Electro-mechanical properties of REBCO coated conductors from various industrial manufacturers at 77 K, self-field and 4.2 K, 19 T

Barth, C.; Mondonico, Giorgio; Senatore, Carmine

doi:10.1088/0953-2048/28/4/045011

Cited by 194 publications

(110 citation statements)

References 40 publications

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“…Currently, the E-type geometry is the most balanced and favorable in electromechanical terms. 5) Manufacturer of REBCO tapes: B versus G obtained difference between B (SuperPower) and G (SuperOx) samples is in agreement with a recently published comparison of mechanical properties of various REBCO coated conductors [12]. While the R c of SuperOx strand is higher, it is still applicable for construction of relevant high-current cable based on such strands.…”

Section: B Bendingsupporting

confidence: 87%

“…• sets the operational limits: 25 MPa for A and 20 MPa for G. Due to a slightly weaker mechanical performance of the tapes made by SuperOx compared with those by SuperPower [12], the B sample could have higher operational limit than the G one (see Table II). In contrast with the A and G samples, measured curves for the E sample are very similar at 0…”

Section: Transverse Pressurementioning

confidence: 99%

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Design Optimization of Round Strands Made by Twisted Stacks of HTS Tapes

Bykovsky

Uglietti

Wesche

et al. 2016

IEEE Trans. Appl. Supercond.

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Abstract-A twisted stack of high-temperature superconducting (HTS) tapes soldered into copper profiles was used as a strand in the fabrication of the 60-kA/12-T HTS cable prototype at the Center for Research in Plasma Physics (CRPP). Considering the strand in general as a modular element for the high-current cables, design parameters of the strand need to be optimized in order to best fulfill requirements of appropriate application field. During the development program of the HTS fusion cable at CRPP, influence of the design parameters on the strand's performance was obtained as input data for the optimization process. In this paper, we summarize the results of the twisting, bending, and transverse pressure tests on strands of various tapes and profile's geometries. Finite-element model for the transverse pressure test was developed, validated with the test results, and used for the design proposals. Effect of the stack aspect ratio, tape properties, and anisotropy, as well as selection of HTS material for the strand, will be discussed.Index Terms-Finite-element method (FEM) analysis, hightemperature superconducting (HTS) tapes, mechanical load, round strand.

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Section: B Bendingsupporting

confidence: 87%

Section: Transverse Pressurementioning

confidence: 99%

Design Optimization of Round Strands Made by Twisted Stacks of HTS Tapes

Bykovsky

Uglietti

Wesche

et al. 2016

IEEE Trans. Appl. Supercond.

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“…This bare conductor is surrounded with 20 mm of polyimide (insulator) on each side for an average density of 6700 kg/ m 3 . Most of the commercially available tapes are able to sustain a strain of 0.5% until they start to lose their superconducting properties [21], which is corresponding in our case to a 500 MPa average stress on the conductor. In both cases, the winding is respecting a mechanical criterion which is to self-support its tensile stress (hoop stress), which is the strongest mechanical stress to which the winding is submitted.…”

Section: Elements Of Designs Comparisonmentioning

confidence: 94%

Superconducting magnetic energy storage and superconducting self-supplied electromagnetic launcher

Cicéron

Badel

Tixador

2017

Eur. Phys. J. Appl. Phys.

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Abstract. Superconductors can be used to build energy storage systems called Superconducting Magnetic Energy Storage (SMES), which are promising as inductive pulse power source and suitable for powering electromagnetic launchers. The second generation of high critical temperature superconductors is called coated conductors or REBCO (Rare Earth Barium Copper Oxide) tapes. Their current carrying capability in high magnetic field and their thermal stability are expanding the SMES application field. The BOSSE (Bobine Supraconductrice pour le Stockage d'Energie) project aims to develop and to master the use of these superconducting tapes through two prototypes. The first one is a SMES with high energy density. Thanks to the performances of REBCO tapes, the volume energy and specific energy of existing SMES systems can be surpassed. A study has been undertaken to make the best use of the REBCO tapes and to determine the most adapted topology in order to reach our objective, which is to beat the world record of mass energy density for a superconducting coil. This objective is conflicting with the classical strategies of superconducting coil protection. A different protection approach is proposed. The second prototype of the BOSSE project is a small-scale demonstrator of a Superconducting Self-Supplied Electromagnetic Launcher (S3EL), in which a SMES is integrated around the launcher which benefits from the generated magnetic field to increase the thrust applied to the projectile. The S3EL principle and its design are presented. Motivation SMES principle [1]Superconductors have the property to lose their electrical resistivity when they are cooled under a critical temperature T C . Even if energy dissipation occurs in a superconductor submitted to variable electrical current or magnetic induction (B), there is no energy dissipation in a steady state. If a superconducting winding is supplied, then short-circuited current is not dissipated by Joule effect and magnetic energy is conserved almost indefinitely. This is the principle of inductive storage with superconductors, generally called SMES (Superconducting Magnetic Energy Storage).The stored energy E mag can be expressed as a function of inductance L and current I or as the integral over space of the product of magnetic field H by induction B, following (1):Once the SMES has been charged and short-circuited, the energy is available and can be used by opening the short circuit and connecting the SMES to a load. It can be connected to the load either directly as in the case of direct supply of an electromagnetic launcher, or through a voltage adaptation system if the discharge has to be controlled. SMES have low energy density compared to batteries, but high power densities. Furthermore, they can have high cycling yield (97%), with the cycling yield being defined as the recovered energy divided by the energy provided to the SMES, including the energy spent to cool the system, after one cycle. They are direct electricity storage devices such as capacitors. Nevertheless, ...

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“…On the other hand, thanks to the robust supports used for the material deposition (steel or other high strength structural alloys), and a good bonding of the layers achieved by the present production techniques, the mechanical properties of REBCO tapes both in longitudinal tension and transverse compression [27] are excellent. In fact, possibly due to the very large value of the critical field and temperature, the reversible sensitivity to strain is remarkably low until catastrophic crack development and irreversibility takes over [28]. The tape (50 µm substrate) can sustain uniform longitudinal stress up to 700 MPa, and transverse stress (applied on the face) above 100 MPa with little to no degradation [26].…”

Section: Hts Materials Focusmentioning

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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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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Electro-mechanical properties of REBCO coated conductors from various industrial manufacturers at 77 K, self-field and 4.2 K, 19 T

Cited by 194 publications

References 40 publications

Design Optimization of Round Strands Made by Twisted Stacks of HTS Tapes

Design Optimization of Round Strands Made by Twisted Stacks of HTS Tapes

Superconducting magnetic energy storage and superconducting self-supplied electromagnetic launcher

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

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