reproduce the published form of this manuscript, or allow others to do so, for United States Government purposes. The Department of Energy will provide public access to these results of federally sponsored research in accordance with the DOE Public Access Plan (http://energy.gov/downloads/doe-public-access-plan).

Keywords

Electrical properties
Fusion
Neutron irradiation
Superconductors

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title = "Irradiation performance of rare earth and nanoparticle enhanced high temperature superconducting films based on YBCO",

abstract = "The new series of commercially produced high temperature superconducting (HTS) tapes based on the YBa2Cu3O7 (YBCO) structure have attracted renewed attention for their performance under applied magnetic fields without significant loss in supercurrent compared to the earlier generation of conductors. This adaptability is achieved through rare earth substitution and dopants resulting in the formation of nanoparticles and extended defects within the superconducting film matrix. The electrical performance of Zr-(Gdx,Y1−x)Ba2Cu3O7 and (Y1−x,Dyx)Ba2Cu3O7 coated conductor tapes were tested prior to and after neutron exposures between 6.54 × 1017 and 7.00 × 1018 n/cm2 (E > 0.1 MeV). Results showed a decrease in superconducting current with neutron irradiation for the range of fluences tested, with losses in the Zr-(Gdx,Y1 − x)Ba2Cu3O7 conductor being more rapid. Post-irradiation testing was limited to evaluation at 77 K and applied fields of up to 0.5 Tesla, and therefore testing at lower temperatures and higher applied fields may result in improved superconducting properties as shown in previous ion irradiation work. Under the conditions tested, the doped conductors showed a loss in critical current at fluences lower than that of undoped YBa2Cu3O7 tapes reported on in literature.",

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author = "Leonard, {K. J.} and List, {F. A.} and T. Aytug and Gapud, {A. A.} and Geringer, {J. W.}",

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AB - The new series of commercially produced high temperature superconducting (HTS) tapes based on the YBa2Cu3O7 (YBCO) structure have attracted renewed attention for their performance under applied magnetic fields without significant loss in supercurrent compared to the earlier generation of conductors. This adaptability is achieved through rare earth substitution and dopants resulting in the formation of nanoparticles and extended defects within the superconducting film matrix. The electrical performance of Zr-(Gdx,Y1−x)Ba2Cu3O7 and (Y1−x,Dyx)Ba2Cu3O7 coated conductor tapes were tested prior to and after neutron exposures between 6.54 × 1017 and 7.00 × 1018 n/cm2 (E > 0.1 MeV). Results showed a decrease in superconducting current with neutron irradiation for the range of fluences tested, with losses in the Zr-(Gdx,Y1 − x)Ba2Cu3O7 conductor being more rapid. Post-irradiation testing was limited to evaluation at 77 K and applied fields of up to 0.5 Tesla, and therefore testing at lower temperatures and higher applied fields may result in improved superconducting properties as shown in previous ion irradiation work. Under the conditions tested, the doped conductors showed a loss in critical current at fluences lower than that of undoped YBa2Cu3O7 tapes reported on in literature.

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Irradiation performance of rare earth and nanoparticle enhanced high temperature superconducting films based on YBCO

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