YBaCuO current lead for liquid helium temperature applications

A study was made of the losses of a double current lead (copper from 300 K to 77 K and YBaCuO from 77 K to 4.2 K). The authors give the main results obtained: (1) on the value of 1/J/sub c/ integral /sub 4.2/ /sub K//sup 77/ /sup K/KdT, (2) on the electrical contact resistance between YBaCuO and met...

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Veröffentlicht in:	IEEE Transactions on Magnetics (Institute of Electrical and Electronics Engineers); (United States) 1991-03, Vol.27 (2), p.1866-1869
Hauptverfasser:	Grivon, F., Leriche, A., Cottevieille, C., Kermarrec, J.C., Petitbon, A., Fevrier, A., Laumond, Y.
Format:	Artikel
Sprache:	eng
Schlagworte:	360204 > Ceramics, Cermets, & Refractories-- Physical Properties ALKALINE EARTH METAL COMPOUNDS Applied sciences BARIUM COMPOUNDS BARIUM OXIDES CHALCOGENIDES CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY Conducting materials Cooling COPPER COPPER COMPOUNDS COPPER OXIDES CURRENTS DATA ELECTRIC CONDUCTIVITY ELECTRIC CONDUCTORS ELECTRIC CURRENTS Electrical engineering. Electrical power engineering ELECTRICAL PROPERTIES ELECTRONIC EQUIPMENT ELEMENTS Exact sciences and technology EXPERIMENTAL DATA Helium INFORMATION LOSSES MATERIALS SCIENCE METALS NUMERICAL DATA OXIDES OXYGEN COMPOUNDS Pareto optimization PHYSICAL PROPERTIES POWER SUPPLIES Resistance heating Superconducting coils SUPERCONDUCTING DEVICES SUPERCONDUCTING WIRES Temperature Thermal conductivity TRANSITION ELEMENT COMPOUNDS TRANSITION ELEMENTS Various equipment and components WIRES Yttrium barium copper oxide YTTRIUM COMPOUNDS 665412 > Superconducting Devices-- (1992-) YTTRIUM OXIDES
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Beschreibung
Zusammenfassung:	A study was made of the losses of a double current lead (copper from 300 K to 77 K and YBaCuO from 77 K to 4.2 K). The authors give the main results obtained: (1) on the value of 1/J/sub c/ integral /sub 4.2/ /sub K//sup 77/ /sup K/KdT, (2) on the electrical contact resistance between YBaCuO and metal, (3) on the transport critical current density and 50-Hz losses of sintered tubes and textured material, and (4) on a 1-kA double DC current lead. On the basis of these results, it seems possible to decrease the current lead losses by a factor of 5.
ISSN:	0018-9464 1941-0069
DOI:	10.1109/20.133560