Testing of high temperature superconductors for cryogenic current lead applications

Author

Wu, J.L.

Author_Institution

Westinghouse Sci. & Technol. Center, Pittsburgh, PA, USA

Volume

3

Issue

1

fYear

1993

fDate

3/1/1993 12:00:00 AM

Firstpage

396

Lastpage

399

Abstract

As part of a developmental effort to bring the technology of high-temperature superconducting current lead to practical applications, device-size high-temperature superconductor (HTSC) samples supplied by various vendor sources were tested. The tests include measurements of DC transport critical current I/sub c/, current density (J/sub c/), and electrical joint resistance (R/sub c/) under externally applied magnetic field in a LN/sub 2/ bath, as well as the effects of thermal cycling on these parameters for one selected sample. Dependence of R/sub c/ on temperature was also evaluated. Based on these tests, a set of HTSC bars was ordered and used in a prototype multiple lead assembly. This lead assembly demonstrated experimentally a two to one reduction in heat leak. The work related to the testing of the HTSC samples is addressed.<>

Keywords

high-temperature superconductors; low-temperature techniques; wires (electric); DC transport critical current; LN/sub 2/ bath; N/sub 2/; cryogenic current lead applications; current density; electrical joint resistance; externally applied magnetic field; heat leak; high temperature superconductors; multiple lead assembly; thermal cycling; Assembly; Critical current; Cryogenics; Current measurement; Density measurement; Electric variables measurement; Electrical resistance measurement; High temperature superconductors; Testing; Thermal resistance;

fLanguage

English

Journal_Title

Applied Superconductivity, IEEE Transactions on

Publisher

ieee

ISSN

1051-8223

Type

jour

DOI

10.1109/77.233728

Filename

233728