Publication

Measurement and Modeling of the Dynamic Behavior of Ag/Bi(2223) Superconducting Tapes

Martin Hasler, Bertrand Dutoit
1994
Journal Articles

Résumé

Measurements of Ag/Bi(2223) superconducting tapes have been performed between dc and 30 KHz for under and upper critical currents, up to 2 or 3 times i(c). A fast power amplifier (100A 30KHz) has been specially built for pulsing such currents in the samples. Measurements in this type of samples show some ac losses. Modeling based on the dc non linearity, triangle and sine measurements is made in such a way that the behavior of superconducting devices using this type of tapes can be predicted, for any currents in frequency ranges up to 30 KHz and intensity up to 3 times i(c). We observe an excellent superconductivity recovery of these samples, and our simple equivalent circuit model offers a good prediction of the sample behaviour.

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https://infoscience.epfl.ch/entities/publication/35347ea8-2f5a-4ea9-aa81-7e7d12908fbc

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Martin Hasler, Bertrand Dutoit
1994
Journal Articles

Résumé

Source officielle

https://infoscience.epfl.ch/entities/publication/35347ea8-2f5a-4ea9-aa81-7e7d12908fbc

À propos de ce résultat

Concepts associés (32)

Superconducting magnet

A superconducting magnet is an electromagnet made from coils of superconducting wire. They must be cooled to cryogenic temperatures during operation. In its superconducting state the wire has no electrical resistance and therefore can conduct much larger electric currents than ordinary wire, creating intense magnetic fields. Superconducting magnets can produce stronger magnetic fields than all but the strongest non-superconducting electromagnets, and large superconducting magnets can be cheaper to operate because no energy is dissipated as heat in the windings.

Superconducting wire

Superconducting wires are electrical wires made of superconductive material. When cooled below their transition temperatures, they have zero electrical resistance. Most commonly, conventional superconductors such as niobium–titanium are used, but high-temperature superconductors such as YBCO are entering the market. Superconducting wire's advantages over copper or aluminum include higher maximum current densities and zero power dissipation.

Technological applications of superconductivity

Technological applications of superconductivity include: the production of sensitive magnetometers based on SQUIDs (superconducting quantum interference devices) fast digital circuits (including those based on Josephson junctions and rapid single flux quantum technology), powerful superconducting electromagnets used in maglev trains, magnetic resonance imaging (MRI) and nuclear magnetic resonance (NMR) machines, magnetic confinement fusion reactors (e.g.

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Publications associées (4)

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Measurement and Modeling of the Dynamic Behavior of Ag/Bi(2223) Superconducting Tapes

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