ANOMALOUS SWITCHING PHENOMENON IN CRITICAL-CURRENT MEASUREMENTS WHEN USING CONDUCTIVE MANDRELS

Authors
GOODRICH LF WIEJACZKA JA SRIVASTAVA AN
Citation
Lf. Goodrich et al., ANOMALOUS SWITCHING PHENOMENON IN CRITICAL-CURRENT MEASUREMENTS WHEN USING CONDUCTIVE MANDRELS, IEEE transactions on applied superconductivity, 5(3), 1995, pp. 3442-3444
Citations number
6
Categorie Soggetti
Engineering, Eletrical & Electronic","Physics, Applied
Journal title
IEEE transactions on applied superconductivity → ACNP
ISSN journal
10518223
Volume
5
Issue
3
Year of publication
1995
Pages
3442 - 3444
Database
ISI
SICI code
1051-8223(1995)5:3<3442:ASPICM>2.0.ZU;2-X
Abstract
NIST and other laboratories have observed an anomalous switching pheno menon that can occur in critical-current measurements of coiled Nb-Ti and Nb3Sn superconductors when mounted on an electrically-conductive m easurement mandrel. During acquisition of the voltage-current (V-I) ch aracteristic, large voltage discontinuities are observed. This switchi ng phenomenon results in a multivalued V-I curve, and apparently multi ple ''critical-current'' values. An explanation of this phenomenon, so me necessary conditions for the switching to occur, as well as methods of detecting the phenomenon are given.