Correlation of coupling losses and time constants in superconducting Bi-2223 tapes. Schmidt, C., Goldacker, W., Will, A., & Zabara, O. Superconductor Science and Technology, 17(5):S208-S212, 5, 2004.
abstract   bibtex   
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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 title = {Correlation of coupling losses and time constants in superconducting Bi-2223 tapes},
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 year = {2004},
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 pages = {S208-S212},
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 abstract = {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.},
 bibtype = {article},
 author = {Schmidt, C and Goldacker, W and Will, A and Zabara, O},
 journal = {Superconductor Science and Technology},
 number = {5}
}

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