Angle-Dependent U(I) Measurements of HTS Coated Conductors

Leys, P.; Klaeser, M.; Schleissinger, F.; Schneider, Theo

doi:10.1109/tasc.2012.2232700

Cited by 24 publications

(17 citation statements)

References 11 publications

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“…In this configuration, the maximum transverse component of the field is at the edges of the windings, as expected [12]. It reaches a maximum of 3.5 T for a field modulus of about 20 T. Hence, in this area, the magnetic field is no longer parallel to the surface of the HTS tape.…”

Section: Magnetic Field Distribution and Consequencessupporting

confidence: 76%

“…It is not uncommon that the amount of current carried under transverse field is 1.5-4 times lower than under the same field amplitude but parallel to the tape. This anisotropy has to be taken into consideration when dimensioning the magnet [12]. Eventually, HTS tapes can be subject to severe mechanical stress thanks to their substrate, made of Hastelloy , a high performance nickel tungsten alloy.…”

Section: Rebco Tapesmentioning

confidence: 99%

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REBCO tape performance under high magnetic field

Benkel

Miyoshi

Chaud

et al. 2017

Eur. Phys. J. Appl. Phys.

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Abstract. New improvements in high temperature superconductors (HTS) make them a promising candidate for building the next generation of high field magnets. As the conductors became recently available in long length, new projects such as NOUGAT (new magnet generation to generate Tesla at low cost) were started. This project aims at designing and building an HTS magnet prototype generating 10 T inside a 20 T resistive magnet. In this configuration, severe mechanical stress is applied on the insert and its extremities are subject to a high transverse component of the field. Because the conductor has anisotropic properties, it has to be studied carefully under similar conditions as the final prototype. First, this paper presents both the NOUGAT project and its context. Then, it shows the experimental results on short HTS tapes studied under high magnetic field up to 23 T with varying orientation. These results allow validating the current margin of the prototype. Finally, a first wound prototype is presented with experimental results up to 200 A under 16 T.

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Section: Magnetic Field Distribution and Consequencessupporting

confidence: 76%

Section: Rebco Tapesmentioning

confidence: 99%

REBCO tape performance under high magnetic field

Benkel

Miyoshi

Chaud

et al. 2017

Eur. Phys. J. Appl. Phys.

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“…Because of the intrinsic anisotropy of REBCO tapes, their critical parameters, in particular I c and n, are extremely sensitive to the orientation of the external magnetic field. At 4.2 K, the angle of the applied field is the main factor affecting the performance of the HTS coil, which has to be taken into consideration for high field applications [43].…”

Section: The Coil Performance At 42 K In External Fieldsmentioning

confidence: 99%

Performance study of a new epoxy resin IR-3 in HTS-based high-field magnet application

Yao¹,

Zhang²,

Wang³

et al. 2022

Mater. Res. Express

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REBCO (Rare-earth-based barium copper oxide) conductors are appropriate materials for high-field magnet applications. Vacuum impregnation using epoxy resin is a technique widely used for stable operation of superconducting coils. However, epoxy-impregnated REBCO coils often experience critical current degradation problems. Finding a suitable impregnating material for REBCO coils is important for their application in high-field superconducting magnets. A new toughness epoxy, IR-3, was developed recently. An in-depth understanding of IR-3 on the performance of REBCO coils is critically necessary for its application. Thus, this paper explores the effects of IR-3 impregnation on the performance of REBCO coils at 77 K and 4.2 K. The test results are compared to similar coils impregnated with CTD-101 K and MY750. Meanwhile, the radial stresses at 77 K in self-field and 4.2 K under 10 T were simulated. All epoxy impregnated REBCO coils showed no decay in critical current after thermal cycles at 77 K. When charged at 4.2 K in external fields of 5 T and 10 T, the IR-3 impregnated REBCO coils avoided performance degradation problems and had superior electrical stabilities. Combing the excellent performance at low temperatures, IR-3 is a promising candidate material for impregnating high-field REBCO coils.

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“…Parallel to the continuous development of 2G-coated conductor HTS by an increasing number of manufacturers, (nearly) all commercially available tapes were (and are) investigated in our laboratory in high fields and He bath temperature with regard to the angle dependence of their critical current, I C (B, Φ), and n-value, n(B, Φ). Details of the measurements and a part of the results can be found in [16] and [17]. Due to its-even by today's standards-extraordinary high-field low-temperature performance (see Fig.…”

Section: A Fujikura Fysc-sc05 2g Htsmentioning

confidence: 99%

Achievement of 26.5 T at 1.8 K and 24.0 T at 4.4 K in a Free Bore of 68-mm Diameter: Successful Commissioning of the HOMER II LTS/HTS High-Field Facility Upgrade

Hornung

Decker

Eisele

et al. 2021

IEEE Trans. Appl. Supercond.

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As an upgrade for higher fields, a REBCO hightemperature superconductor (HTS) insert coil with a remarkable cold bore of 68-mm diameter has been constructed with the goal to be routinely operated to attain total fields of 25 T and beyond in HOMER II. HOMER II is the most advanced superconducting high-field facility of the Institute for Technical Physics at the Karlsruhe Institute of Technology. With its basic magnet configuration, consisting of NbTi and (NbX) 3 Sn low-temperature superconductor solenoid sections, HOMER II can generate a magnetic field of 20 T in a large bore of 185-mm diameter at a Helium bath temperature of 1.8 K. The REBCO HTS insert coil was manufactured using the rarely implemented concept of layer winding technology and consists of five nested solenoids. In this article, we report on the design of the insert, its construction, and commissioning as well as related aspects. In the initial operation period, magnetic fields of up to 26.5 T were obtained at 1.8 K and 24.0 T at 4.4 K, respectively, without training steps and quenching or other problems.

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Angle-Dependent U(I) Measurements of HTS Coated Conductors

Cited by 24 publications

References 11 publications

REBCO tape performance under high magnetic field

REBCO tape performance under high magnetic field

Performance study of a new epoxy resin IR-3 in HTS-based high-field magnet application

Achievement of 26.5 T at 1.8 K and 24.0 T at 4.4 K in a Free Bore of 68-mm Diameter: Successful Commissioning of the HOMER II LTS/HTS High-Field Facility Upgrade

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