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A New Experimental Method to Determine the Local Critical Current Density in High-temperature Superconducting Tapes by B ten Haken; H.J.N van Eck; H.H.J ten Kate is a Physics and Astronomy article available to read on EtoBox.

What is A New Experimental Method to Determine the Local Critical Current Density in High-temperature Superconducting Tapes about?

The lateral critical current density J distribution in high-temperature superconducting tapes is determined with a new c experimental method. With this method it is possible to determine a J -profile in a non-destructive manner. The experiment c Ž . utilizes the strong suppression that occurs in the critical current I when a perpendicular magnetic field is applied to a c Bi-2223 tape. A perpendicular magnetic field with a strong gradient that passes through zero is applied to a tape, to select a zone where the perpendicular field is small. This magnetically selected zone then determines the I of the entire tape. By c moving this field gradient along the tape it is possible to observe the spatial variations in J . For a quantitative analysis of c the critical current density a deconvolution of the measured I -profile with the system response is required. The local c superconducting area is obtained from an optical micrograph of the tape cross-section. Finally a position dependent J is c determined for two different types of superconducting tape.

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Author

B ten Haken; H.J.N van Eck; H.H.J ten Kate

Publisher

Elsevier Science; Elsevier ; Elsevier BV (ISSN 0921-4534)

Published

2000

Language

EN

Field

Physics and Astronomy (Physical Sciences)