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Inter-filament Resistance at 77 K in Striated HTS Coated Conductors | R. Gyuraki
; A. Godfrin
; A. Jung
; A. Kario
; R. Nast
; E. Demencik
; F. Grilli
; W. Goldacker
; | Date: |
2 May 2016 | Abstract: | Striating HTS coated conductor (CC) tapes into narrow filaments offers the
possibility of reducing the tapes’ magnetization losses without unreasonably
decreasing their current-carrying capability. However, realizing well-separated
striations presents technological challenges, especially if the number of
filaments is large and/or if a thick layer of metallic stabilizer is present.
In these situations, the filaments can be easily coupled and their
effectiveness to reduce magnetization losses is strongly diminished or
eliminated. While the onset of coupling is well visible from magnetization loss
measurements, the actual path of the coupling current is unknown. In this
contribution we present a systematic study of the transverse resistance in HTS
CC samples in order to get a deeper understanding of those paths. The measured
samples differ in terms of manufacturer (SuperPower and SuperOx), and presence
and thickness of stabilizer material. In addition, oxidation is used as a means
to increase the resistance between the filaments in non-stabilized samples. The
results are interpreted with a chain network model. This work provides useful
insights on the factors determining the transverse resistance in striated HTS
CCs, thus indicating ways to improve the effectiveness of the striation process
for AC loss reduction. | Source: | arXiv, 1605.0401 | Services: | Forum | Review | PDF | Favorites |
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