AC losses and critical currents in Ag/(Tl,Pb,Bi)-1223 tape

Ciszek, M.; Glowacki, B.A.; Ashworth, S.P.; Campbell, A.M.; Liang, W. Y.; Flükiger, R.; Gladyshevskii, R.

doi:10.1016/0921-4534(96)00097-4

Cited by 23 publications

(4 citation statements)

References 22 publications

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“…Data for sample SR-840, SR-820 and SP-820 more closely follow the 'strip' losses up to the critical current (with no adjustable parameters). This is in contrast to previously published results on monocore and multifilamentary Bi-2223 tape [17,26] and monocore thallium-2223 tape [27]. As a consequence of this the AC losses in these 'tube-in-tube' tapes are substantially lower than for OPIT tapes following the 'ellipse' behaviour.…”

Section: Ac Transport Lossescontrasting

confidence: 92%

“…For our tapes the fitting parameters are given in table 1. Fitting our data to the exponential model yields values of δ ≈ 0.19-0.36, very close to that for bare Bi-2223 samples (extracted from magnetization measurements), and about one order of magnitude greater than those for sintered YBCO-123 ceramics [29], as well as for Ag-Tl-1223 tapes [27].…”

Section: Critical Currentssupporting

confidence: 67%

See 1 more Smart Citation

Self-field AC losses and critical currents in multi-tube Ag - Bi-2223 conductors

Ciszek

Ashworth

James

et al. 1996

Supercond. Sci. Technol.

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The purpose of this work was to investigate the influence of different technological treatments of silver sheathed Bi-2223 tapes on the critical current density and the AC transport losses. The tapes were produced using the 'tube-in-tube' technique, by including a silver rod in the centre of the superconducting powder during packing of the silver tube. The aim of the process is to increase the silver to superconductor surface area and thus also the alignment at the centre of the conductor ceramic core. AC transport losses were measured by means of an electrical method using sinusoidally varying currents in the frequency range 30-180 Hz. In this range the power losses are hysteretic. The measured variation in losses from those predicted by a critical state model is attributed to the complex geometry of superconducting regions existing in these tapes.

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Section: Ac Transport Lossescontrasting

confidence: 92%

Section: Critical Currentssupporting

confidence: 67%

Self-field AC losses and critical currents in multi-tube Ag - Bi-2223 conductors

Ciszek

Ashworth

James

et al. 1996

Supercond. Sci. Technol.

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“…It is well documented that the transport AC loss measured on tapes of HTS does not exactly follow either of these two theoretical predictions, derived for a round (or elliptical) wire and for a thin strip [2]- [5]. The reason is that these simple models are not considering the detailed structure and properties of superconductors.…”

Section: Introductionmentioning

confidence: 74%

Study of BSSCO/Ag Tapes With the Help of Voltage Signal Analysis

Klinčok

Gömöry

Dhallé

2007

IEEE Trans. Appl. Supercond.

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Properties of BSSCO/Ag tapes transporting AC current were studied by the Fourier analysis of the accompanying voltage signal. Particularly, the electrical signal in the measurement loop that is used in the standard AC loss measurement has been investigated. BSSCO/Ag tapes were studied starting from the characterization of the filament configuration, ( ) dependence and inhomogeneity of distribution. These data were used as the input parameters for the numerical simulations. Initial simulations showed the necessity of replacing the simplified geometry model with detailed mutlifilamentary structure. Consequently, the higher harmonics turned out to be extremely sensitive on characterization parameters. After such refinement, the results of simulations give good agreement with measured higher harmonics of the voltage signal. This means that the analysis of higher harmonics could provide relevant information about the structure and other basic properties of the measured tape.

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“…Taking it into account the field dependence of the critical current could be given in the following form [3]:…”

Section: Introductionmentioning

confidence: 99%

Kim-Type Critical State Models and Critical Currents of Thallium Based Superconductors

et al. 2008

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The two extended formulae in the power form of the Kim critical state model were used to fit the critical currents versus the dc applied magnetic field. Two samples of thallium based superconductors: the (Tl0.6Pb0.24Bi0.16)(Sr0.9Ba0.1)2Ca2Cu3Oy film on single-crystalline lanthanum aluminate and the bulk (Tl 0.5 Pb 0.5 )Sr 2 (Ca 1.8 Gd 0.2 )Cu 2 O y were chosen to test the models. The formulae were compared to the percolation model described by the exponential expression. The first model fits the experimental data better for the thallium based film whereas the second approach is better for the thallium based bulk sample.

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AC losses and critical currents in Ag/(Tl,Pb,Bi)-1223 tape

Cited by 23 publications

References 22 publications

Self-field AC losses and critical currents in multi-tube Ag - Bi-2223 conductors

Self-field AC losses and critical currents in multi-tube Ag - Bi-2223 conductors

Study of BSSCO/Ag Tapes With the Help of Voltage Signal Analysis

Kim-Type Critical State Models and Critical Currents of Thallium Based Superconductors

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