RRR measurements on a SMES-ETM mockup superconductor

Author

Hartwig, K.T. ; McDonald, L.C. ; Harper, J.D. ; Hua, C.Y.

Author_Institution

Texas A&M Univ., College Station, TX, USA

Volume

5

Issue

2

fYear

1995

fDate

6/1/1995 12:00:00 AM

Firstpage

307

Lastpage

310

Abstract

An unconventional, easy to perform method is used to determine the in situ residual resistivity ratio (RRR) of the major stabilizer region of superconductive magnetic energy storage (SMES) engineering test magnet (ETM) 60,000 amp composite superconductor. Measurements are taken by the eddy current decay (ECD) method. A primary benefit of the ECD technique is that measurements are possible at 4.2 K with superconducting filaments present. By taking measurements at 4.2 K and room temperature, the stabilizer RRR can be determined without concern for conductor geometry. Results show that this method holds promise as a tool for monitoring the residual resistivity of heavily stabilized superconductors under normal operating circumstances (wound into a magnet and below T/sub c/).<>

Keywords

eddy currents; electrical resistivity; multifilamentary superconductors; power cable testing; superconducting magnet energy storage; superconducting magnets; 4.2 K; 60000 A; SMES; composite superconductor; conductor geometry; eddy current decay method; engineering test magnet; measurements; monitoring; residual resistivity ratio; stabilizer region; superconducting filaments; superconductive magnetic energy storage; Conductivity; Energy storage; Performance evaluation; Power engineering and energy; Samarium; Superconducting filaments and wires; Superconducting magnetic energy storage; Superconducting magnets; Superconductivity; Testing;

fLanguage

English

Journal_Title

Applied Superconductivity, IEEE Transactions on

Publisher

ieee

ISSN

1051-8223

Type

jour

DOI

10.1109/77.402550

Filename

402550