Long-Length YBCO Coated Stainless Steel Tapes With High Critical Currents

Usoskin, A.; Rutt, A.; Knoke, J.; Krauth, H.; Arndt, Thomas

doi:10.1109/tasc.2005.847669

Cited by 26 publications

(19 citation statements)

References 6 publications

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“…If the latter is randomly rough, rather than ideally smooth as our theoretical model implies, the Bean-Livingston barrier against entry of magnetic flux proves insignificant, and magnetic flux penetrates when the lower critical field H c1 is reached at the surface of the strip, whatever the microscopic details of its structure may be. In the case of an yttrium-barium cuprate coated tape [37,38], the lower critical field amounts to H c1 = 3.3×10 4 A m −1 at the liquid nitrogen temperature of 77 K [39]. Since the sheet current J is related to the tangential component of the magnetic field H (0) t on the surface of the strip by J = 2H (0) t , the value of the characteristic sheet current for entry of magnetic flux J e = 6.6 × 10 4 A m −1 is obtained.…”

Section: Discussionmentioning

confidence: 99%

Finite-element simulations of overcritical states of a magnetically shielded superconductor strip

Genenko

Rauh²,

Krüger

et al. 2009

Supercond. Sci. Technol.

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Numerical simulations of the flux-free Meissner state and the partly flux-filled critical state of a thin, current-carrying type-II superconductor strip shielded by a soft-magnetic environment of restricted geometry are performed, calling upon the ANSYS finite-element software program and exploiting magnetostatic-electrostatic analogues. The distribution of the static magnetic field around the superconductor strip, the distribution of the sheet current in the strip, and the maximum total transport current carried by the strip are established for two practically relevant magnet configurations and a range of magnetic permeabilities. The predictions of the simulations are qualitatively in line with previous analytical and numerical results concerning idealized shields; they demonstrate the existence of non-dissipative overcritical states associated with substantial redistributions of the sheet current towards the centre of the strip and significant enhancements of the total loss-free current that can be carried by the strip for both the introduced concave and, respectively, convex magnetic cavity, however with a bias in favour of the latter type of environment. The shielding effect is highly sensitive to the distance between the edges of the strip and the magnets and, unlike the case for magnets of semi-infinite extent, exhibits slow saturation with increasing values of the magnetic permeability. Hysteretic ac losses suffered by the magnetically shielded strip in the periodically changing, partly flux-filled critical state drastically wane when the magnetic permeability augments.

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Section: Discussionmentioning

confidence: 99%

Finite-element simulations of overcritical states of a magnetically shielded superconductor strip

Genenko

Rauh²,

Krüger

et al. 2009

Supercond. Sci. Technol.

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“…The core was constructed of 14 YBCO tapes of 75 A critical current [1]. Tapes were placed in single layer on the surface of the epoxy-fiberglass mandrel of diameter 2 cm and length of 50 cm, with the lay angle of 15…”

Section: Methodsmentioning

confidence: 99%

DC Characterization of the Coaxial Superconducting Cable

et al. 2008

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Coaxial cable model with superconducting core and superconducting shield conductor was constructed and tested in DC regime. While the core was already examined in our previous works, in this contribution the detailed study of the superconducting shield conductor in DC conditions is presented. It consists of 16 ReBCO coated tapes with critical current 35 A each connected in parallel. Using shunts with known values placed in series the currents in individual tapes were possible to measure. Distribution of the total cable current into the individual tapes was monitored and its influence on critical current of the cable is discussed.

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“…In Europe, 40 m long CCs (SS/IBAD–YSZ/CeO 2 /PLD–YBCO) are routinely manufactured at present with I c 's of 235 A/cm‐width as well as 100 m tapes with an I c of 253 A/cm‐width (see Fig. 3), 23,24 whereas in Japan 245 A/cm‐width were reached for similar cross‐sectional CC architectures in 212 m long tapes 25 . For technological use, the cost of manufacturing CCs is a major issue.…”

Section: Ybacuo and Rebacuo The Workhorsesmentioning

confidence: 99%

YBaCuO and REBaCuO HTS for Applications

Freyhardt

2007

Int J Applied Ceramic Tech

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The discovery of electrical conductors that carry loss‐less currents at liquid nitrogen temperatures and above, high‐temperature superconductors (HTS), inspired the imaginations of scientists and engineers in an unprecedented way. It culminated in a broad search for an understanding of their basic phenomena and properties, but also for new classes of the HTS. The availability of these materials created novel ideas of their use for effective and economical generation, transport, and use of electric energy. YBaCuO and related REBaCuO HTS compounds still belong to the most attractive workhorses. This contribution intends to illustrate the efforts to manufacture from these HTS bulk monoliths, wires, tapes, or conductors, which would be needed for novel components and devices for electrical and power engineering, devices that offer not only an effective use of energy but also broad environmental benefits and, furthermore, help to safe resources. The research and developments discussed are mainly focused on efforts in Europe.

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Long-Length YBCO Coated Stainless Steel Tapes With High Critical Currents

Cited by 26 publications

References 6 publications

Finite-element simulations of overcritical states of a magnetically shielded superconductor strip

Finite-element simulations of overcritical states of a magnetically shielded superconductor strip

DC Characterization of the Coaxial Superconducting Cable

YBaCuO and REBaCuO HTS for Applications

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