Electrical characterization of REBCO Roebel cables

Fleiter, J.; Ballarino, A.; Bottura, L.; Tixador, Pascal

doi:10.1088/0953-2048/26/6/065014

Cited by 47 publications

(47 citation statements)

References 14 publications

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“…Taking benefit of the increase in J E in parallel field (depending on tape composition and doping, up to an order of magnitude), this simple calculation shows that this configuration is indeed capable of achieving the 10 kA range of current. This prediction is substantiated by tests performed on similar tape and cable geometries quoted earlier [54].…”

Section: G Cable Designsupporting

confidence: 71%

“…The considerations above have guided the choice towards a Roebel cable, satisfying at least in part the above criteria, and in particular a high C, full transposition, and demonstrated ability to carry currents in the range of 10 kA [54]. The Roebel cable has delicate locations where the meandered tapes cross the cable width, resulting in stress concentration.…”

Section: F Baseline Cable Selectionmentioning

confidence: 99%

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Advances in the Development of a 10-kA Class REBCO Cable for the EuCARD2 Demonstrator Magnet

Badel¹,

Ballarino²,

Barth³

et al. 2016

IEEE Trans. Appl. Supercond.

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Abstract-The objective of the EuCARD2 WP10 (Future Magnets) research activity is to demonstrate HTS magnet technology for accelerator applications, by building a short demonstrator dipole with an aperture of 40 mm, operating field of 5 T, and understood field quality. One of the magnet requirements is of small inductance, for use in long magnet strings, hence the superconducting cable must have large current carrying capacity, in the range of 10 kA at the operating conditions of 4.2 K and 5 T. An initial down-selection of the cable material and geometry resulted in the choice of REBCO tapes assembled in a Roebel cable as baseline layout. In this paper we describe the requirements derived from magnet design, the selection process that led to the choice of material and geometry, the reference design of the cable, and its options. Activities have started to address fundamental issues, such as tape performance and tape processing through the cable construction, and key performance parameters such as cable critical current under stress or magnetization. Here we report the main highlights from this work.

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Section: G Cable Designsupporting

confidence: 71%

Section: F Baseline Cable Selectionmentioning

confidence: 99%

Advances in the Development of a 10-kA Class REBCO Cable for the EuCARD2 Demonstrator Magnet

Badel¹,

Ballarino²,

Barth³

et al. 2016

IEEE Trans. Appl. Supercond.

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“…Of the three cables, one was successfully wound with a current degradation as low as 12%; in the other two samples, the current was This is an author-created, un-copyedited version of an article accepted for publication in Superconductor Science and Technology. The publisher is not responsible for any errors or omissions in this version of the manuscript or any version [44]. Several parameters can multiply the current capacity, for example: extended transposition, wider tapes, improved CC performance (being already shown in short samples by several producers) and finally the multi-stack strands.…”

Section: Cables With Very High Currentsmentioning

confidence: 99%

“…Field dependence of the critical current for different cable samples at 4.2 K. Cable A is from GCS, cables B and C from KIT. Source:[44]. This is an author-created, un-copyedited version of an article accepted for publication in Superconductor Science and Technology.…”

mentioning

confidence: 99%

Roebel cables from REBCO coated conductors: a one-century-old concept for the superconductivity of the future

Goldacker

Grilli

Pardo

et al. 2014

Supercond. Sci. Technol.

253

139

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Energy applications employing high-temperature superconductors (HTS), such as motors/generators, transformers, transmission lines and fault current limiters, are usually operated in the alternate current (AC) regime. In order to be efficient, the HTS devices need to have a sufficiently low value of AC loss, in addition to the necessary current-carrying capacity. Most applications are operated with currents beyond the current capacity of single conductors and consequently require cabled conductor solutions with much higher current carrying capacity, from a few kA to up to 20-30 kA for large hydro-generators.A century ago, in 1914, Ludwig Roebel invented a low-loss cable design for copper cables, which was successively named after him. The main idea behind Roebel cables is to separate the current in different strands and to provide a full transposition of the strands along the cable direction. Nowadays, these cables are commonly used in the stator of large generators. Based on the same design concept of their conventional material counterparts, HTS Roebel cables from REBCO coated conductors were first manufactured at the Karlsruhe Institute of Technology (KIT) and have been successively developed in a number of varieties that provide all the required technical features such as fully transposed strands, high transport currents and low AC losses, yet retaining enough flexibility for a specific cable design. In the past few years a large number of scientific papers have been published on the concept, manufacturing and characterization of such cables. Times are therefore mature for a review of those results. The goal is to provide an overview and a succinct and easy-to-consult guide for users, developers, and manufacturers of this kind of HTS cables.

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“…Roebel-type cables are considered [133][134][135], but are still in their relative infancy. Recent tests at CERN on two Roebel cables made by Karlsruhe Institute of Technology (KIT) and General Cable Superconductors (GCS), assembled from 10 and 15 12-mm-wide tapes respectively, showed critical current at 4.2 K in excess of 10 kA in a parallel 10 T background field, and approximately 4 kA in a 10 T perpendicular field [136]. The critical current of both cables is in agreement with the value expected from single tapes, once the contributions of background and self-field are properly taken into account.…”

Section: Superconducting Materials and Conductors: Fabrication And LImentioning

confidence: 99%

Superconducting Materials and Conductors: Fabrication and Limiting Parameters

Bottura

Godeke

2012

Rev. Accl. Sci. Tech.

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Superconductivity is the technology that enabled the construction of the most recent generation of high-energy particle accelerators, the largest scientific instruments ever built. In this review we trace the evolution of superconducting materials for particle accelerator magnets, from the first steps in the late 1960s, through the rise and glory of Nb-Ti in the 1970s, till the 2010s, and the promises of Nb 3 Sn for the 2020s. We conclude with a perspective on the opportunities for high-temperature superconductors (HTSs). Many such reviews have been written in the past, as witnessed by the long list of references provided. In this review we put particular emphasis on the practical aspects of wire and tape manufacturing, cabling, engineering performance, and potential for use in accelerator magnets, while leaving in the background matters such as the physics of superconductivity and fundamental material issues.

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Electrical characterization of REBCO Roebel cables

Cited by 47 publications

References 14 publications

Advances in the Development of a 10-kA Class REBCO Cable for the EuCARD2 Demonstrator Magnet

Advances in the Development of a 10-kA Class REBCO Cable for the EuCARD2 Demonstrator Magnet

Roebel cables from REBCO coated conductors: a one-century-old concept for the superconductivity of the future

Superconducting Materials and Conductors: Fabrication and Limiting Parameters

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