Thermo-electromagnetic stability of ultrafine multifilamentary superconducting wires for 50-60 Hertz use

Février, A.; Gueraud, A.; Tavergnier, J.P.; Laumond, Y.; Lacaze, A.

doi:10.1109/20.92579

Cited by 17 publications

(1 citation statement)

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“…Green conductors have been used for realizing several W&R test coils using a novel NiO-insulating technology (Herrmann et al 1999). For ac conductors where a controlled twisting and de-coupling of filaments is necessary (Février et al 1989), it has been shown previously (Herrmann et al 1997) that square shaped conductors are more easily twisted down to low twist pitch values. Although some approaches exist for the de-coupling of filaments in PIT conductors (Goldacker et al 1999), there exists today no entirely satisfying conductor concept for ac applications.…”

Section: Introductionmentioning

confidence: 99%

Long length PIT conductors realized by rectangular deformation route

Herrmann¹,

Böck²,

Bruzek³

et al. 2000

Supercond. Sci. Technol.

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Alcatel pursues the development of multifilamentary Bi-2212 and Bi-2223 tape conductors by the rectangular deformation route. It is shown by a simple cost evaluation that the Bi-2212 conductor represents today the optimum cost versus performance solution for applications in the intermediate temperature range 20-30 K. This interest in the Bi-2212 conductor is related: (1) to higher current density in the intermediate temperature range and (2) to the higher stability range at the formation temperature of the superconducting phase in the silver matrix which results in a simple single-step heat treatment. For the assessment of the conductors' homogeneity, studies of reacted conductors for R&W application have been realized. Kilometre lengths are available for the W&R process and hectometric lengths of fully reacted conductors with good tolerance to bending are available for the R&W process. The Bi-2223 conductor remains of course the best solution for power engineering applications at 77 K. The Alcatel conductor which is realized by the rectangular route shows a strongly reduced field dependency compared to conventional PIT conductors.

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Section: Introductionmentioning

confidence: 99%