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Bending Behavior of HTS Stacked Tapes in a Cable-in-Conduit Conductor With Twisted Al-Slotted Core
In this paper, we report on the experimental study of the bending behavior, at 77 K, of a cable-in-conduit conductor composed of a stack of REBa$_2$Cu$_3$O$_{7-\mathrm{x}}$ (REBCO) tapes inserted into a helical duct formed in the extruded aluminum cylindrical core. The investigation was carried out...
Autores principales: | , , , , , , , , , |
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Lenguaje: | eng |
Publicado: |
2019
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Materias: | |
Acceso en línea: | https://dx.doi.org/10.1109/tasc.2019.2899248 http://cds.cern.ch/record/2804331 |
_version_ | 1780972850889359360 |
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author | Celentano, Giuseppe Vannozzi, Angelo De Marzi, Gianluca Marchetti, Marcello Augieri, Andrea Di Zenobio, Aldo Fabbri, Fabio Muzzi, Luigi Rufoloni, Alessandro della Corte, Antonio |
author_facet | Celentano, Giuseppe Vannozzi, Angelo De Marzi, Gianluca Marchetti, Marcello Augieri, Andrea Di Zenobio, Aldo Fabbri, Fabio Muzzi, Luigi Rufoloni, Alessandro della Corte, Antonio |
author_sort | Celentano, Giuseppe |
collection | CERN |
description | In this paper, we report on the experimental study of
the bending behavior, at 77 K, of a cable-in-conduit conductor composed of a stack of REBa$_2$Cu$_3$O$_{7-\mathrm{x}}$ (REBCO) tapes inserted into a
helical duct formed in the extruded aluminum cylindrical core. The
investigation was carried out by powering each single tape individually. By the analysis of the single tape $I_c$ dependence as a function
of the bending radius, $R_b$ , the effect of bending strain as a function
of tape position inside the stack was investigated for each tape. The
results evidence the good bending strain tolerance of all the tapes,
showing the onset of degradation at $R_b \approx 0.25$m, ascribed to the
slippage occurring among tapes within the stack. Interestingly, the
decrease in the intertape contact resistance between neighboring
tapes with respect to the straight cable condition reveals that the
bending stress results in a beneficial additional transverse load on
the stacks, which leads to a more uniform compaction of tape stack.
The experimental $I_c$ behavior with $R_b$ has been explained considering that the current transfer mechanism among tapes might
mitigate the degradation of the tape $I_c$ due to the bending strain.
The identification of the mechanisms acting on individual tapes
under cable bending conditions is a relevant achievement in perspective of the interpretation of the electromechanical behavior of
the conductor with all tapes powered in parallel. |
id | cern-2804331 |
institution | Organización Europea para la Investigación Nuclear |
language | eng |
publishDate | 2019 |
record_format | invenio |
spelling | cern-28043312022-03-19T22:59:54Zdoi:10.1109/tasc.2019.2899248http://cds.cern.ch/record/2804331engCelentano, GiuseppeVannozzi, AngeloDe Marzi, GianlucaMarchetti, MarcelloAugieri, AndreaDi Zenobio, AldoFabbri, FabioMuzzi, LuigiRufoloni, Alessandrodella Corte, AntonioBending Behavior of HTS Stacked Tapes in a Cable-in-Conduit Conductor With Twisted Al-Slotted CoreAccelerators and Storage RingsIn this paper, we report on the experimental study of the bending behavior, at 77 K, of a cable-in-conduit conductor composed of a stack of REBa$_2$Cu$_3$O$_{7-\mathrm{x}}$ (REBCO) tapes inserted into a helical duct formed in the extruded aluminum cylindrical core. The investigation was carried out by powering each single tape individually. By the analysis of the single tape $I_c$ dependence as a function of the bending radius, $R_b$ , the effect of bending strain as a function of tape position inside the stack was investigated for each tape. The results evidence the good bending strain tolerance of all the tapes, showing the onset of degradation at $R_b \approx 0.25$m, ascribed to the slippage occurring among tapes within the stack. Interestingly, the decrease in the intertape contact resistance between neighboring tapes with respect to the straight cable condition reveals that the bending stress results in a beneficial additional transverse load on the stacks, which leads to a more uniform compaction of tape stack. The experimental $I_c$ behavior with $R_b$ has been explained considering that the current transfer mechanism among tapes might mitigate the degradation of the tape $I_c$ due to the bending strain. The identification of the mechanisms acting on individual tapes under cable bending conditions is a relevant achievement in perspective of the interpretation of the electromechanical behavior of the conductor with all tapes powered in parallel.oai:cds.cern.ch:28043312019 |
spellingShingle | Accelerators and Storage Rings Celentano, Giuseppe Vannozzi, Angelo De Marzi, Gianluca Marchetti, Marcello Augieri, Andrea Di Zenobio, Aldo Fabbri, Fabio Muzzi, Luigi Rufoloni, Alessandro della Corte, Antonio Bending Behavior of HTS Stacked Tapes in a Cable-in-Conduit Conductor With Twisted Al-Slotted Core |
title | Bending Behavior of HTS Stacked Tapes in a Cable-in-Conduit Conductor With Twisted Al-Slotted Core |
title_full | Bending Behavior of HTS Stacked Tapes in a Cable-in-Conduit Conductor With Twisted Al-Slotted Core |
title_fullStr | Bending Behavior of HTS Stacked Tapes in a Cable-in-Conduit Conductor With Twisted Al-Slotted Core |
title_full_unstemmed | Bending Behavior of HTS Stacked Tapes in a Cable-in-Conduit Conductor With Twisted Al-Slotted Core |
title_short | Bending Behavior of HTS Stacked Tapes in a Cable-in-Conduit Conductor With Twisted Al-Slotted Core |
title_sort | bending behavior of hts stacked tapes in a cable-in-conduit conductor with twisted al-slotted core |
topic | Accelerators and Storage Rings |
url | https://dx.doi.org/10.1109/tasc.2019.2899248 http://cds.cern.ch/record/2804331 |
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