Coupling-current loss in a multifilamentary superconducting wire with a normal-metal core

Sumiyoshi, F.; Hori, H.; Irie, F.

doi:10.1016/0011-2275(82)90139-4

Cited by 5 publications

(1 citation statement)

References 10 publications

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“…Above f max the loss curve is expected to decrease continuously, but in some cases a second maximum appears at high frequencies. It was shown that such a behaviour of Q c ( f ) can result from the presence of two time constants in a sample [1]; a detailed experimental and theoretical description was given in [2].…”

Section: Introductionmentioning

confidence: 99%

Correlation of coupling losses and time constants in superconducting Bi-2223 tapes

Schmidt¹,

Goldacker²,

Will³

et al. 2004

Supercond. Sci. Technol.

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Ac-loss and coupling current time constant measurements were performed with a large variety of Bi-2223 tape conductors at 4.2 and at 77 K. Single tapes in a perpendicular field as well as stacks of tapes in perpendicular and parallel fields were investigated. The frequency dependence of the coupling loss curve has a maximum which is set in correlation to the separately measured time constant. The theoretical treatment of the time constant and loss measurements using a slab model shows a very good agreement between the position of loss maxima and measured time constants. Eddy currents in the silver matrix, which are described by a second smaller time constant, contribute substantially to the losses in the higher frequency range and may lead to the appearance of a second maximum in the loss curve.

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Section: Introductionmentioning

confidence: 99%